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Question

An electric discharge is passed through a mixture containing 50 c.c. of O2 and 50 c.c. of H2. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be


A
(i) 25 c.c. (ii) 50 c.c.
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B
(i) 50 c.c. (ii) 75 c.c.
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C
(i) 25 c.c. (ii) 75 c.c.
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D
(i) 75 c.c. (ii) 75 c.c.
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Solution

The correct option is C (i) 25 c.c. (ii) 75 c.c.
At room temperature 2H2(g)+O2(g)2H2Olt=050ml50ml0t=t502x50x2x=025 gases (50) liquid
In this case H2 is limiting reagent
x=25 ml
At 110C 2H2(g)+O2(g)2H2O(g)Vgas=75 mlt=t025ml2×50ml

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