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What volume of H2 gas at 273 K and 1 atm, pressure will be consumed in obtaining 21.6 g

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What volume of H2 gas at 273 K and 1 atm, pressure will be consumed in obtaining 21.6 g of elemental boron (atomic weight = 10.8 g) from the reduction of BCl3 with H2?

(a) 89.6 L

(b) 44.8L

(c) 67.2 L

(d) 22-4 L

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Correct option is (c) 67.2 L

2BCL3 + 3H2 → 2B + 6HCl

At NTP: 3 x 22.4 l   2 x 10.8 g

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