What volume of hydrogen gas at 273 K and1 atmospheric pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen ?
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a
22.4L
b
89.6L
c
67.2L
d
44.8L
answer is C.
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Detailed Solution
Reaction : 2BCl3+3H2⟶2B+6HCl …(1) 3×22.4L 2×10.8gWt. of boron B=21.6gNo.of moles of Boron =wM=21.610.8=2 2 moles of Boron requires 67.2 L H2 gas