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nitrogen.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>Nitrogen</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">
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<td><a href="index.html">Home Page</a></td>
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<h1 style="text-align:center;">Nitrogen</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>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>If your equation is incorrect, then click the button <span style= "color:blue;"><b> "Reset"</b></span> and try balancing the equation again. <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>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.
</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 Nitrogen(Laboratory Method):</h4> <ul><li>When a mixture of Ammonium chloride and Sodium nitrite is heated, Nitrogen gas is formed: </li> </ul>
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q1a>NH<sub>4</sub>Cl + <input style="font-size: 16px; text-align: center"
size=1 name=q1b> NaNO<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q1c> NaCl + <input style="font-size: 16px; text-align: center" size=1 name=q1d > N<sub>2</sub> + <input style="font-size: 16px; text-align: center"
size=1 name=q1e> H<sub>2</sub>O</p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(1,'Preparation of Nitrogen(Laboratory Method)',1,1,1,1,2,0,'NH<sub>4</sub>Cl + NaNO<sub>2</sub>','NaCl + N<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(1,'Preparation of Nitrogen(Laboratory Method)',1,1,1,1,2,0,'NH<sub>4</sub>Cl + NaNO<sub>2</sub>','NaCl + N<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="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>
<h4>Preparation of Nitrogen(Other methods):</h4>1.When orange Ammonium dichromate is heated, green Chromium oxide and Nitrogen gas are formed:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q2a>(NH<sub>4</sub>)<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> → <input style="font-size: 16px; text-align: center"
size=1 name=q2b> Cr<sub>2</sub>O<sub>3</sub> <input style="font-size: 16px; text-align: center" size=1 name=q2c> N<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q2d > H<sub>2</sub>O</p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(2,'Preparation of Nitrogen(Other methods)',1,1,1,4,0,0,'(NH<sub>4</sub>)<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>','Cr<sub>2</sub>O<sub>3</sub> + N<sub>2</sub> + H<sub>2</sub>O');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(2,'Preparation of Nitrogen(Other methods)',1,1,1,4,0,0,'(NH<sub>4</sub>)<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>','Cr<sub>2</sub>O<sub>3</sub> + N<sub>2</sub> + 4 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="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>
2.When Ammonia gas is passed over heated black Copper(II) oxide, brown Copper powder, water and Nitrogen gas are formed:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q3a>NH<sub>3</sub> + <input style="font-size: 16px; text-align: center"
size=1 name=q3b> CuO → <input style="font-size: 16px; text-align: center" size=1 name=q3c> Cu + <input style="font-size: 16px; text-align: center" size=1 name=q3d > H<sub>2</sub>O + <input style="font-size: 16px; text-align: center"
size=1 name=q3e> N<sub>2</sub></p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(3,'Preparation of Nitrogen(Other methods)',2,3,3,3,1,0,'NH<sub>3</sub> + CuO','Cu + H<sub>2</sub>O + N<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(3,'Preparation of Nitrogen(Other methods)',2,3,3,3,1,0,'2 NH<sub>3</sub> + 3 CuO','3 Cu + 3 H<sub>2</sub>O + N<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>
3.When Ammonia gas is passed over heated yellow Lead(II) oxide, grey Lead powder, water and Nitrogen gas are formed:
<p style="font-size:115%; text-align:center;">
<input style="font-size: 16px; text-align: center" size=1 name=q4a>NH<sub>3</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> Pb + <input style="font-size: 16px; text-align: center" size=1 name=q4d > H<sub>2</sub>O + <input style="font-size: 16px; text-align: center"
size=1 name=q4e> N<sub>2</sub></p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(4,'Preparation of Nitrogen(Other methods)',2,3,3,3,1,0,'NH<sub>3</sub> + PbO','Pb + H<sub>2</sub>O + N<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(4,'Preparation of Nitrogen(Other methods)',2,3,3,3,1,0,'2 NH<sub>3</sub> + 3 PbO','3 Pb + 3 H<sub>2</sub>O + N<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>
<h4>Reactions of Nitrogen:</h4>
1.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=q5a> N<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q5b> O<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q5c>NO</p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(5,'Reactions of Nitrogen',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(5,'Reactions of Nitrogen',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="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>
2.When A mixture of Nitrogen gas and Hydrogen gas is passed over Iron catalyst at 200 atm pressure and 450<sup>o</sup>C, Ammonia gas is formed:
<p style="font-size:115%; text-align:center;"><input style="font-size: 16px; text-align: center"
size=1 name=q6a> N<sub>2</sub> + <input style="font-size: 16px; text-align:center" size=1 name=q6b> H<sub>2</sub> ⇌ <input style="font-size: 16px; text-align: center" size=1 name=q6c> NH<sub>3</sub></p>
<p style="font-size:115%; text-align:center;"><input onclick="check(6,'Reactions of Nitrogen',1,3,2,0,0,0,'N<sub>2</sub> + H<sub>2</sub>','NH<sub>3</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(6,'Reactions of Nitrogen',1,3,2,0,0,0,'N<sub>2</sub> + 3H<sub>2</sub>','2NH<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="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>
3. Burning Calcium metal reacts with Nitrogen to form Calcium nitride:
<p style="font-size:115%; text-align:center;"> <input style="font-size: 16px; text-align: center" size=1 name=q7a> Ca + <input style="font-size: 16px; text-align: center" size=1 name=q7b> N<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q7c>Ca<sub>3</sub>N<sub>2</sub></p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(7,'Reactions of Nitrogen',3,1,1,0,0,0,'Ca + N<sub>2</sub>','Ca<sub>3</sub>N<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(7,'Reactions of Nitrogen',3,1,1,0,0,0,'3 Ca + N<sub>2</sub>','Ca<sub>3</sub>N<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>
4. Burning Magnesium metal reacts with Nitrogen to form Magnesium nitride:
<p style="font-size:115%; text-align:center;"> <input style="font-size: 16px; text-align: center" size=1 name=q8a> Mg + <input style="font-size: 16px; text-align: center" size=1 name=q8b> N<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q8c>Mg<sub>3</sub>N<sub>2</sub></p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(8,'Reactions of Nitrogen',3,1,1,0,0,0,'Mg + N<sub>2</sub>','Mg<sub>3</sub>N<sub>2</sub>');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(8,'Reactions of Nitrogen',3,1,1,0,0,0,'3 Mg + N<sub>2</sub>','Mg<sub>3</sub>N<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>
5. Red hot Aluminium metal reacts with Nitrogen to form Aluminium nitride:
<p style="font-size:115%; text-align:center;"> <input style="font-size: 16px; text-align: center" size=1 name=q9a> Al + <input style="font-size: 16px; text-align: center" size=1 name=q9b> N<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q9c>AlN</p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(9,'Reactions of Nitrogen',2,1,2,0,0,0,'Al + N<sub>2</sub>','AlN');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(9,'Reactions of Nitrogen',2,1,2,0,0,0,'2 Al + N<sub>2</sub>','2 AlN');" 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>
6.At 1000<sup>o</sup>C Calcium carbide reacts with Nitrogen to form the fertilizer <i>Nitrolim</i>(A mixture of Calcium cyanamide and Carbon):
<p style="font-size:115%; text-align:center;"> <input style="font-size: 16px; text-align: center" size=1 name=q10a> CaC<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q10b> N<sub>2</sub> → <input style="font-size: 16px; text-align: center" size=1 name=q10c>CaCN<sub>2</sub> + <input style="font-size: 16px; text-align: center" size=1 name=q10d>C</p>
<p style="font-size:115%; text-align:center;"> <input onclick="check(10,'Reactions of Nitrogen',1,1,1,1,0,0,'CaC<sub>2</sub> + N<sub>2</sub>','CaCN<sub>2</sub> + C');" type="button" value="Check answer"> <input type="reset" value="Reset"> <input onclick="show(10,'Reactions of Nitrogen',1,1,1,1,0,0,'CaC<sub>2</sub> + N<sub>2</sub>','CaCN<sub>2</sub> + C');" 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>
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<button type="button" onclick="resetTimer('timer10')">Reset Timer</button>
</p>
<p></p>
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<tr>
<td><a href="index.html">Home Page</a></td>
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<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>
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