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Explore popular questions from Chemical Bonding and Molecular Structure for NEET. This collection covers Chemical Bonding and Molecular Structure previous year NEET questions hand picked by experienced teachers.

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Chemical Bonding and Molecular Structure

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Q 1. The species, having bond angles of {tex} 120 ^ { \circ } {/tex} is

A

{tex} \mathrm { ClF } _ { 3 } {/tex}

B

{tex} \mathrm { NCl } _ { 3 } {/tex}

{tex} \mathrm { BCl }_3 {/tex}

D

{tex} \mathrm { PH } _ { 3 } {/tex}

Explanation



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Q 2. Which of the following pairs of compounds is isoelectronic and isostructural?

A

{tex} \mathrm { TeI } _ { 2 } , \mathrm { XeF } _ { 2 } {/tex}

{tex} \mathrm { IBr } _ { 2 } ^ { - } , \mathrm { XeF } _ { 2 } {/tex}

C

{tex} \mathrm { IF } _ { 3 } , \mathrm { XeF } _ { 2 } {/tex}

D

{tex} \mathrm { BeCl } _ { 2 } , \mathrm { XeF } _ { 2 } {/tex}

Explanation

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Q 3. Which one of the following pairs of species have the same bond order?

A

{tex} \mathrm { O } _ { 2 } , \mathrm { NO } ^ { + } {/tex}

{tex} \mathrm { CN } ^ { - } , \mathrm { CO } {/tex}

C

{tex} \mathrm { N } _ { 2 } , \mathrm { O } _ { 2 } ^ { - } {/tex}

D

{tex} \mathrm { CO } , \mathrm { NO } {/tex}

Explanation


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Q 4. Which one of the following compounds shows the presence of intramolecular hydrogen bond?

A

{tex} \mathrm { H } _ { 2 } \mathrm { O } _ { 2 } {/tex}

B

{tex} \mathrm { HCN } {/tex}

Cellulose

D

Concentrated acetic acid

Explanation


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Q 5. The hybridizations of atomic orbitals of nitrogen in {tex} \mathrm { NO } _ { 2 } ^ { + } , \mathrm { NO } _ { 3 } ^ { - } {/tex} and {tex} \mathrm { NH } _ { 4 } ^ { + } {/tex} respectively are

A

{tex} s p , s p ^ { 3 } {/tex} and {tex} s p ^ { 2 } {/tex}

B

{tex} s p _ { 2 } ^ { 2 } , s p ^ { 3 } {/tex} and {tex} s p _ { 2 } {/tex}

{tex} s p , s p ^ { 2 } {/tex} and {tex} s p ^ { 3 } {/tex}

D

{tex} s p ^ { 2 } , s p {/tex} and {tex} s p ^ { 3 } {/tex}

Explanation


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Q 6. Which of the following pairs of ions is isoelectronic and isostructural?

{tex} \mathrm { CO } _ { 3 } ^ { 2 - } , \mathrm { NO } _ { 3 } ^ { - } {/tex}

B

{tex} \mathrm { ClO } _ { 3 } ^ { - } , \mathrm { CO } _ { 3 } ^ { 2 - } {/tex}

C

{tex} \mathrm { SO } _ { 3 } ^ { 2 - } , \mathrm { NO } _ { 3 } ^ { - } {/tex}

D

{tex} \mathrm { ClO } _ { 3 } ^ { - } , \mathrm { SO } _ { 3 } ^ { 2 - } {/tex}

Explanation


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Q 7. The correct geometry and hybridization for {tex} \mathrm { XeF } _ { 4 } {/tex} are

octahedral, {tex} s p ^ { 3 } d ^ { 2 } {/tex}

B

trigonal bipyramidal, {tex} s p ^ { 3 } d {/tex}

C

planar triangle, {tex} s p ^ { 3 } d ^ { 5 } {/tex}

D

square planar, {tex} s p ^ { 3 } d ^ { 2 } {/tex}

Explanation

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Q 8. Among the following, which one is a wrong statement?

A

{tex} \mathrm { PH } _ { 5 } {/tex} and {tex} \mathrm { BiCl } _ { 5 } {/tex} do not exist.

B

{tex} p \pi - d \pi {/tex} bonds are present in {tex} \mathrm { SO } _ { 2 } {/tex}

{tex} \mathrm { SeF } _ { 4 } {/tex} and {tex} \mathrm { CH } _ { 4 } {/tex} have same shape.

D

{tex} \mathrm { I } _ { 3 } ^ { + } {/tex} has bent geometry

Explanation

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Q 9. Which of the following pairs of compounds is isoelectronic and isostructural?

A

{tex} \mathrm { TeI } _ { 2 } , \mathrm { XeF } _ { 2 } {/tex}

B

{tex} \mathrm { IBr } _ { 2 } ^ { - } , \mathrm { XeF } _ { 2 } {/tex}

C

{tex} \mathrm { IF } _ { 3 } , \mathrm { XeF } _ { 2 } {/tex}

{tex} \mathrm {None} {/tex}

Explanation

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Q 10. The species, having bond angles of {tex} 120 ^ { \circ } {/tex} is

A

{tex} \mathrm { ClF } _ { 3 } {/tex}

B

{tex} \mathrm { NCl } _ { 3 } {/tex}

{tex} \mathrm { BCl }_{3}{/tex}

D

{tex} \mathrm { PH } _ { 3 } {/tex}

Explanation


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Q 11. Which one of the following pairs of species have the same bond order?

A

{tex} \mathrm { O } _ { 2 } , \mathrm { NO } ^ { + } {/tex}

{tex} \mathrm { CN } ^ { - } , \mathrm { CO } {/tex}

C

{tex} \mathrm { N } _ { 2 } , \mathrm { O } _ { 2 } ^ { - } {/tex}

D

{tex} \mathrm { CO } , \mathrm { NO } {/tex}

Explanation




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Q 12. Which one of the following compounds shows the presence of intramolecular hydrogen bond?

A

{tex} \mathrm { H } _ { 2 } \mathrm { O } _ { 2 } {/tex}

B

{tex} \mathrm { HCN } {/tex}

{tex} \mathrm {Cellulose} {/tex}

D

{tex} \mathrm {Concentrated \ acetic\ acid} {/tex}

Explanation


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Q 13. The hybridizations of atomic orbitals of nitrogen in {tex} \mathrm { NO } _ { 2 } ^ { + } , \mathrm { NO } _ { 3 } ^ { - } {/tex} and {tex} \mathrm { NH } _ { 4 } ^ { + } {/tex} respectively are

A

{tex} s p , s p ^ { 3 } {/tex} and {tex} s p ^ { 2 } {/tex}

B

{tex} s p ^ { 2 } , s p ^ { 3 } {/tex} and {tex} s p {/tex}

{tex} s p , s p ^ { 2 } {/tex} and {tex} s p ^ { 3 } {/tex}

D

{tex} s p ^ { 2 } , s p {/tex} and {tex} s p ^ { 3 } {/tex}

Explanation


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Q 14. Which of the following pairs of ions is isoelectronic and isostructural?

{tex} \mathrm { CO } _ { 3 } ^ { 2 - } , \mathrm { NO } _ { 3 } ^ { - } {/tex}

B

{tex} \mathrm { ClO } _ { 3 } ^ { - } , \mathrm { CO } _ { 3 } ^ { 2 - } {/tex}

C

{tex} \mathrm { SO } _ { 3 } ^ { 2 - } , \mathrm { NO } _ { 3 } ^ { - } {/tex}

D

{tex} \mathrm { ClO } _ { 3 } ^ { - } , \mathrm { SO } _ { 2 } ^ { 2 - } {/tex}

Explanation


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Q 15. Which of the following is electron-deficient?

{tex} \left( \mathrm { BH } _ { 3 } \right) _ { 2 } {/tex}

B

{tex} \mathrm { PH } _ { 3 } {/tex}

C

{tex} \left( \mathrm { CH } _ { 3 } \right) _ { 2 } {/tex}

D

{tex} \left( \mathrm { SiH } _ { 3 } \right) _ { 2 } {/tex}

Explanation


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Q 16. Which of the following species contains three bond pairs and one lone pair around the central atom?

A

{tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex}

B

{tex} \mathrm { BF } _ { 3 } {/tex}

C

{tex} \mathrm { NH } _ { 2 }^{-} {/tex}

{tex} \mathrm { PCl } _ { 3 } {/tex}

Explanation

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Q 17. The pair of species with the same bond order is

{tex} \mathrm { O } _ { 2 } ^ { 2 - } , \mathrm { B } _ { 2 } {/tex}

B

{tex} \mathrm { O } _ { 2 } ^ { + } , \mathrm { NO } ^ { + } {/tex}

C

{tex} \mathrm { NO } , \mathrm { CO } {/tex}

D

{tex} \mathrm { N } _ { 2 } , \mathrm { O } _ { 2 } {/tex}

Explanation

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Q 18. Some of the properties of the two species, {tex} \mathrm { NO } _ { 3 } ^ { - } {/tex} and {tex} \mathrm { H } _ { 3 } \mathrm { O } ^ { + } {/tex} are described below. Which one of them is correct?

Dissimilar in hybridization for the central atom with different structures.

B

Isostructural with same hybridization for the central atom.

C

Isostructural with different hybridization for the central atom.

D

Similar in hybridization for the central atom with different structures.

Explanation


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Q 19. What is the dominant intermolecular force or bond that must be overcome in converting liquid {tex} \mathrm { CH } _ { 3 } \mathrm { OH } {/tex} to a gas?

A

Dipole-dipole interaction

B

Covalent bonds

C

London dispersion force

Hydrogen bonding

Explanation


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Q 20. According to MO theory which of the lists ranks the nitrogen species in terms of increasing bond order?

{tex} \mathrm { N } _ { 2 } ^ { 2 - } < \mathrm { N } _ { 2 } ^ { - } < \mathrm { N } _ { 2 } {/tex}

B

{tex} \mathrm { N } _ { 2 } < \mathrm { N } _ { 2 } ^ { 2 - } < \mathrm { N } _ { 2 } ^ { - } {/tex}

C

{tex} \mathrm { N } _ { 2 } ^ { - } < \mathrm { N } _ { 2 } ^ { 2 - } < \mathrm { N } _ { 2 } {/tex}

D

{tex} \mathrm { N } _ { 2 } ^ { - } < \mathrm { N } _ { 2 } < \mathrm { N } _ { 2 } ^ { 2 - } {/tex}

Explanation


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Q 21. {tex} \mathrm { N } _ { 2 } {/tex} and {tex} \mathrm { O } _ { 2 } {/tex} are converted into monocations, {tex} \mathrm { N } _ { 2 } ^ { + } {/tex} and {tex} \mathrm { O } _ { 2 } ^ { + } {/tex} respectively. Which is wrong?

A

In {tex} \mathrm { O } _ { 2 } {/tex} paramagnetism decreases.

{tex} \mathrm { N } _ { 2 } ^ { + } {/tex} becomes diamagnetic.

C

In {tex} \mathrm { N } _ { 2 } , {/tex} the {tex} \mathrm { N } - \mathrm { N } {/tex} bond weakens.

D

In {tex} \mathrm { O } _ { 2 } , {/tex} the {tex} \mathrm { O } - \mathrm { O } {/tex} bond order increases.

Explanation


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Q 22. {tex} \mathrm { N } _ { 2 } {/tex} and {tex} \mathrm { O } _ { 2 } {/tex} are converted into monoanions {tex} \mathrm { N } _ { 2 } - {/tex} and {tex} \mathrm { O } _ { 2 } - {/tex} respectively, which of the following statements is wrong?

A

In {tex} \mathrm { O } _ { 2 } , {/tex} bond length increases

B

{tex} \mathrm { N } _ { 2 } {/tex} becomes diamagnetic.

C

In {tex} \mathrm { N } _ { 2 } {/tex} , then {tex} \mathrm { N } - \mathrm { N } {/tex} bond weakens.

In {tex} \mathrm { O } _ { 2 } , {/tex} the {tex} \mathrm { O } - \mathrm { O } {/tex} bond order increases.

Explanation