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Q. $CH \equiv CH \ce{->[{HgSO_4}][{H_2SO_4}]A} \ce{->[{CH_3MgBr}][{H_2O}]B} \ce{->[p/Br_2]C}$. Here $C$ is:

Delhi UMET/DPMTDelhi UMET/DPMT 2005

Solution:

$\underset{\text{ethyne}}{CH \equiv CH} \ce{->[{HgSO_4}][{H_2SO_4}]\underset{(A) ethanal}{CH_3CHO}} \ce{->[CH_3MgBr]}$

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