Some Basic Concepts Of Chemistry Question 282

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 [AIEEE 2003]

Options:

A) 22.4 L

B) 89.6 L

C) 67.2 L

D) 44.8 L

Show Answer

Answer:

Correct Answer: C

Solution:

BCl3+3[H]B+3HCl

BCl3+32H2B+3HCl ; B=21.610.8=2 mole B32H2

1mole 32 mole ; 2 mole ? 3 mole V=3×22.4=67.2L .



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