MCQ
Which element has the highest electronegativity
- A$C$
- B$Mg$
- ✓$O$
- D$S$
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| List $-I$ (Chemicals) | List $-II$ (Use / Preparation / Constituent) |
| $(a)$ Alcoholic potassium hydroxide | $(i)$ Electrodes in batteries |
| $(b)$ $Pd / BaSO _{4}$ | $(ii)$ Obtained by addition reaction |
| $(c)$ $BHC$ (Benzene hexachloride) | $(iii)$ Used for $\beta$ - elimination reaction |
| $(d)$ Polyacetylene | $(iv)$ Lindlar's catalyst |
Choose the most appropriate match
