Which of the following statements is correct?

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(C) $1$. Mercurous ion is $Hg_2^{2+}$,which has a $d^{10}s^0$ configuration with paired electrons,making it diamagnetic. Mercuric ion is $Hg^{2+}$,whi

Vedclass · Accepted Answer

Both $(A)$ and $(B)$ are correct.

Vedclass · Answer

(C) $1$. Mercurous ion is $Hg_2^{2+}$,which has a $d^{10}s^0$ configuration with paired electrons,making it diamagnetic. Mercuric ion is $Hg^{2+}$,which has a $d^{10}$ configuration,also making it diamagnetic. Thus,statement $(A)$ is correct.$2$. $SnCl_2$ is an ionic compound with a high melting point,whereas $SnCl_4$ is a covalent compound with a low melting point. Thus,$SnCl_2 > SnCl_4$ regarding melting point is correct. Statement $(B)$ is correct.$3$. In $H_3O^{+}$,there are three covalent bonds and one coordinate covalent bond (dative bond). Thus,statement $(D)$ is incorrect.$4$. Since both $(A)$ and $(B)$ are correct,the correct option is $(C)$.

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