Question:
What volume of hydrogen gas, at $273\, K$ and $1$ atm. pressure will be consumed in obtaining $21.6 \,g$ of elemental boron (atomic mass $= 10.8$) from the reduction of boron trichloride by hydrogen ?
What volume of hydrogen gas, at $273\, K$ and $1$ atm. pressure will be consumed in obtaining $21.6 \,g$ of elemental boron (atomic mass $= 10.8$) from the reduction of boron trichloride by hydrogen ?
Updated On: Jun 23, 2023
- $67.2\, L$
- $44.8\,L$
- $22.4\, L$
- $89.6 \,L$
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The Correct Option is A
Solution and Explanation
$2BCl_{3} + 3H_{2} \to 2B + 6HCl$
or $BCl_{3} + \frac{3}{2} H_{2} \to B + 3HCl$
Now, since $10.8 \,gm$ boron requires hydrogen
$= \frac{3}{2} \times 22.4 \,L$ at N.T.P
hence $21.6 \,gm$ boron requires hydrogen
$\frac{3}{2} \times \frac{22.4}{10.8}\times21.6 = 67.2 \,L$ at N.T.P.
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There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
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