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Question

(C) : Acidic strength increases down the group $(HCl < HBr < HI)$ due to decreasing bond dissociation energy. Reducing property also follows the same

Vedclass · Accepted Answer

Dipole moment of $CH_3Cl > CH_3F$ but the reverse is true for their $H\hat{C}H$ bond angle.

Vedclass · Answer

(C) : Acidic strength increases down the group $(HCl $B$: Basic strength depends on the availability of the lone pair. As the size of the central atom increases $(P  AsH_3)$. Bond angle decreases as the electronegativity of the central atom decreases $(PH_3 > AsH_3)$. Thus,the statement is incorrect.$C$: Dipole moment of $CH_3Cl$ $(1.86 \ D)$ is greater than $CH_3F$ $(1.85 \ D)$ due to the larger bond length in $C-Cl$. The $H\hat{C}H$ bond angle in $CH_3F$ is larger than in $CH_3Cl$ because $F$ is more electronegative,pulling electron density and increasing $s$-character in $C-H$ bonds. Thus,the statement is correct.$D$: Maleic acid (cis-isomer) has higher $K_{a_1}$ due to intramolecular hydrogen bonding in the monoanion,but lower $K_{a_2}$ due to electrostatic repulsion between carboxylate groups. Fumaric acid (trans-isomer) shows the reverse. Thus,the statement is incorrect.

Select the correct statement$(s)$.

Similar Questions

Which of the following molecules has the maximum dipole moment?

Arrange the following molecules from most to least polar ($I$,$II$,$III$,$IV$,$V$ respectively): $CH_4$,$CF_2Cl_2$,$CF_2H_2$,$CCl_4$,$CCl_2H_2$.

If $B-Cl$ bond has a dipole moment,explain why $BCl_3$ molecule has zero dipole moment.

Which one of the following molecules has a zero dipole moment?

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