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Question

In the reaction given below, one mole of CrO5 will liberate how many moles of oxygen?

CrO5+H2SO4Cr2(SO4)3+H2O+O2

A
52
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B
54
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C
92
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D
74
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Solution

The correct option is D 74
2CrO5+3H2SO4Cr2(SO4)3+3H2O+72O2
1 mole of CrO5 gives 0.5 moles of Cr2(SO4)3 for which it requires 1.5 moles of H2SO4.
Moles of O2 formed =74.

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