AP and TS EAMCET Medical Model Paper 10

'X' mL of water gas (CO+H2) at 273 K and 1 bar pressure is burnt with excess of O2 (Y mL). The gas reaction mixture is passed into concentrated H2SO4. The mass decreases by 0.09 g. The remaining gas mixture is passed into KOH. Volume of gas decreases by 136.5 mL under similar conditions. 'X' is