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| Catalyst | Process |
| $(i) \;\mathrm{Na}_{2} \mathrm{O}$ | $(a)$ The oxidation of ethyne to ethanal |
| $(ii) \;\mathrm{TiCl}_{4}+ \mathrm{Al(CH_3)}_{3}$ | $(b)$ Polymerisation of alkynes |
|
$(iii)\;\mathrm{PdCl_2} $ |
$(c)$ Oxidation of $SO_2$ in the manufacture of $H_2SO_4$ |
| $(iv)\;$Nickel complexes | $(d)$ Polymerisation of ethylene |
Which of the following is the correct option ?
Statement $(I)$ : Aminobenzene and aniline are same organic compounds.
Statement $(II)$ : Aminobenzene and aniline are different organic compounds.
In the light of the above statements, choose the most appropriate answer from the options given below:
$A$. A liquid evaporates to vapour.
$B$. Temperature of a crystalline solid lowered from $130 \mathrm{~K}$ to $0 \mathrm{~K}$.
$C$. $2 \mathrm{NaHCO}_{3(\mathrm{~s})} \rightarrow \mathrm{Na}_2 \mathrm{CO}_{3(\mathrm{~s})}+\mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})}$
$D$. $\mathrm{Cl}_{2(g)} \rightarrow 2 \mathrm{Cl}_{(g)}$
Choose the correct answer from the options given below: