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Liquid benzene `(C_6H_6)` burns in oxygen according to `2C_6H_6(1)+15O_2(g)rarr12CO_2(g)+6H_2O_(g)` How many litres of `O_2` at STP are needed for complete conbustion of39 gm of liquid benzene?A. 11.2 litresB. 74 litresC. 84 litresD. 22.4 litres

Answer» Correct Answer - C
`2C_6H_6+15O_2rarr12CO_2+6H_2O`
`2xx78gmimplies15xx22.4` litre of `O_2` at STP
`39gmimplies(15xx22.4xx39)/(2.79)=84` litre


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