List - I List - II (A) CH 3 − C ≡ C − CH 3 → cis-2-butene (P) Na / NH 3 ( I ) (B) CH 3 − C ≡ C − CH 3 → trans-2-butene (Q) H 2 / Pd / BaSO 4 (C) CH 3 C ≡ C − CH 3 → 1 − Butyne (R) al

Question

List - I List - II (A) CH 3 ​ − C ≡ C − CH 3 ​ → cis-2-butene (P) Na / NH 3 ​ ( I ) (B) CH 3 ​ − C ≡ C − CH 3 ​ → trans-2-butene (Q) H 2 ​ / Pd / BaSO 4 ​ (C) CH 3 ​ C ≡ C − CH 3 ​ → 1 − Butyne (R) alc. KOH , Δ (D) CH 3 ​ − CH 3 ​ − C ≡ CH → 2 − Butyne (S) NaNH 2 ​ , D

TestHub · Accepted Answer

Question Explanation: Asking about the correct match between reactions of alkynes and reagents. Concept:

This question is based on

(a) Birch reduction

(b) Rosenmund reduction

(c) Isomerisation of alkynes

Solution:

List - I	List - II
(A) $CH_{3} - C \equiv C - CH_{3} \to$ cis-2-butene	(P) $Na / NH_{3} (I)$
(B) $CH_{3} - C \equiv C - CH_{3} \to$ trans-2-butene	(Q) $H_{2} / Pd / BaSO_{4}$
(C) $CH_{3} C \equiv C - CH_{3} \to 1 -$ Butyne	(R) alc. $KOH, Δ$
(D) $CH_{3} - CH_{3} - C \equiv CH \to 2 -$ Butyne	(S) $NaNH_{2}$ , D

Chemistry - Hydrocarbon Question with Solution | TestHub

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