Chemical bonding & molecular structure practice · Mixed difficulty

The correct decreasing order of the boiling points of ${H_2}O,\,\,HF$ and $N{H_3}$ is

Which of the following diatomic molecules would be stabilized by the removal of an electron?

Read the following statements and choose the correct option. Here T stands for True and F stands for False statement.

(i) The smaller the size of the cation and the larger the size of the anion, the greater the covalent character of an ionic bond.

(ii) The smaller the charge on the cation, the greater the covalent character of the ionic bond.

(iii) For cations of the same size and charge, the one, with electronic configuration $(n-1) d^n n s^0$, typical of transition metals, is more polarising than the one with a noble gas configuration, $n s^2 n p^6$, typical of alkali and alkaline earth metal cations.

Statement-1: The number of bonding electrons in $N_2$ and $N_2^{-}$is same.

Statement-2: The bond order and bond length of $N_2{ }^{+}$ and $N_2^{-}$are same.

Assertion : Ionic compounds tend to be non-volalite.

Reason : Inter ionic forces in these compounds are strong.

Consider the following statements.
I. Bond enthalpy increases as bond order decreases
II. Bond length decreases as bond order increases
III. There is a effect of electronegativity on bond energy
Select the correct statement (s).

The correct order of increasing bond angles in the following species is:

Bond energy of ${Cl}_2, {Br}_2$ and ${I}_2$ follow the order

Among the bonds formed by a chlorine atom with atoms of hydrogen, chlorine, sodium and carbon, the strongest bond is formed between

Statement-1: ${C}_2, {F}_2, {B}_2, {N}_2$ are diamagnetic species
Statement-2: Species with unpaired electrons only in anti bonding orbitals are paramagnetic

Statement-I: The geometry of $\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_3$ is tetrahedral.

Statement-II: Carbon of $\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_3$ is $\mathrm{sp}^2$ hybridized.

Which of the following shows minimum bond angle?

In ${He}_2$, the electrons in bonding and antibonding orbitals are

Which shows the least dipole moment?

The pair of species having identical shape of both species:

Which of the following is correct order of $\sigma$ bond strength
I) 2S – 2S II) 2S – 2P III) 2P – 2P IV) 3S – 3S

Which of the following molecules does not possess a permanent electric dipole moment?

Which of the following statements are correct?
(A) Both $\mathrm{LiCl}\,\,\mathrm{and}\,\,\mathrm{MgC}{\mathrm{l}_\mathrm{2}}$ are soluble in ethanol.
(B) The oxides $\mathrm{L}{\mathrm{i}_\mathrm{2}}\mathrm{O}\,\,\,\mathrm{and}\,\,\mathrm{MgO}$ combine with excess of oxygen to give superoxide.
(C) $\mathrm{LiF}$ is less soluble in water than other alkali metal fluorides.
(D) $\mathrm{L}{\mathrm{i}_2}\mathrm{O}$ is more soluble in water than other alkali metal oxides.
Choose the most appropriate answer from the options given below:

Choose the correct order

Among the following species, identify the isostructural pairs

$\mathrm{NF}_3, \mathrm{NO}_3^{-}, \mathrm{BF}_3, \mathrm{H}_3 \mathrm{O}^{+}, \mathrm{HN}_3$

According to MO theory

Bond angles of $\mathrm{N}{\mathrm{H}_3},\mathrm{P}{\mathrm{H}_3},\mathrm{As}{\mathrm{H}_3}$ and $\mathrm{Sb}{\mathrm{H}_3}$ is in the order

Which of the following has the lowest bond angle?

The maximum possible number of hydrogen bonds is a ${\mathrm{H}_2}\mathrm{O}$ molecule can participate is

In which of the following processes, the bond order is decreased?

The hybrid state of 1 and 3 carbon atoms in $C{H_2} = C = C{H_2}$

In a crystal cations and anions are held together by

In the transition of ${Zn}$ atoms to ${Zn}^{++}$ions there is a decrease in the

Which species does not exhibit paramagnetism?

Among the following the weakest one is