40 cm 3
20 cm 3
30 cm 3
10cm 3
5cm 3
Correct answer is D
2H2 + O2 ------2H2O 2V 1V 2V 20cm3 20cm3 ------- 20cm3 10cm3 20cm3 Residual gas = 20cm3 - 10cm3 of 02 = 103
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