A) 250 ml
B) 300 ml
C) 150 ml
D) 200 ml
Correct Answer: B
Solution :
Quantity of \[{{\text{H}}_{\text{2}}}\text{=15}\,\,\text{ml}\] and volume of \[{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\text{=20}\] We know that 20 volume of \[{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\] means 1 litre of this solution will give 20 litre of oxygen at N.T.P. Since, oxygen liberated from 1000 ml (1 litre) of \[{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\text{=}\,\,\text{20}\,\] litre, therefore, oxygen liberated from 15 ml of \[{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\] \[=\frac{20}{1000}\times 15=0.3\,\text{litre}\,\,\text{=}\,\text{300}\,\text{ml}\text{.}\]
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