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90 gm mixture of H(2) and O(2) is taken...

90 gm mixture of `H_(2)` and `O_(2)` is taken In stoichiometric ratio and
gives `H_(2)O` with 50% yield. The produced mass of `H_(2)O` (in gm) is :

A

45 gm

B

36 gm

C

20 gm

D

90 gm

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The correct Answer is:
A
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