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oxygen.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Oxygen</title>
<script src="chem1.js" defer></script>
<script src="timer.js" defer></script>
<meta name="keywords" content="exercises, balancing, chemistry, equations, hydrogen, Oxygen, carbon-dioxide, carbon-monoxide, preparation">
<meta name="author" content="Jiban Majumdar">
<link rel="stylesheet" href="mystyle.css">
</head>
<body>
<div>
<img src="myPhoto.jpg" alt="webmaster" width="150" height="200"> <br> <a href="mailto:jibanmajumdar@gmail.com">webmaster</a>
</div>
<table class="center">
<tr>
<td>
<a href="index.html">Home Page</a>
</td>
<td>
<a href="equations.html">Intermediate Equations</a>
</td>
<td>
<a href="assorted.html">Assorted Equations</a>
</td>
<td>
<a href="Hydrogen.html">Hydrogen</a>
</td>
<td>
<a href="Carbon-Monoxide.html">Carbon Monoxide</a>
</td>
<td>
<a href="Carbon-Dioxide.html">Carbon Dioxide</a>
</td>
<td>
<a href="Nitrogen.html">Nitrogen</a>
</td>
</tr>
</table>
<h1 style="text-align:center;">Oxygen</h1>
<h2>Practise balancing equations:</h2>
<h3>Direction:</h3>
<ul>
<li>In the following equations you will see a blank box before the symbol of each compound and element. Enter the lowest possible number in each box, or leave the box blank if you think the chemical needn't have a number (i.e. the number is equivalent to '1').</li>
<li>
When you think the equation is balanced, click on the small button
<span style="color:blue;">
<b>"Check answer"</b>
</span>
that appears below it.
</li>
<lI>
If your equation is incorrect, then click the button
<span style="color:blue;">
<b>"Reset"</b>
</span>
and try balancing the equation again.
</li>
<li>
In case you are in a hurry or are unable to balance, then click the button
<span style="color:blue;">
<b>"Show answer."</b>
</span>
</li>
<li>If you want to know the time taken (minutes:seconds) to balance a chemical equation, you click the <span style="color:blue;"><b>"Start"</b></span> button and after balancing the equation, click the <span style="color:blue;"><b>"Stop"</b></span>button. Once, you have noted the time, click the <span style="color:blue;"><b>"Reset Timer"</b></span> button.
</li>
</ul>
<h3>Note:</h3>
If you get no response after clicking 'Check answer' or 'Show answer', your browser has disabled to run this program. Enable it by clicking below the 'address bar' and follow the instructions.
<form name="equations">
<h4>Preparation of Oxygen(Laboratory Methods):</h4>
1.In the presence of Manganese(IV) oxide(catalyst), Hydrogen peroxide decomposes faster into water and Oxygen:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q1a>
H<sub>2</sub>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q1b>
H<sub>2</sub>
O + <input style="font-size: 16px; text-align: center" size=1 name=q1c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(1,'Preparation of Oxygen(Laboratory Methods)',2,2,1,0,0,0,'H<sub>2</sub>O<sub>2</sub>','H<sub>2</sub>O + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(1,'Preparation of Oxygen(Laboratory Methods)',2,2,1,0,0,0,'2 H<sub>2</sub>O<sub>2</sub>','2 H<sub>2</sub>O + O<sub>2</sub>');" type="button" value="Show answer">
</p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer1">00:00</span>
<button type="button" onclick="startTimer('timer1')">Start</button>
<button type="button" onclick="stopTimer('timer1')">Stop</button>
<button type="button" onclick="resetTimer('timer1')">Reset Timer</button>
</p>
<p></p>
2.In the presence of Manganese(IV) oxide(catalyst), Potassium chlorate decomposes faster into Potassium chloride and Oxygen:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q2a>
KClO<sub>3</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q2b>
KCl + <input style="font-size: 16px; text-align: center" size=1 name=q2c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(2,'Preparation of Oxygen(Laboratory Methods)',2,2,3,0,0,0,'KClO<sub>3</sub>','KCl + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(2,'Preparation of Oxygen(Laboratory Methods)',2,2,3,0,0,0,'2 KClO<sub>3</sub>','2 KCl + 3 O<sub>2</sub>');" type="button" value="Show answer">
</p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer2">00:00</span>
<button type="button" onclick="startTimer('timer2')">Start</button>
<button type="button" onclick="stopTimer('timer2')">Stop</button>
<button type="button" onclick="resetTimer('timer2')">Reset Timer</button>
</p>
<p></p>
3.Sodium peroxide reacts with water to form Sodium hydroxide and Oxygen:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q3a>
Na<sub>2</sub>
O<sub>2</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q3b>
H<sub>2</sub>
O → <input style="font-size: 16px; text-align: center" size=1 name=q3c>
NaOH+ <input style="font-size: 16px; text-align: center" size=1 name=q3d>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(3,'Preparation of Oxygen(Laboratory Methods)',2,2,4,1,0,0,'Na<sub>2</sub>O<sub>2</sub> + H<sub>2</sub>O','NaOH + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(3,'Preparation of Oxygen(Laboratory Methods)',2,2,4,1,0,0,'2 Na<sub>2</sub>O<sub>2</sub> + 2 H<sub>2</sub>O','4 NaOH + O<sub>2</sub>');" type="button" value="Show answer">
</p>
<p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer3">00:00</span>
<button type="button" onclick="startTimer('timer3')">Start</button>
<button type="button" onclick="stopTimer('timer3')">Stop</button>
<button type="button" onclick="resetTimer('timer3')">Reset Timer</button>
</p>
<p></p>
<h4>Preparation of Oxygen(Other methods):</h4>
1.When chocolate brown Lead(IV) oxide is heated strongly, it decomposes into yellow Lead(II) oxide powder and Oxygen gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q4a>
PbO<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q4b>
PbO + <input style="font-size: 16px; text-align: center" size=1 name=q4c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(4,'Preparation of Oxygen(Other methods)',2,2,1,0,0,0,'PbO<sub>2</sub>','PbO + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(4,'Preparation of Oxygen(Other methods)',2,2,1,0,0,0,'2 PbO<sub>2</sub>','2PbO + O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer4">00:00</span>
<button type="button" onclick="startTimer('timer4')">Start</button>
<button type="button" onclick="stopTimer('timer4')">Stop</button>
<button type="button" onclick="resetTimer('timer4')">Reset Timer</button>
</p>
<p></p>
2.When orange-red Lead(II,IV) oxide(Tri Lead tetroxide) is heated strongly, it decomposes into yellow lead(II) oxide powder and Oxygen gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q5a>
Pb<sub>3</sub>
O<sub>4</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q5b>
PbO + <input style="font-size: 16px; text-align: center" size=1 name=q5c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(5,'Preparation of Oxygen(Other methods)',2,6,1,0,0,0,'Pb<sub>3</sub>O<sub>4</sub>','PbO + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(5,'Preparation of Oxygen(Other methods)',2,6,1,0,0,0,'2 Pb<sub>3</sub>O<sub>4</sub>','6 PbO + O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer5">00:00</span>
<button type="button" onclick="startTimer('timer5')">Start</button>
<button type="button" onclick="stopTimer('timer5')">Stop</button>
<button type="button" onclick="resetTimer('timer5')">Reset Timer</button>
</p>
<p></p>
3.When red Mercury(II) oxide is heated strongly, it decomposes into Mercury and Oxygen gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q6a>
HgO → <input style="font-size: 16px; text-align: center" size=1 name=q6b>
Hg + <input style="font-size: 16px; text-align: center" size=1 name=q6c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(6,'Preparation of Oxygen(Other methods)',2,2,1,0,0,0,'HgO','Hg + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(6,'Preparation of Oxygen(Other methods)',2,2,1,0,0,0,'2 HgO','2Hg + O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer6">00:00</span>
<button type="button" onclick="startTimer('timer6')">Start</button>
<button type="button" onclick="stopTimer('timer6')">Stop</button>
<button type="button" onclick="resetTimer('timer6')">Reset Timer</button>
</p>
<p></p>
4.When brown Silver oxide is heated strongly, it decomposes into Silver and Oxygen gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q7a>
Ag<sub>2</sub>
O → <input style="font-size: 16px; text-align: center" size=1 name=q7b>
Ag + <input style="font-size: 16px; text-align: center" size=1 name=q7c>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(7,'Preparation of Oxygen(Other methods)',2,4,1,0,0,0,'Ag<sub>2</sub>O','Ag + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(7,'Preparation of Oxygen(Other methods)',2,4,1,0,0,0,'2 Ag<sub>2</sub>O','4 Ag + O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer7">00:00</span>
<button type="button" onclick="startTimer('timer7')">Start</button>
<button type="button" onclick="stopTimer('timer7')">Stop</button>
<button type="button" onclick="resetTimer('timer7')">Reset Timer</button>
</p>
<p></p>
5.When Potassium permanganate is heated, it decomposes into Potassium manganate, Manganese(IV) oxide and Oxygen gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q8a>
KMnO<sub>4</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q8b>
K<sub>2</sub>
MnO<sub>4</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q8c>
MnO<sub>2</sub>
+
<input style="font-size: 16px; text-align: center" size=1 name=q8d>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(8,'Preparation of Oxygen(Other methods)',2,1,1,1,0,0,'KMnO<sub>4</sub> ','K<sub>2</sub>MnO<sub>4</sub>+ MnO<sub>2</sub> + O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(8,'Preparation of Oxygen(Other methods)',2,1,1,1,0,0,'2 KMnO<sub>4</sub> ','K<sub>2</sub>MnO<sub>4</sub>+ MnO<sub>2</sub> + O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer8">00:00</span>
<button type="button" onclick="startTimer('timer8')">Start</button>
<button type="button" onclick="stopTimer('timer8')">Stop</button>
<button type="button" onclick="resetTimer('timer8')">Reset Timer</button>
</p>
<p></p>
<h4>Reactions of Oxygen:</h4>
<ul>
<li>
<h4>With Non-metals:</h4>
</li>
</ul>
1.A mixture of Hydrogen and Oxygen, when ignited, burns with a 'pop' sound to form water:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q9a>
H<sub>2</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q9b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q9c>
H<sub>2</sub>
O
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(9,'Reactions of Oxygen',2,1,2,0,0,0,'H<sub>2</sub> + O<sub>2</sub>','H<sub>2</sub>O');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(9,'Reactions of Oxygen',2,1,2,0,0,0,'2 H<sub>2</sub> + O<sub>2</sub>','2 H<sub>2</sub>O');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer9">00:00</span>
<button type="button" onclick="startTimer('timer9')">Start</button>
<button type="button" onclick="stopTimer('timer9')">Stop</button>
<button type="button" onclick="resetTimer('timer9')">Reset Timer</button>
</p>
<p></p>
2.Carbon , when ignited,burns in excess Oxygen to form Carbon dioxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q10a>
C + <input style="font-size: 16px; text-align: center" size=1 name=q10b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q10c>
CO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(10,'Reactions of Oxygen',1,1,1,0,0,0,'C + O<sub>2</sub>','CO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(10,'Reactions of Oxygen',1,1,1,0,0,0,'C + O<sub>2</sub>','CO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer10">00:00</span>
<button type="button" onclick="startTimer('timer10')">Start</button>
<button type="button" onclick="stopTimer('timer10')">Stop</button>
<button type="button" onclick="resetTimer('timer10')">Reset Timer</button>
</p>
<p></p>
3.In limited amount of air Carbon , when ignited,forms Carbon monoxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q11a>
C + <input style="font-size: 16px; text-align: center" size=1 name=q11b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q11c>
CO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(11,'Reactions of Oxygen',2,1,2,0,0,0,'C + O<sub>2</sub>','CO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(11,'Reactions of Oxygen',2,1,2,0,0,0,'2 C + O<sub>2</sub>','2 CO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer11">00:00</span>
<button type="button" onclick="startTimer('timer11')">Start</button>
<button type="button" onclick="stopTimer('timer11')">Stop</button>
<button type="button" onclick="resetTimer('timer11')">Reset Timer</button>
</p>
<p></p>
4.
At 3000<sup>o</sup>
C or during lightning discharge, Nitrogen reacts with Oxygen to form Nirogen monoxide(Nitric oxide):
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q12a>
N<sub>2</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q12b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q12c>
NO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(12,'Reactions of Oxygen',1,1,2,0,0,0,'N<sub>2</sub> + O<sub>2</sub>','NO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(12,'Reactions of Oxygen',1,1,2,0,0,0,'N<sub>2</sub> + O<sub>2</sub>','2 NO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer12">00:00</span>
<button type="button" onclick="startTimer('timer12')">Start</button>
<button type="button" onclick="stopTimer('timer12')">Stop</button>
<button type="button" onclick="resetTimer('timer12')">Reset Timer</button>
</p>
<p></p>
5.Phosphorous, when ignited,burns in Oxygen to form white fumes of Phosphorous pentoxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q13a>
P + <input style="font-size: 16px; text-align: center" size=1 name=q13b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q13c>
P<sub>2</sub>
O<sub>5</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(13,'Reactions of Oxygen',4,5,2,0,0,0,'P + O<sub>2</sub>','P<sub>2</sub>O<sub>5</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(13,'Reactions of Oxygen',4,5,2,0,0,0,'4 P + 5 O<sub>2</sub>','2 P<sub>2</sub>O<sub>5</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer13">00:00</span>
<button type="button" onclick="startTimer('timer13')">Start</button>
<button type="button" onclick="stopTimer('timer13')">Stop</button>
<button type="button" onclick="resetTimer('timer13')">Reset Timer</button>
</p>
<p></p>
6.Sulphur , when ignited,burns in Oxygen with a blue flame to form colourless and pungent smelling Sulphur dioxide gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q14a>
S + <input style="font-size: 16px; text-align: center" size=1 name=q14b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q14c>
SO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(14,'Reactions of Oxygen',1,1,1,0,0,0,'S + O<sub>2</sub>','SO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(14,'Reactions of Oxygen',1,1,1,0,0,0,'S + O<sub>2</sub>','SO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer14">00:00</span>
<button type="button" onclick="startTimer('timer14')">Start</button>
<button type="button" onclick="stopTimer('timer14')">Stop</button>
<button type="button" onclick="resetTimer('timer14')">Reset Timer</button>
</p>
<p></p>
<ul>
<li>
<h4>With Metals:</h4>
</li>
</ul>
1.Potassium metal, when ignited, burns in oxygen with a lilac flame to form a mixture of Potassium oxide and Potassium superoxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q15a>
K + <input style="font-size: 16px; text-align: center" size=1 name=q15b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q15c>
K<sub>2</sub>
O
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(15,'Reactions of Oxygen',4,1,2,0,0,0,'K + O<sub>2</sub>','K<sub>2</sub>O');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(15,'Reactions of Oxygen',4,1,2,0,0,0,'4K + O<sub>2</sub>','2 K<sub>2</sub>O');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer15">00:00</span>
<button type="button" onclick="startTimer('timer15')">Start</button>
<button type="button" onclick="stopTimer('timer15')">Stop</button>
<button type="button" onclick="resetTimer('timer15')">Reset Timer</button>
</p>
<p></p>
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q16a>
K + <input style="font-size: 16px; text-align: center" size=1 name=q16b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q16c>
KO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(16,'Reactions of Oxygen',1,1,1,0,0,0,'K + O<sub>2</sub>','KO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(16,'Reactions of Oxygen',1,1,1,0,0,0,'K + O<sub>2</sub>',' KO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer16">00:00</span>
<button type="button" onclick="startTimer('timer16')">Start</button>
<button type="button" onclick="stopTimer('timer16')">Stop</button>
<button type="button" onclick="resetTimer('timer16')">Reset Timer</button>
</p>
<p></p>
2.Sodium metal, when ignited, burns in oxygen with a yellow flame to form a mixture of Sodium oxide and Sodium peroxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q17a>
Na + <input style="font-size: 16px; text-align: center" size=1 name=q17b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q17c>
Na<sub>2</sub>
O
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(17,'Reactions of Oxygen',4,1,2,0,0,0,'Na + O<sub>2</sub>','Na<sub>2</sub>O');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(17,'Reactions of Oxygen',4,1,2,0,0,0,'4Na + O<sub>2</sub>','2 Na<sub>2</sub>O');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer17">00:00</span>
<button type="button" onclick="startTimer('timer17')">Start</button>
<button type="button" onclick="stopTimer('timer17')">Stop</button>
<button type="button" onclick="resetTimer('timer17')">Reset Timer</button>
</p>
<p></p>
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q18a>
Na + <input style="font-size: 16px; text-align: center" size=1 name=q18b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q18c>
Na<sub>2</sub>
O<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(18,'Reactions of Oxygen',2,1,1,0,0,0,'Na + O<sub>2</sub>','Na<sub>2</sub>O<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(16,'Reactions of Oxygen',2,1,1,0,0,0,'2 Na + O<sub>2</sub>',' Na<sub>2</sub>O<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer18">00:00</span>
<button type="button" onclick="startTimer('timer18')">Start</button>
<button type="button" onclick="stopTimer('timer18')">Stop</button>
<button type="button" onclick="resetTimer('timer18')">Reset Timer</button>
</p>
<p></p>
3.Calcium metal, when ignited, burns in oxygen with a brick red flame to form white Calcium oxide powder:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q19a>
Ca + <input style="font-size: 16px; text-align: center" size=1 name=q19b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q19c>
CaO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(19,'Reactions of Oxygen',2,1,2,0,0,0,'Ca + O<sub>2</sub>','CaO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(19,'Reactions of Oxygen',2,1,2,0,0,0,'2 Ca + O<sub>2</sub>',' 2 CaO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer19">00:00</span>
<button type="button" onclick="startTimer('timer19')">Start</button>
<button type="button" onclick="stopTimer('timer19')">Stop</button>
<button type="button" onclick="resetTimer('timer19')">Reset Timer</button>
</p>
<p></p>
4.Magnesium metal, when ignited, burns in oxygen with a dazzling flame to form white Magnesium oxide powder:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q20a>
Mg + <input style="font-size: 16px; text-align: center" size=1 name=q20b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q20c>
MgO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(20,'Reactions of Oxygen',2,1,2,0,0,0,'Mg + O<sub>2</sub>','MgO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(20,'Reactions of Oxygen',2,1,2,0,0,0,'2 Mg + O<sub>2</sub>',' 2 MgO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer20">00:00</span>
<button type="button" onclick="startTimer('timer20')">Start</button>
<button type="button" onclick="stopTimer('timer20')">Stop</button>
<button type="button" onclick="resetTimer('timer20')">Reset Timer</button>
</p>
<p></p>
5.Heated Aluminium metal reacts with oxygen to form white Aluminium oxide powder:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q21a>
Al + <input style="font-size: 16px; text-align: center" size=1 name=q21b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q21c>
Al<sub>2</sub>
O<sub>3</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(21,'Reactions of Oxygen',4,3,2,0,0,0,'Al + O<sub>2</sub>','Al<sub>2</sub>O<sub>3</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(21,'Reactions of Oxygen',4,3,2,0,0,0,'4 Al + 3 O<sub>2</sub>','2 Al<sub>2</sub>O<sub>3</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer21">00:00</span>
<button type="button" onclick="startTimer('timer21')">Start</button>
<button type="button" onclick="stopTimer('timer21')">Stop</button>
<button type="button" onclick="resetTimer('timer21')">Reset Timer</button>
</p>
<p></p>
6.Heated Zinc metal reacts with oxygen to form Zinc oxide powder which is yellow when hot and white when cold:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q22a>
Zn + <input style="font-size: 16px; text-align: center" size=1 name=q22b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q22c>
ZnO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(22,'Reactions of Oxygen',2,1,2,0,0,0,'Zn + O<sub>2</sub>','ZnO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(22,'Reactions of Oxygen',2,1,2,0,0,0,'2 Zn + O<sub>2</sub>','2 ZnO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer22">00:00</span>
<button type="button" onclick="startTimer('timer22')">Start</button>
<button type="button" onclick="stopTimer('timer22')">Stop</button>
<button type="button" onclick="resetTimer('timer22')">Reset Timer</button>
</p>
<p></p>
7.Heated Iron metal reacts with oxygen to form bluish black Iron(II,III) oxide(Tri Iron tetroxide):
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q23a>
Fe + <input style="font-size: 16px; text-align: center" size=1 name=q23b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q23c>
Fe<sub>3</sub>
O<sub>4</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(23,'Reactions of Oxygen',3,2,1,0,0,0,'Fe + O<sub>2</sub>','Fe<sub>3</sub>O<sub>4');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(23,'Reactions of Oxygen',3,2,1,0,0,0,'3 Fe + 2 O<sub>2</sub>','Fe<sub>3</sub>O<sub>4');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer23">00:00</span>
<button type="button" onclick="startTimer('timer23')">Start</button>
<button type="button" onclick="stopTimer('timer23')">Stop</button>
<button type="button" onclick="resetTimer('timer23')">Reset Timer</button>
</p>
<p></p>
8.Heated Lead metal reacts with oxygen to form Lead(II) oxide powder which is orange when hot and yellow when cold:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q24a>
Pb + <input style="font-size: 16px; text-align: center" size=1 name=q24b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q24c>
PbO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(24,'Reactions of Oxygen',2,1,2,0,0,0,'Pb + O<sub>2</sub>','PbO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(24,'Reactions of Oxygen',2,1,2,0,0,0,'2 Pb + O<sub>2</sub>','2 PbO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer24">00:00</span>
<button type="button" onclick="startTimer('timer24')">Start</button>
<button type="button" onclick="stopTimer('timer24')">Stop</button>
<button type="button" onclick="resetTimer('timer24')">Reset Timer</button>
</p>
<p></p>
9.Heated Copper metal reacts with oxygen to form black Copper(II) oxide powder:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q25a>
Cu + <input style="font-size: 16px; text-align: center" size=1 name=q25b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q25c>
CuO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(25,'Reactions of Oxygen',2,1,2,0,0,0,'Cu + O<sub>2</sub>','CuO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(25,'Reactions of Oxygen',2,1,2,0,0,0,'2 Cu + O<sub>2</sub>','2 CuO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer25">00:00</span>
<button type="button" onclick="startTimer('timer25')">Start</button>
<button type="button" onclick="stopTimer('timer25')">Stop</button>
<button type="button" onclick="resetTimer('timer25')">Reset Timer</button>
</p>
<p></p>
10.Heated Mercury metal reacts with oxygen to form red Mercury(II) oxide powder:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q26a>
Hg + <input style="font-size: 16px; text-align: center" size=1 name=q26b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q26c>
HgO
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(26,'Reactions of Oxygen',2,1,2,0,0,0,'Hg + O<sub>2</sub>','HgO');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(26,'Reactions of Oxygen',2,1,2,0,0,0,'2 Hg + O<sub>2</sub>','2 HgO');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer26">00:00</span>
<button type="button" onclick="startTimer('timer26')">Start</button>
<button type="button" onclick="stopTimer('timer26')">Stop</button>
<button type="button" onclick="resetTimer('timer26')">Reset Timer</button>
</p>
<p></p>
<ul>
<li>
<h4>With Compounds:</h4>
</li>
</ul>
1.Carbon monoxide gas burns in Oxygen with a blue flame to form carbon dioxide gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q27a>
CO + <input style="font-size: 16px; text-align: center" size=1 name=q27b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q27c>
CO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(27,'Reactions of Oxygen',2,1,2,0,0,0,'CO + O<sub>2</sub>','CO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(27,'Reactions of Oxygen',2,1,2,0,0,0,'2 CO + O<sub>2</sub>','2 CO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer27">00:00</span>
<button type="button" onclick="startTimer('timer27')">Start</button>
<button type="button" onclick="stopTimer('timer27')">Stop</button>
<button type="button" onclick="resetTimer('timer27')">Reset Timer</button>
</p>
<p></p>
2.Nitrogen monoxide gas reacts with Oxygen to form reddish brown Nitrogen dioxide gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q28a>
NO + <input style="font-size: 16px; text-align: center" size=1 name=q28b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q28c>
NO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(28,'Reactions of Oxygen',2,1,2,0,0,0,'NO + O<sub>2</sub>','NO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(28,'Reactions of Oxygen',2,1,2,0,0,0,'2 NO + O<sub>2</sub>','2 NO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer28">00:00</span>
<button type="button" onclick="startTimer('timer28')">Start</button>
<button type="button" onclick="stopTimer('timer28')">Stop</button>
<button type="button" onclick="resetTimer('timer28')">Reset Timer</button>
</p>
<p></p>
3.
In the presence of Vanadium pentoxide(catalyst) at about 450<sup>o</sup>
C,Sulphur dioxide gas reacts with Oxygen to form Sulphur trioxide:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q29a>
SO<sub>2</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q29b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q29c>
SO<sub>3</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(29,'Reactions of Oxygen',2,1,2,0,0,0,'SO<sub>2</sub> + O<sub>2</sub>','SO<sub>3</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(29,'Reactions of Oxygen',2,1,2,0,0,0,'2 SO<sub>2</sub> + O<sub>2</sub>','2 SO<sub>3</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer29">00:00</span>
<button type="button" onclick="startTimer('timer29')">Start</button>
<button type="button" onclick="stopTimer('timer29')">Stop</button>
<button type="button" onclick="resetTimer('timer29')">Reset Timer</button>
</p>
<p></p>
4.When strongly heated in air, Zinc sulphide reacts with Oxygen to form Zinc oxide and Sulphur dioxide gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q30a>
ZnS + <input style="font-size: 16px; text-align: center" size=1 name=q30b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q30c>
ZnO + <input style="font-size: 16px; text-align: center" size=1 name=q30d>
SO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(30,'Reactions of Oxygen',2,3,2,2,0,0,'ZnS + O<sub>2</sub>','ZnO + SO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(30,'Reactions of Oxygen',2,3,2,2,0,0,'2 ZnS + 3 O<sub>2</sub>','2 ZnO + 2 SO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer30">00:00</span>
<button type="button" onclick="startTimer('timer30')">Start</button>
<button type="button" onclick="stopTimer('timer30')">Stop</button>
<button type="button" onclick="resetTimer('timer30')">Reset Timer</button>
</p>
<p></p>
5.When strongly heated in air, Lead(II) sulphide reacts with Oxygen to form Lead(II) oxide and Sulphur dioxide gas:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q31a>
PbS + <input style="font-size: 16px; text-align: center" size=1 name=q31b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q31c>
PbO + <input style="font-size: 16px; text-align: center" size=1 name=q31d>
SO<sub>2</sub>
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(31,'Reactions of Oxygen',2,3,2,2,0,0,'PbS + O<sub>2</sub>','PbO + SO<sub>2</sub>');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show(31,'Reactions of Oxygen',2,3,2,2,0,0,'2 PbS + 3 O<sub>2</sub>','2 PbO + 2 SO<sub>2</sub>');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer31">00:00</span>
<button type="button" onclick="startTimer('timer31')">Start</button>
<button type="button" onclick="stopTimer('timer31')">Stop</button>
<button type="button" onclick="resetTimer('timer31')">Reset Timer</button>
</p>
<p></p>
6.When ignited, Methane burns in Oxygen to form Carbon dioxide and water:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q32a>
CH<sub>4</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q32b>
O<sub>2</sub>
→ <input style="font-size: 16px; text-align: center" size=1 name=q32c>
CO<sub>2</sub>
+ <input style="font-size: 16px; text-align: center" size=1 name=q32d>
H<sub>2</sub>
O
</p>
<p style="font-size:115%; text-align:center;">
<input onclick="check(32,'Reactions of Oxygen',1,2,1,2,0,0,'CH<sub>4</sub> + O<sub>2</sub>','CO<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer">
<input type="reset" value="Reset">
<input onclick="show (32,'Reactions of Oxygen',1,2,1,2,0,0,'CH<sub>4</sub> + 2 O<sub>2</sub>','CO<sub>2</sub> + 2 H<sub>2</sub>O');" type="button" value="Show answer">
</p><p style="font-size:115%; text-align:center;">
<span style="color:blue;"><b>Time Taken:</b></span><span class="timer" id="timer32">00:00</span>
<button type="button" onclick="startTimer('timer32')">Start</button>
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<button type="button" onclick="resetTimer('timer32')">Reset Timer</button>
</p>
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