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Q.

Benzene burns in oxygen according to the equation 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(l). How many litres of oxygen are required at STP for the complete combustion of 39g of liquid benzene?

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a

11.2

b

22.4

c

42

d

84

answer is D.

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Detailed Solution

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2C6H6(l) + 15O2(g)  12CO2(g) + 6H2O(l). 2×78g        15×22.4L  39g                    ? Vol. of O2 required=392×78×15×22.4=84L

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