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A compound with formula C(6)H(6)O(2) gav...

A compound with formula `C_(6)H_(6)O_(2)` gave methane on treatment with excess of MeMgBr, 5.5 g of this compound gave 2.24 litres of methane at STP. How many active hydrogens are present in the compound.

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The correct Answer is:
`002`
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