Carbon dioxide formed after reaction with cupric oxide is tested by:

Caustic soda

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Quick lime

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Lime water

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Baking soda

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Solution

The correct option is C Lime water
The given organic compound is mixed wiht dry copper oxide (CuO) and heated in a hard glass tube. The products of the reaction are passed over (white) anhydrous copper sulfate and then bubbled through lime water. If copper sulfate turns blue due to the formation of $C u S O_{4} . 5 H_{2} O$ (by water vapour) then the compound contains hydrogen.
If lime water is turned milky by $C O_{2},$ then the compound contains carbon.
$C O_{2} + 2 C a (O H)_{2} Lime Water Δ ⟶ C a C O_{3} ↓ + H_{2} O$

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C O_{2}

C u O

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