7.5 ml of a gaseous hydrocarbon was exploded with 36 ml of O2. On cooling,the volume of gases was found to be 28.5ml ,15 ml of which was absorbed by KOH and the rest was absorbed in a solution of alkaline pyrogallol .The formula of the hydrocarbon

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5ml of a gaseous hydrocarbon $(C_{x} H y)$ was exploded with 30 ml of oxygen. The resulting gas on cooling to room temperature is found to measure 25ml of which 10ml are absorbed by NaOH and the remainder by Pyrogallol. The value of x + y is?___

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40 m L

gaseous mixture of

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C H_{4}

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