MCQ
$A$ is


- ✓

- B

- C

- D








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|
List-$I$ (Molecule) |
List-$II$. (Number and types of bond/s between two carbon atoms) |
| $A$. ethane | $I$. one $\sigma$-bond and two $\pi$-bonds |
| $B$. ethene | $II$. two $\pi$-bonds |
| $C$. carbon molecule, $\mathrm{C}_2$ | $III$. one $\sigma$-bond |
| $D$. ethyne | $IV$. one $\sigma$-bond and one $\pi$-bond |
Choose the correct answer from the options given below:
$(I)\,\,Ph-CH=CH-COOH$
$(II)\,\,p-NO_2-C_6H_4-CH=CH-COOH$
$(III)\,\,p-MeO-C_6H_4-CH=CH-COOH$
$(IV)\,\,p-Cl-C_6H_4-CH=CH-COOH$
The total number of methyl $\left(- CH _3\right)$ group($s$) in compound $S$ is. . . .