MCQ
Which of the following compound has maximum boiling point
- ✓$n- $ hexane
- B$n- $ pentane
- C$2, 2- $ dimethyl propane
- D$2- $ methyl butane
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$2A{B_3}(g) \rightleftharpoons {A_2}(g) + 3{B_2}(g)$. At equilibrium, $2\, mol$ of $A_2$ are found to be present. The equilibrium constant of this reaction is

| Column $-I$ | Column $-II$ |
| $(i)$ $n-$ Butane $\to 2-$ methyl propane | $(A)$ Free redical substitution |
| $(ii)$ $C{H_4} + C{l_2} \xrightarrow{{hv}} C{H_3} + Cl$ | $(B)$ Wurtz reaction |
| $(iii)$ $R - COONa\xrightarrow{{soda - \lim e}}R - H$ | $(C)$ Isomerism |
| $(iv)$ $R - X + Na\xrightarrow{{{\text{E}}ther}}R - R$ | $(D)$ De-carboxylation |