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Q.

10ml of a mixture of H2 and O2 is exploded.  If the final volume of gas becomes 1ml, then the composition of original mixture may be,

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a

7mlH2,3mlO2

b

6mlH2,4mlO2

c

5mlH2,5mlO2

d

8mlH2,2mlO2

answer is B.

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Detailed Solution

H2+1/2O2H2O

1v       1/2v

 Left:   x  1/2   x

H2&O210ml

 Let vol. of H2 is x 

 Then vol. of O2 is 10-x

VFinal =Vinitial -(x+1/2x)

1=10-(3/2x)32x=9

x=6ml

H2 and O2 volumes are x and (10-x)

=    6    and    (10 – 6 )

=    6   and    4

 

 

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