Chemical Bonding and Molecular Structure

Amongst $\mathrm{BeF_2}$, $\mathrm{BF_3}$, $\mathrm{H_2O}$, $\mathrm{NH_3}$, $\mathrm{CCl_4}$ and HCl, the number of molecules with non-zero net dipole moment is ______.

Consider the ions/molecule
$$\mathrm{O_2^+,\ O_2,\ O_2^-,\ O_2^{2-}}$$
For increasing bond order the correct option is :

The correct order of melting points of hydrides of group 16 elements is :

Amongst $\mathrm{SF_4}$, $\mathrm{XeF_4}$, $\mathrm{CF_4}$ and $\mathrm{H_2O}$, the number of species with two lone pairs of electrons is ______.

Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List - II and select the most appropriate option.

Identify the incorrect statement for $\mathrm{PCl_5}$ from the following.

The correct order of increasing intermolecular hydrogen bond strength is

The hybridization of P exhibited in $\mathrm{PF_5}$ is sp$^x$d$^y$. The value of $y$ is ______

In the structure of $\mathrm{SF_4}$, the lone pair of electrons on S is in.

Arrange the following in the decreasing order of their covalent character :

(A) LiCl

(B) NaCl

(C) KCl

(D) CsCl

Choose the most appropriate answer from the options given below :

Consider the species $\mathrm{CH_4}$, $\mathrm{NH_4^+}$ and $\mathrm{BH_4^-}$. Choose the correct option with respect to the there species.

Number of lone pair(s) of electrons on central atom and the shape of $\mathrm{BrF_3}$ molecule respectively, are

Amongst the following, the number of molecule/(s) having net resultant dipole moment is ______.

$\mathrm{NF_3}$, $\mathrm{BF_3}$, $\mathrm{BeF_2}$, $\mathrm{CHCl_3}$, $\mathrm{H_2S}$, $\mathrm{SiF_4}$, $\mathrm{CCl_4}$, $\mathrm{PF_5}$

The geometry around boron in the product 'B' formed from the following reaction is

$$\mathrm{BF_3+NaH\xrightarrow{450\ K}A+NaF}$$
$$\mathrm{A+NMe_3\rightarrow B}$$

Among the following species

$\mathrm{N_2}$, $\mathrm{N_2^+}$, $\mathrm{N_2^-}$, $\mathrm{N_2^{2-}}$, $\mathrm{O_2}$, $\mathrm{O_2^+}$, $\mathrm{O_2^-}$, $\mathrm{O_2^{2-}}$

the number of species showing diamagnesim is ______.

The number of sp$^3$ hybridised carbons in an acyclic neutral compound with molecular formula $\mathrm{C_4H_5N}$ is ______.

Match List I with List II :

Choose the correct answer from the options given below:

The sum of number of lone pairs of electrons present on the central atoms of $\mathrm{XeO_3}$, $\mathrm{XeOF_4}$ and $\mathrm{XeF_6}$, is ______

Match List - I with List - II.

Choose the correct answer from the options given below :

Arrange the following in increasing order of their covalent character.

A. $\mathrm{CaF_2}$
B. $\mathrm{CaCl_2}$
C. $\mathrm{CaBr_2}$
D. $\mathrm{CaI_2}$

Choose the correct answer from the options given below.