If 1 gram of each of the following gases are taken at STP. which of the gases will occupy 

(a) greatest volume and

(b) smallest volume ? 

CO,           H₂O,            CH₄,              NO 

<p><span data-teams="true">This is a short answer type question as classified in NCERT Exemplar</span></p><p><strong>&nbsp; (a)</strong> the greatest volume is occupied by CH₄and</p><p><strong> (b)</strong> the smallest volume by NO</p><p>According to Avagadro’s Law, </p><p>Volume of 1 mole of a gas at STP &nbsp; = &nbsp; 22.4 L</p><p>Now, we know, </p><p>1 mole&nbsp; = &nbsp; &nbsp; Molar mass</p><p>∴ &nbsp; Volume of 28g mol^-1 of CO at STP &nbsp; = &nbsp; 22.4 L</p><p>So, Volume of 1 g&nbsp; of CO at STP &nbsp; = &nbsp; 22.4 L / 28 g mol^-1</p><p>Similarly, &nbsp;</p><p>Volume of 1 g&nbsp; of&nbsp; H₂O at STP &nbsp; = &nbsp; 22.4 L / 18 g mol^-1</p><p>Volume of 1 g&nbsp; of&nbsp; CH₄ at STP &nbsp; = &nbsp; 22.4 L / 16 g mol^-1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (the greatest volume)</p><p>Volume of 1 g&nbsp; of&nbsp; NO at STP&nbsp; = &nbsp; 22.4 L / 30 g mol^-1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; (the smallest volume)</p>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment