Question

Match List-1 with List-2:

Column 1	Column 2
Alcoholic potassium hydroxide	Electrode in batteries
$\mathrm{Pd}/{\mathrm{BaSO}}_4$	Obtained by addition reaction
BHC(benzene hexachloride)	Used for $\mathrm{\beta }$-elimination reaction
Polyacetylene	Lindlar's catalyst

Answer 1

Alcoholic potassium hydroxide: Alcoholic $\mathrm{KOH}$ abstract hydrogen and gives an elimination reaction. A special type of reaction proceeds via this reagent called beta elimination.

$\mathbf{Pd}\mathbf{/}{\mathbf{BaSO}}_{\mathbf{4}}$: A heterogeneous catalyst called Lindlar's catalyst is made of palladium that has been placed on calcium carbonate or barium sulfates, which has subsequently been poisoned with different types of lead or sulphur.

BHC: A chlorine or bromine atom is added to each carbon atom, irreversibly breaking the ring's delocalization. For instance, 1,2,3,4,5,6-hexachlorocyclohexane or benzene hexachloride is produced by bubbling chlorine gas through hot benzene that has been exposed to UV radiation for an hour. structure of BHC is given-

Polyacetylene: The electrodes in an organic battery are polyacetylene.

Final Answer: Hence, the correct match is given as-

List-1	List-2
Alcoholic KOH	Used for beta–elimination reaction
Pd / BaSO4	Lindlar’s catalyst
BHC (Benzene hexachloride)	Addition product of benzene and chlorine
Polyacetylene	Used in electrodes in batteries