Hydrocarbons 2 Question 33
34. When propyne is treated with aqueous $\mathrm{H}{2} \mathrm{SO}{4}$ in the presence of $\mathrm{HgSO}_{4}$, the major product is
$(1983,1 \mathrm{M})$
(a) propanal
(b) propyl hydrogen sulphate
(c) acetone
(d) propanol
$(1983,1 M)$
(a) only $s p$-hybridised carbon atoms
(b) only $s p^{2}$-hybridised carbon atoms
(c) both $s p$ and $s p^{2}$-hybridised carbon atoms
(d) $s p, s p^{2}$ and $s p^{3}$-hybridised carbon atoms
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Answer:
Correct Answer: 34. $(a, b, d)$
Solution:
- Alkynes undergo Markownikoff’s addition of water in the presence of $\mathrm{H}{2} \mathrm{SO}{4} / \mathrm{HgSO}_{4}$ :
