| Column-$I$ उत्प्रेरक | Column-$II$ उत्पाद |
| $(a)$ $V_2O_5$ | $(i)$ पॉलीएथिलीन |
| $(b)$ $TiCl_4/Al(Me)_3$ | $(ii)$ एथेनल |
| $(c)$ $PdCl_2$ | $(iii)$ $H_2SO_4$ |
| $(d)$ आयरन ऑक्साइड | $(iv)$ $NH_3$ |
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