Lindlar's catalyst cannot be used to carry out the following process
a) ${CH}_{3} - C \equiv C - {CH}_{3} \overset{H_{2}}{⟶}$ trans Butene-2
b) ${CH}_{3} - C = C - {CH}_{3} \overset{H_{2}}{⟶}$ Butane
c) $C_{2} H_{2} \overset{2 H_{2}}{⟶} C_{2} H_{6}$
d) ${CH}_{3} - C \equiv C - {CH}_{3} \overset{H_{2}}{⟶}$ cis Butene-2

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a only

a, b and d only

a, b and c only

a, c and d only

answer is A.

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Detailed Solution

The reactions are as follows:

a) ${CH}_{3} - C \equiv C - {CH}_{3} \overset{Na in liq . {NH}_{3}}{⟶}$ trans Butene-2

b) ${CH}_{3} - C = C - {CH}_{3} \overset{Pt}{⟶}$ Butane

c) $C_{2} H_{2} \overset{Pt or Ni}{⟶} C_{2} H_{6}$

d) ${C H}_{3} - C \equiv C - {C H}_{3} \overset{P d - B a S O_{4}}{⟶}$ cis Butene-2

Hence the correct option is (A).

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