Chemical bonding & molecular structure practice · Mixed difficulty

Which has the largest distance between the carbon hydrogen atom?

Which one has more tendency to form covalent compounds?

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?

Among $\mathrm{NaF,\;}\,\,\mathrm{NaCl,\;}\,\,\mathrm{NaBr\;}\,\,\mathrm{and\;}\,\,\mathrm{NaI,}$ the NaF has highest melting point because:

Electron deficient species are known as:

Covalent compounds are generally soluble in

Which of the following compounds would have the highest boiling point?

The half of the difference between the number of electrons in bonding molecular orbitals and antibonding molecular orbitals is known as:

For a stable molecule, the value of bond order must be

Which shows the least dipole moment?

From the molecular orbital theory, one can show that the bond order in ${\mathrm{F}_2}$ molecule as

Which of the following species has a bond order other than 3?

Consider the following molecules or ions (i) ${\mathrm{H}_2}\mathrm{O}$,(ii) $\mathrm{NH}_4^ +$,(iii) $\mathrm{SO}_4^{2 - }$,(iv) $\mathrm{ClO}_4^ -$,(v) $\mathrm{N}{\mathrm{H}_3}$,$s{p^3}$ hybridisation is involved in the formation of

The dipole moment of diatomic molecules ${AB}$ and $C D$ are 10.41 and 10.27 Debye respectively while there bond distances are $2.82 \mathop {\text{A}}\limits^ \circ$ and $2.67 \mathop {\text{A}}\limits^ \circ$ respectively then

The observed $\mathrm{O}-\mathrm{O}$ bond length in ozone molecule is

The number of anti-bonding electron pairs in ${O_2}^{2 - }$ ion is

The electronegativity of ${O}, {F}, {N}, {Cl}$ and ${H}$ are $3.5,4.0,3.2$, 3.0 and 2.1 respectively. The strongest bond will be:

Which of these statements is correct according to VBT?

$\% {~s}$-character of ${N}-{H}$ bond is maximum in :

The maximum valency of an element with atomic number 7 is

Oxidation state of three carbon atoms in ${C_3}{O_2}$ are

Which of the following molecular species has unpaired electron (s)?

Assertion (A): $\mathrm{CO}_2$ is resonance stabilized molecule.

Reason (R): Bond length of $\mathrm{C}-\mathrm{O}$ in $\mathrm{CO}_2$ is intermediate of single and double bond length.

Which of the following is false?

Which bond is more polar?

How many species do not exist?

$\begin{aligned} & {PH}_3, {PH}_5, {PCl}_5, {PBr}_5, {SiF}_6^{2-}, {SF}_6,{Al}_2{F}_6, {PbI}_4, \\ & {NCl}_5, {AlCl}_3,{OF}_2, {OH}_2, {OF}_4, {HFO}_4, {FeI}_3, {B}_2 {F}_6 \end{aligned}$

According to MO theory

The ICl molecule is:

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A) Dipole –dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.
Reason (R) Fluorine is the most electronegative element and hydrogen bonds in $HF$ are symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below.

Among the following compounds the one that is polar and has central atom with $s{p^2}$-hybridisation is: