NEET M.O.T Practice Questions With Solutions

NEET Chemistry M.O.T Practice Questions

Biology Physics

Question 1.

Identify the correct orders against the property mentioned:

A\(\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{CHCl}_3 -\text { }\)dipole moment

B\(\mathrm{XeF}_4>\mathrm{XeO}_3>\mathrm{XeF}_2-\text { }\)number of lone pairs on central atom

C\(\mathrm{O}-\mathrm{H}>\mathrm{C}-\mathrm{H}>\mathrm{N}-\mathrm{O}-\text { }\) bond length

D\(\mathrm{N}_2>\mathrm{O}_2>\mathrm{H}_2 \text { } -\) bond enthalpy

Question 2.

Which one of the following molecules is paramagnetic?

A\(\mathrm{H}_2\)

B\(\mathrm{Li}_2\)

C\(\mathrm{C_2}\)

D\(\mathrm{O}_2\)

Question 3.

The correct order of energies of molecular orbitals of N ₂ molecule is:

A\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\)
\(\sigma^* 2 s<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma 2 p_z<\sigma^* 2 p_z\)

B\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\)
\(\left(\pi 2 p_x=\pi 2 p_y\right)< \)
\(\sigma 2 p_z<\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)

C\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z<\)
\( \left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)

D\( \sigma \text { 1s }<\sigma^* \text { 1s }\)
\(<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z< \)
\( \sigma^* 2 p_z<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right) \)

Question 4.

Which one of the following statements is incorrect related to Molecular Orbital Theory?

AThe \(\pi^*\) antibonding molecular orbital has a node between the nuclei.

BIn the formation of a bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other.

CMolecular orbitals obtained from \(2P_x\) and \(2P_y\) orbitals are symmetrical around the bond axis.

DA \(\pi-\)bonding molecular orbital has larger electron density above and below the internuclear axis.

Question 5.

Which one of the following is the correct order of decreasing bond enthalpies for the given species?

A\(\mathrm {O^{2-}_2>O^-_2>O_2>N_2 }\)

B\(\mathrm {N_2>O_2>O^{2-}_2>O^-_2 }\)

C\(\mathrm {N_2>O_2>O^-_2>O^{2-}_2 }\)

D\(\mathrm {O_2>N_2>O^-_2>O^{2-}_2 }\)

Question 6.

Identify the incorrect statement among the following options:

A\(O^+_2\) ion is diamagnetic.

BThe bond orders of \(O_2^{+},O_2,O^-_2\) and \(O_2^{2-}\) are 2.5, 2, 1.5, and 1, respectively.

C\(C_2\) molecule has four electrons in its two degenerate \(\pi \) molecular orbitals.

D\(H^+_2 \) ion has one electron.

Question 7.

A molecule that cannot exist is:

{Li}_{2}

C_{2}

O_{2}

{He}_{2}

Question 8.

A diatomic molecule, among the following species, that only has

π

bonds according to the Molecular Orbital Theory (MOT) is:

ABe₂

BO₂

CN₂

DC₂

Question 9.

Which of the following is a paramagnetic compound?

N_{2}

H_{2}

{Li}_{2}

O_{2}

Question 10.

Consider the following species:
CN ⁺ , CN ^- , NO and CN
The highest bond order associated with:

ANO

BCN^–

CCN⁺

DCN

Question 1.

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

A\(\mathrm{O}^{2+}_2>\mathrm{O}^+_2>\mathrm{O}^-_2\)

B\(\mathrm{O}^{2+}_2<\mathrm{O}^-_2<\mathrm{O}^+_2\)

C\(\mathrm{O}^{+}_2>\mathrm{O}^-_2<\mathrm{O}^{2+}_2\)

D\(\mathrm{O}^{-}_2<\mathrm{O}^+_2>\mathrm{O}^{2+}_2\)

Question 2.

The decreasing order of stability of

O_{2}, O_{2}^{-}, O_{2}^{+}

and

O_{2}^{2 -}

is:

O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}

O_{2}^{2 -} > O_{2}^{-} > O_{2} > O_{2}^{+}

O_{2} > O_{2}^{+} > O_{2}^{2 -} > O_{2}^{-}

O_{2}^{-} > O_{2}^{2 -} > O_{2}^{+} > O_{2}

Question 3.

A paramagnetic molecule among the following is:

AO₂^–

BCN^–

CNO⁺

DCO

Question 4.

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.

AO₂^– < NO < C₂^2–< He₂⁺

BC₂^2–< He₂⁺ < O₂^–< NO

CHe₂⁺ < O₂^–< NO < C₂^2–

DNO < O₂^– < C₂^2– < He₂⁺

Question 5.

The bond order of 1.5 is shown by:

A\(\text O^+_2\)

B\(\text O^-_2\)

C\(\text O^{2-}_2\)

D\(\text O_2\)

Question 6.

The pair of species with the same bond order is:

O_{2}^{2 -},

B_{2}

O_{2}^{+}, {NO}^{+}

C\(\text {NO, CO}\)

N_{2}, O_{2}

Question 7.

Which orbital does the additional electron occupy when O₂ is converted to the O₂⁻ ion?

π

orbital

σ *

orbital

σ

orbital

π *

orbital

Question 8.

Which of the following has the minimum bond length?

O_{2}^{-}

O_{2}^{2 -}

O_{2}

O_{2}^{+}

Question 9.

A molecule/ion among the following species that does not exist under normal conditions is:

A\(Be^+_2\)

B\(Be_2\)

C\(B_2\)

D\(Li_2\)

Question 10.

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:

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NEET M.O.T Practice Questions With Solutions

NEET Chemistry M.O.T Practice Questions

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

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