Chemical bonding & molecular structure practice · Mixed difficulty

In which of the following ionisation processes, the bond order has increased and the magnetic behaviour has changed

Which of the following molecules has the maximum dipole moment

Barium ions, $\mathrm{CN}^{-}$and $\mathrm{Co}^{+2}$ form an ionic complex. If this complex is $75 \%$ ionized in aqueous solution with Vant Hoff factor(i) equal to four and paramagnetic moment is found to be $1.73 \mathrm{BM}$ (due to spin only) then hybridization state of $\mathrm{Co}(\mathrm{II})$ in the complex will be

Which among the following is/are paramagnetic in nature?

Which amongst the following is incorrect statement?

Which of the following halogens has the highest bond energy

Two elements $X$ and $Y$ have following electronic configuration
$X = 1{s^2}\,2{s^2}2{p^6}\,\,3{s^2}3{p^6}\,\,4{s^2}$
$Y = 1{s^2}\,2{s^2}2{p^6}\,\,3{s^2}3{p^5}\,$
The expected compound formed by combination of $X$ and $Y$ will be expressed as

The bond order of $\mathrm{CO}$ molecule on the basis of molecular orbital theory is:

Some of the properties of the two species, $\mathrm{NO}_3^ -$ and ${\mathrm{H}_3}{\mathrm{O}^ + }$ are described below. Which one of them is correct?

Which bond in a molecule of ethyl magnesium bromide is ionic in nature?

The hybridisation state of carbon in fullerene is

Which of the following statement is not true

Decreasing order of bond angle is

Bond order of $N_2^{+}$and $N_2^{-}$are same. Which relation is correct for $N_2^{+}$and $N_2^{-}?$

Which does not contain sigma bond:

Assertion : ${ClF}_3$ has $\mathrm{T}$-shape structure.

Reason : It has two lone pair arrange at $180^{\circ}$ (Angle).

Which of the following is diamagnetic

The decreasing order of bond dissociation energies of $\mathrm{C}-\mathrm{C}, \mathrm{C}-\mathrm{H}$ and $\mathrm{H}-\mathrm{H}$ bonds in

Assertion: Hydrogen bonding is responsible for the unique properties of water, such as its high boiling point and density.

Reason: Hydrogen bonding is a type of intermolecular force that occurs between molecules containing polar covalent bonds, resulting in strong attractive forces.

Assertion (A): The order of thermal stability of

$\mathrm{Li}_2 \mathrm{CO}_3< \mathrm{Na}_2 \mathrm{CO}_3< \mathrm{K}_2 \mathrm{CO}_3< \mathrm{Rb}_2 \mathrm{CO}_3< \mathrm{Cs}_2 \mathrm{CO}_3$

Reason (R): As we go

$\mathrm{Li}_2 \mathrm{CO}_3 \rightarrow \mathrm{Na}_2 \mathrm{CO}_3 \rightarrow \mathrm{~K}_2 \mathrm{CO}_3 \rightarrow \mathrm{Rb}_2 \mathrm{CO}_3 \rightarrow \mathrm{Cs}_2 \mathrm{CO}_3$

ionic character of carbonates increases.

Given below are two statements:

Assertion (A): Double bond in carbon molecule $\left(C_2\right)$ is consist of two pi-bonds.

Reason (R): Due to presence of four electrons in two pi-molecular orbitals.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following has the highest dipole moment

$\mathrm{HCl}$ molecule in the vapour state is an example of:

In which of the following hydrogen bond is present?

The lowest bond order present in :

Which of the following sets of species does not follow octet rule?

Dipole-dipole interaction energy between stationary polar molecules is proportional to

${\mathrm{N}_2}$ and ${\mathrm{O}_2}$ are converted into monocations, $\mathrm{N}_2^ +$ and $\mathrm{O}_2^ +$ respectively. Which of the following is wrong?

Which has the highest bond energy?

Which of the following has least bond energy?