Question 1: Palette 1/120

NEET 2026 MCQ

$ \text { Match List I with List II : } $

List-I		List-II
A.	$\mathrm{C}_2 \mathrm{H}_4$	I.	$3 \sigma$ bonds, $2 \pi$ bonds
B.	$\mathrm{C}_2 \mathrm{H}_2$	II.	$3 \sigma$ bonds, one lone pair
C.	$\mathrm{CH}_4$	III.	$4 \sigma$ bonds
D.	$\mathrm{NH}_3$	IV.	$5 \sigma$ bonds, $1 \pi$ bond

Choose the correct answer from the options given below :

A

A-III, B-IV, C-II, D-I

B

A-IV, B-I, C-III, D-II

C

A-I, B-II, C-IV, D-III

D

A-II, B-III, C-I, D-IV

Question 2: Palette 2/120

NEET 2026 MCQ

Identify the correct statement about $\mathrm{CIF}_3$ from the following options :

A

It has T-shaped geometry with two lone pairs on Cl atom.

B

It has T-shaped geometry with three lone pairs on Cl atom.

C

It has a trigonal pyramidal geometry with two lone pairs on Cl atom.

D

It has a planar trigonal geometry with two lone pairs on Cl atom.

Question 3: Palette 3/120

NEET 2026 MCQ

$ \text { The correct formal charges on oxygen atoms numbered } 2,1 \text { and } 3 \text { respectively are : } $

A

$-1,0,+1$

B

$0,+1,-1$

C

$0,0,0$

D

$+1,0,-1$

Question 4: Palette 4/120

NEET 2026 MCQ

The highest occupied molecular orbital for $\mathrm{Ne}_2$ is

A

$ \sigma_{2 p}^*$

B

$ \pi_{2 p}$

C

$\sigma_{2 p}$

D

$ \pi_{2 p}^*$

Question 5: Palette 5/120

NEET 2026 MCQ

$ \text { Match the species in List-I with their geometry in List-II. } $

	List-I		List-II
A.	${\mathrm{PCl}}_5$${\mathrm{PCl}}_5$PCl_(5)	I.	Tetrahedral
B.	${\mathrm{BrF}}_5$${\mathrm{BrF}}_5$BrF_(5)	II.	Square Planar
C.	${\mathrm{BF}}_4^{-}$${\mathrm{BF}}_4^{-}$BF_(4)^(-)	III.	Trigonal bipyramidal
D	${[\mathrm{Ni}(\mathrm{CN}{)}_4]}^{2-}$${\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}$[Ni(CN)_(4)]^(2-)	IV.	Square pyramidal

Choose the correct answer from the options given below:

A

A-III, B-II, C-I, D-IV

B

A-IV, B-III, C-I, D-II

C

A-III, B-IV, C-I, D-II

D

A-III, B-I, C-II, D-IV

Question 6: Palette 6/120

NEET 2025 MCQ

Given below are two statements :

Statement I: A hypothetical diatomic molecule with bond order zero is quite stable.

Statement II: As bond order increases, the bond length increases.

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

A

Statement I is true but Statement II is false

B

Statement I is false but Statement II is true

C

Both Statement I and Statement II are true

D

Both Statement I and Statement II are false

Question 7: Palette 7/120

NEET 2025 MCQ

Match List-I with List-II

	List - I		List - II
A	$\mathrm{XeO}_3$	I	$\mathrm{sp}^3 \mathrm{~d}$; linear
B	$\mathrm{XeF}_2$	II	$\mathrm{sp}^3$; pyramidal
C	$\mathrm{XeOF}_4$	III	$s p^3 d^3$; distorted octahedral
D	$\mathrm{XeF}_6$	IV	$s p^3 d^2$; square pyramidal

Choose the correct answer from the options given below :

A

A-IV, B-II, C-III, D-I

B

A-IV, B-II, C-I, D-III

C

A-II, B-I, C-IV, D-III

D

A-II, B-I, C-III, D-IV

Question 8: Palette 8/120

NEET 2025 MCQ

Identify the correct orders against the property mentioned

A. $\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{CHCl}_3$-dipole moment

B. $\mathrm{XeF}_4>\mathrm{XeO}_3>\mathrm{XeF}_2$ - number of lone pairs on central atom

C. $\mathrm{O}-\mathrm{H}>\mathrm{C}-\mathrm{H}>\mathrm{N}-\mathrm{O}-$ bond length

D. $\mathrm{N}_2>\mathrm{O}_2>\mathrm{H}_2-$ bond enthalpy

Choose the correct answer from the options given below:

A

A, C only

B

B, C only

C

A, D only

D

B, D only

Question 9: Palette 9/120

NEET 2024 MCQ

Which of the following molecules has "NON ZERO" dipole moment value?

A

$\mathrm{CCl}_4$

B

$\mathrm{HI}$

C

$\mathrm{CO}_2$

D

$\mathrm{BF}_3$

Question 10: Palette 10/120

NEET 2024 MCQ

Arrange the following compounds in increasing order of their solubilities in chloroform: $\mathrm{NaCl}, \mathrm{CH}_3 \mathrm{OH}$, cyclohexane, $\mathrm{CH}_3 \mathrm{CN}$

A

$\mathrm{NaCl}<\mathrm{CH}_3 \mathrm{CN}<\mathrm{CH}_3 \mathrm{OH}<$ Cyclohexane

B

$\mathrm{CH}_3 \mathrm{OH}<\mathrm{CH}_3 \mathrm{CN}<\mathrm{NaCl}<$ Cyclohexane

C

$\mathrm{NaCl}<\mathrm{CH}_3 \mathrm{OH}<\mathrm{CH}_3 \mathrm{CN}<$ Cyclohexane

D

Cyclohexane $<\mathrm{CH}_3 \mathrm{CN}<\mathrm{CH}_3 \mathrm{OH}<\mathrm{NaCl}$

Question 11: Palette 11/120

NEET 2024 MCQ

Identify the incorrect statement about $\mathrm{PCl}_5$.

A

$\mathrm{PCl}_5$ possesses two different $\mathrm{Cl}-\mathrm{P}-\mathrm{Cl}$ bond angles

B

All five $\mathrm{P}-\mathrm{Cl}$ bonds are identical in length

C

$\mathrm{PCl}_5$ exhibits $s p^3 d$ hybridisation

D

$\mathrm{PCl}_5$ consists of five $\mathrm{P}-\mathrm{Cl}$ (sigma) bonds

Question 12: Palette 12/120

NEET 2024 MCQ

Match List-I with List-II:

	List - I Molecule		List - II Bond enthalpy (kJ mol$^{-1}$)
(A)	HCl	(I)	435.8
(B)	N$_2$	(II)	498
(C)	H$_2$	(III)	946.0
(D)	O$_2$	(IV)	431.0

Choose the correct answer from the options given below:

A

A-III, B-IV, C-I, D-II

B

A-IV, B-I, C-III, D-II

C

A-IV, B-III, C-II, D-I

D

A-IV, B-III, C-I, D-II

Question 13: Palette 13/120

NEET 2024 MCQ

Match List I with List II.

	List I (Molecule)		List II (Number and types of bond/s between two carbon atoms)
A.	ethane	I.	one $\sigma$-bond and two $\pi$-bonds
B.	ethene	II.	two $\pi$-bonds
C.	carbon molecule, C$_2$	III.	one $\sigma$-bond
D.	ethyne	IV.	one $\sigma$-bond and one $\pi$-bond

Choose the correct answer from the options given below :

A

A-I, B-IV, C-II, D-III

B

A-IV, B-III, C-II, D-I

C

A-III, B-IV, C-II, D-I

D

A-III, B-IV, C-I, D-II

Question 14: Palette 14/120

NEET 2024 MCQ

Given below are two statements:

Statement I: The boiling point of hydrides of Group 16 elements follow the order $\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{S} \text {. }$

Statement II: On the basis of molecular mass, $\mathrm{H}_2 \mathrm{O}$ is expected to have lower boiling point than the other members of the group but due to the presence of extensive $\mathrm{H}$-bonding in $\mathrm{H}_2 \mathrm{O}$, it has higher boiling point.

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

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

Question 15: Palette 15/120

NEET 2024 MCQ

Intramolecular hydrogen bonding is present in

A

B

C

D

HF

Question 16: Palette 16/120

NEET 2024 MCQ

Match List I with List II.

	List I (Compound)		List II (Shape/geometry)
A.	NH$_3$	I.	Trigonal Pyramidal
B.	BrF$_5$	II.	Square Planar
C.	XeF$_4$	III.	Octahedral
D.	SF$_6$	IV.	Square Pyramidal

Choose the correct answer from the options given below:

A

A-I, B-IV, C-II, D-III

B

A-II, B-IV, C-III, D-I

C

A-III, B-IV, C-I, D-II

D

A-II, B-III, C-IV, D-I

Question 17: Palette 17/120

NEET 2024 MCQ

Identify the correct answer.

A

Three resonance structures can be drawn for ozone

B

$\mathrm{BF}_3$ has non-zero dipole moment

C

Dipole moment of $\mathrm{NF}_3$ is greater than that of $\mathrm{NH}_3$

D

Three canonical forms can be drawn for $\mathrm{CO}_3^{2-}$ ion

Question 18: Palette 18/120

NEET 2023 MCQ

The correct order of dipole moments for molecules $\mathrm{NH}_3, \mathrm{H}_2 \mathrm{~S}, \mathrm{CH}_4$ and $\mathrm{HF}$, is:

A

$\mathrm{CH}_4 > \mathrm{H}_2 \mathrm{S} > \mathrm{NH}_3 > \mathrm{HF}$

B

$\mathrm{H}_2 \mathrm{S} > \mathrm{NH}_3 > \mathrm{HF} > \mathrm{CH}_4$

C

$\mathrm{NH}_3>\mathrm{HF}>\mathrm{CH}_4>\mathrm{H}_2 \mathrm{S}$

D

$\mathrm{HF}>\mathrm{NH}_3>\mathrm{H}_2 \mathrm{~S}>\mathrm{CH}_4$

Question 19: Palette 19/120

NEET 2023 MCQ

Which one of the following represents all isoelectronic species ?

A

$\mathrm{Na}^{+}, \mathrm{Cl}^{-}, \mathrm{O}^{-}, \mathrm{NO}^{+}$

B

$\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_4, \mathrm{NO}^{+}, \mathrm{NO}$

C

$\mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{O}^{-}, \mathrm{F}^{-}$

D

$\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$

Question 20: Palette 20/120

NEET 2023 MCQ

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

A

The $\pi^*$ antibonding molecular orbital has a node between the nuclei.

B

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

C

Molecular orbitals obtained from $2 \mathrm{P}_{\mathrm{x}}$ and $2 \mathrm{P}_{\mathrm{y}}$ orbitals are symmetrical around the bond axis.

D

A $\pi$-bonding molecular orbital has larger electron density above and below the internuclear axis.

Question 21: Palette 21/120

NEET 2023 MCQ

Given below are two statements:

Statement I : Hydrated chlorides and bromides of $\mathrm{Ca}, \mathrm{Sr}$ and $\mathrm{Ba}$ on heating undergo hydrolysis.

Statement II : Hydrated chlorides and bromides of $\mathrm{Be}$ and $\mathrm{Mg}$ on heating undergo dehydration.

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

A

Statement-I is correct but Statement-II is false.

B

Statement-I is incorrect but Statement-II is true.

C

Both Statement-I and Statement-II are true.

D

Both Statement-I and Statement-II are false.

Question 22: Palette 22/120

NEET 2023 MCQ

Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is

$\mathrm{NH}_{3}, \mathrm{AlCl}_{3}, \mathrm{BeCl}_{2}, \mathrm{CCl}_{4}, \mathrm{PCl}_{5}$ :

A

2

B

4

C

1

D

3

Question 23: Palette 23/120

NEET 2023 MCQ

The correct order of energies of molecular orbitals of $\mathrm{N}_{2}$ molecule, is

A

$\sigma 1 \mathrm{~s} < \sigma^{*} 1 \mathrm{~s} < \sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$

B

$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right)$

C

$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$

D

$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$

Question 24: Palette 24/120

NEET 2023 MCQ

Taking stability as the factor, which one of the following represents correct relationship?

A

InI$_3$ > lnI

B

AlCl > AlCl$_3$

C

TlI > TlI$_3$

D

TlCl$_3$ > TlCl

Question 25: Palette 25/120

NEET 2023 MCQ

Intermolecular forces are forces of attraction and repulsion between interacting particles that will include:

A. dipole - dipole forces.

B. dipole - induced dipole forces

C. hydrogen bonding

D. covalent bonding

E. dispersion forces

Choose the most appropriate answer from the options given below :

A

A, B, C, D are correct

B

A, B, C, E are correct

C

A, C, D, E are correct

D

B, C, D, E are correct

Question 26: Palette 26/120

NEET 2022 MCQ

Match List-I with List-II :

	List-I (Molecules)		List-II (Shape)
(a)	NH$_3$	(i)	Square pyramidal
(b)	ClF$_3$	(ii)	Trigonal bipyramidal
(c)	PCl$_5$	(iii)	Trigonal pyramidal
(d)	BrF$_5$	(iv)	T-shape

Choose the correct answer from the options given below :

A

(a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)

B

(a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)

C

(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

D

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

Question 27: Palette 27/120

NEET 2022 MCQ

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

A

CO₂ < NH₃ < H₂O < $\mathop {\mathrm{N{H_4}}}\limits^ + $

B

H₂O < NH₃ < $\mathop {\mathrm{N{H_4}}}\limits^ + $ < CO₂

C

H₂O < $\mathop {\mathrm{N{H_4}}}\limits^ + $ < NH₃ < CO₂

D

H₂O < $\mathop {\mathrm{N{H_4}}}\limits^ + $ = NH₃ < CO₂

Question 28: Palette 28/120

NEET 2022 MCQ

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A) : ICI is more reactive than I₂

Reason (R) : I-CI bond is weaker than I-I bond.

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

A

Both (A) and (R) are correct and (R) is the correct explanation of (A).

B

Both (A) and (R) are correct but (R) is not the correct explanation of (A).

C

(A) is correct but (R) is not correct.

D

(A) is not correct but (R) is correct.

Question 29: Palette 29/120

NEET 2022 MCQ

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

A

CIF₃

B

IF₅

C

SF₄

D

XeF₂

Question 30: Palette 30/120

NEET 2022 MCQ

Which amongst the following is incorrect statement?

A

The bond orders of O$_2^ + $, O₂, O$_2^ - $ and O$_2^ {2-} $ are 2.5, 2, 1.5 and 1, respectively

B

C₂ molecule has four electrons in its two degenerate $\pi$ molecular orbitals

C

H$_2^ + $ ion has one electron

D

O$_2^ + $ ion is diamagnetic

Question 31: Palette 31/120

NEET 2021 MCQ

BF₃ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :

A

sp² and 8

B

sp³ and 4

C

sp³ and 6

D

sp² and 6

Question 32: Palette 32/120

NEET 2021 MCQ

Match List - I with List - II :

	List - I		List - II
(a)	$PC{l_5}$	(i)	Square pyramidal
(b)	$S{F_6}$	(ii)	Trigonal planar
(c)	$Br{F_5}$	(iii)	Octahedral
(d)	$B{F_3}$	(iv)	Trigonal bipyramidal

Choose the correct answer from the options given below.

A

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

B

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

C

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

D

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

Question 33: Palette 33/120

NEET 2021 MCQ

The correct sequence of bond enthalpy of 'C-X' bond is :

A

CH₃ - Cl > CH₃ - F > CH₃ - Br > CH₃ - l

B

CH₃ - F < CH₃ - Cl < CH₃ - Br < CH₃ - l

C

CH₃ - F > CH₃ - Cl > CH₃ - Br > CH₃ - l

D

CH₃ - F < CH₃ - Cl > CH₃ - Br > CH₃ - l

Question 34: Palette 34/120

NEET 2021 MCQ

Which of the following molecules is non-polar in nature?

A

NO₂

B

POCl₃

C

CH₂O

D

SbCl₅

Question 35: Palette 35/120

NEET 2020 MCQ

Which of the following set of molecules will have zero dipole moment?

A

Boron trifluoride, hydrogen, fluoride, carbon dioxide, 1, 3-dichlorobenzene

B

Nitrogen trifluoride, beryllium difluoride, water, 1, 3-dichlorobenzene

C

Boron trifluoride, beryllium difluoride, carbon dioxide, 1, 4-dichlorobenzene

D

Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene

Question 36: Palette 36/120

NEET 2020 MCQ

Identify a molecule which does not exist.

A

Li₂

B

C₂

C

O₂

D

He₂

Question 37: Palette 37/120

NEET 2019 MCQ

The correct structure of tribromooctaoxide is :

A

B

C

D

Question 38: Palette 38/120

NEET 2019 MCQ

The manganate and permanganate ions are tetrahedral due to :

A

The $\pi $-bonding involves overlap of p-orbitals of oxygen with p-orbtials of manganese

B

The $\pi $-bonding involves overlap of d-orbitals of oxygen with d-orbitals of manganese

C

The $\pi $-bonding involves overlap of p-orbitals of oxygen with d-orbitals of manganese

D

There is no $\pi $-bonding

Question 39: Palette 39/120

NEET 2019 MCQ

The number of sigma ($\sigma $) and pi ($\pi $) bonds in pent-2-en-4-yne is -

A

11 $\sigma $ bonds and 2 $\pi $ bonds

B

13 $\sigma $ bonds and no $\pi $ bonds

C

10 $\sigma $ bonds and 3 $\pi $ bonds

D

8 $\sigma $ bonds and 5 $\pi $ bonds

Question 40: Palette 40/120

NEET 2019 MCQ

Which of the following diatomic molecular species has only $\pi $ bonds according to Molecular Orbital Theory?

A

C₂

B

Be₂

C

O₂

D

N₂

Question 41: Palette 41/120

NEET 2018 MCQ

In the structure of ClF₃ , the number of lone pairs of electrons on central atom ‘Cl’ is

A

one

B

two

C

four

D

three

Question 42: Palette 42/120

NEET 2018 MCQ

Consider the following species : CN⁺ , CN^– , NO and CN. Which one of these will have the highest bond order?

A

NO

B

CN^–

C

CN⁺

D

NO

Question 43: Palette 43/120

NEET 2017 MCQ

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

A

O₂, NO⁺

B

CN^$-$, CO

C

N₂, O₂^$-$

D

CO, NO

Question 44: Palette 44/120

NEET 2017 MCQ

The species, having bond angles of 120^o is

A

ClF₃

B

NCl₃

C

BCl₃

D

PH₃

Question 45: Palette 45/120

NEET 2017 MSQ

Which of the following pairs of compounds is isostructural ?

A

Tel₂, XeF₂

B

IBr₂^$-$, XeF₂

C

IF₃, XeF₂

D

BeCl₂, XeF₂

Question 46: Palette 46/120

NEET 2016 MCQ

The hybridizations of atomic orbitals of nitrogen in NO$_2^ + $, NO$_3^ - $  and  NH$_4^ + $  respectively are

A

sp, sp³ and sp²

B

sp², sp³ and sp₃

C

sp, sp² and sp³

D

sp², sp and sp³

Question 47: Palette 47/120

NEET 2016 MCQ

The correct geometry and hybridization for XeF₄ are

A

octahedral, sp³d²

B

trigonal bipyramidal, sp³d

C

planar triangle, sp³d³

D

square planar, sp³d²

Question 48: Palette 48/120

NEET 2016 MCQ

Among the following, which one is a wrong statement ?

A

PH₅ and BiCl₅ do not exist.

B

p$\pi $-d$\pi $ bonds are present in SO₂.

C

SeF₄ and CH₄ have same shape.

D

I₃⁺ has bent geometry.

Question 49: Palette 49/120

NEET 2016 MCQ

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

A

H₂O₂

B

HCN

C

Cellulose

D

Concentrated acetic acid

Question 50: Palette 50/120

NEET 2016 MCQ

Consider the molecules CH₄, NH₃ and H₂O.

Which of the given statements is false?

A

The H $-$ O $-$ H bond angle in H₂O is smaller than the H $-$ N $-$ H bond angle in NH₃.

B

The H $-$ C $-$ H bond angle in CH₄ is larger than the H $-$ N $-$ H bond angle in NH₃.

C

The H $-$ C $-$ H bond angle in CH₄, the H $-$ N $-$ H bond angle in NH₃, and the H $-$ O $-$ H bond angle in H₂O are all greater than 90^o.

D

The H $-$ O $-$ H bond angle in H₂O is larger than the H $-$ C $-$ H bond angle in CH₄.

Question 51: Palette 51/120

NEET 2016 MCQ

Predict the correct order among the following :

A

bond pair - bond pair > long pair - bond pair > lone pair - lone pair

B

lone pair - bond pair > bond pair - bond pair > lone pair - lone pair

C

lone pair - lone pair > lone pair - bond pair > bond pair - bond pair

D

lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

Question 52: Palette 52/120

NEET 2016 MCQ

Which of the following pairs of ions is isoelectronic and isostructural ?

A

$C{O_3}^{2 - },\,\,N{O_3}^ - $

B

$C{lO_3}^{2 - },\,\,C{O_3}^{2 - }$

C

$S{O_3}^{2 - },\,\,N{O_3}^ - $

D

$Cl{O_3}^ - ,\,\,S{O_3}^{2 - }$

Question 53: Palette 53/120

NEET 2015 MCQ

In which of the following pairs, both the species are not isostructural ?

A

Diamond, Silicon carbide

B

NH₃, PH₃

C

XeF₄, XeO₄

D

SiCl₄, PCl₄⁺

Question 54: Palette 54/120

NEET 2015 MCQ

Decreasing order of stability of O₂, O₂^$-$, O₂⁺ and O₂^2$-$ is

A

O₂^2$-$  >  O₂^$-$  >  O₂  >  O₂⁺

B

O₂  >  O₂⁺  >  O₂^2$-$  >  O₂^$-$

C

O₂^$-$  >  O₂^2$-$  >  O₂⁺  >  O₂

D

O₂⁺  >  O₂  >  O₂^$-$  >  O₂^2$-$

Question 55: Palette 55/120

NEET 2015 MCQ

The correct bond order in the following species is

A

O₂⁺ < O₂^$-$ < O₂²⁺

B

O₂^$-$ < O₂⁺ < O₂²⁺

C

O₂²⁺ < O₂⁺ < O₂^$-$

D

O₂²⁺ < O₂^$-$ < O₂⁺

Question 56: Palette 56/120

NEET 2015 MCQ

Maximum bond angle at nitrogen is present in which of the following ?

A

NO₂⁺

B

NO₃^$-$

C

NO₂

D

NO₂^$-$

Question 57: Palette 57/120

NEET 2015 MCQ

Which of the following species contains equal number of $\sigma $- and $\pi $-bonds ?

A

(CN)₂

B

CH₂(CN)₂

C

HCO₃^$-$

D

XeO₄

Question 58: Palette 58/120

NEET 2015 MCQ

Which of the following pairs of ions are isoelectronic and isostructural ?

A

SO₃^2$-$,  NO₃^$-$

B

ClO₃^$-$,  SO₃^2$-$

C

CO₃^2$-$, SO₃^2$-$

D

ClO₃^$-$, CO₃^2$-$,

Question 59: Palette 59/120

NEET 2015 MCQ

Which of the following options represents the correct bond order ?

A

O₂^$-$  > O₂ < O₂⁺

B

O₂^$-$  <  O₂  >  O₂⁺

C

O₂^$-$  >  O₂  >  O₂⁺

D

O₂^$-$  <  O₂  <  O₂⁺

Question 60: Palette 60/120

NEET 2014 MCQ

Which of the following molecules has the maximum dipole moment ?

A

CO₂

B

CH₄

C

NH₃

D

NF₃

Question 61: Palette 61/120

NEET 2014 MCQ

Which one of the following species has plane triangular shape ?

A

N₃

B

NO₃^$-$

C

NO₂^$-$

D

CO₂

Question 62: Palette 62/120

NEET 2013 MCQ

The outer orbitals of C in ethane molecule can be considered to be hybridized to give three equivalent sp² orbitals. The total number of sigma $\left( \sigma \right)$ and pi $\left( \pi \right)$ bonds in ethane molecule is

A

3 sigma $\left( \sigma \right)$ and 2 pi $\left( \pi \right)$ bonds

B

4 sigma $\left( \sigma \right)$ and 1 pi $\left( \pi \right)$ bonds

C

5 sigma $\left( \sigma \right)$ and 1 pi $\left( \pi \right)$ bonds

D

1 sigma $\left( \sigma \right)$ and 2 pi $\left( \pi \right)$ bonds

Question 63: Palette 63/120

NEET 2013 MCQ

In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic.

A

O₂ $ \to $ O₂⁺

B

C₂ $ \to $ C₂⁺

C

NO $ \to $ NO⁺

D

N₂ $ \to $ N₂⁺

Question 64: Palette 64/120

NEET 2013 MCQ

The pair of species that has the same bond order in the following is

A

CO, NO⁺

B

NO^$-$, CN^$-$

C

O₂, N₂

D

O₂, B₂

Question 65: Palette 65/120

NEET 2013 MCQ

In which of the following pair both the species have sp³ hybridization ?

A

SiF₄, BeH₂

B

NF₃, H₂O

C

NF₃, BF₃

D

H₂S, BF₃

Question 66: Palette 66/120

NEET 2013 MCQ

XeF₂ is isostructural with

A

SbCl₃

B

BaCl₂

C

TeF₂

D

ICl₂^$-$

Question 67: Palette 67/120

NEET 2013 MCQ

Dipole-induced dipole interactions are present in which of the following pairs

A

HCl and He atoms

B

SiF₄ and He atoms

C

H₂O and alcohol

D

Cl₂ and CCl₄

Question 68: Palette 68/120

NEET 2013 MCQ

Which of the following is electron-deficient ?

A

(BH₃)₂

B

PH₃

C

(CH₃)₂

D

(SiH₃)₂

Question 69: Palette 69/120

NEET 2013 MCQ

Which of the following is a polar molecule?

A

SiF₄

B

XeF₄

C

BF₃

D

SF₄

Question 70: Palette 70/120

NEET 2013 MCQ

Which of the following is paramagnetic?

A

CN^$-$

B

NO⁺

C

CO

D

O₂^$-$

Question 71: Palette 71/120

NEET 2013 MCQ

Identify the correct order of solubility in aqueous medium.

A

Na₂S > CuS > ZnS

B

Na₂S > ZnS > CuS

C

Cus > ZnS > Na₂S

D

ZnS > Na₂S > CuS

Question 72: Palette 72/120

NEET 2012 MCQ

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

A

$NO < {O_2}^ - < {C_2}^{2 - } < He_2^ + $

B

${O_2}^ - < NO < {C_2}^{2 - } < He_2^ + $

C

${C_2}^{2 - } < He_2^ + < {O_2}^ - < NO$

D

$He_2^ + < {O_2}^ - < NO < {C_2}^{2 - }$

Question 73: Palette 73/120

NEET 2012 MCQ

During change of O₂ to O$_2^{ - }$ ion, the electron adds on which one of the following orbitals ?

A

${\pi ^ * }$ orbital

B

$\pi $ orbital

C

${\sigma ^ * }$ orbital

D

$\sigma $ orbital

Question 74: Palette 74/120

NEET 2012 MCQ

Which one of the following pairs is isostructural (i.e., having the same shape and hybridization) ?

A

[BCl₃ and BrCl₃]

B

[NH₃ and NO$_3^ - $]

C

[NF₃ and BF₃]

D

[BF$_4^ - $ and NH$_4^ + $]

Question 75: Palette 75/120

NEET 2012 MCQ

Which of the following species contains three bond pairs and one lone pair arround the central atom ?

A

H₂O

B

BF₃

C

NH₂^$-$

D

PCl₃

Question 76: Palette 76/120

NEET 2012 MCQ

The pair of species with the same bond order is

A

O$_2^{2 - }$, B₂

B

O$_2^{ + }$, NO⁺

C

NO, CO

D

N₂, O₂

Question 77: Palette 77/120

NEET 2012 MCQ

Bond order of 1.5 is shown by

A

O₂⁺

B

O₂^$-$

C

O₂2^$-$

D

O₂

Question 78: Palette 78/120

NEET 2011 MCQ

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

A

$O_2^ - ,O_2^{2 - }$ - Both diamagnetic

B

$O_2^ + ,{O_2}$ - Both paramagnetic

C

O, $O_{2}^{2-}$ - Both paramagnetic

D

${O^ + },O_2^{2 - }$ - Both paramagnetic

Question 79: Palette 79/120

NEET 2011 MCQ

Which of the following structures is the most preferred and hence of lowest energy for SO₃?

A

B

C

D

Question 80: Palette 80/120

NEET 2011 MCQ

Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals, NO$_2^ - $. NO$_3^ - $, NH$_2^ - $, NH$_4^ + $, SCN^$-$?

A

NO$_2^ - $ and NO$_3^ - $

B

NH$_4^ + $ and NO$_3^ - $

C

SCN^$-$ and NH$_2^ - $

D

NO$_2^ - $ and NH$_2^ - $

Question 81: Palette 81/120

NEET 2011 MCQ

The pairs of species of oxygen and their magnetic behavior are noted below. Which of the following presents the correct description?

A

O$_2^ - $, O$_2^{2 - }$ - Both diamagnetic

B

O⁺, O$_2^{2 - }$ - Both paramagnetic

C

O$_2^{ + }$, O₂ - Both paramagnetic

D

O, O$_2^{2 - }$ - Both paramagnetic

Question 82: Palette 82/120

NEET 2011 MCQ

The correct order of increasing bond length of C $-$ H, C $-$ O, C $-$ C and C$=$C is

A

C $-$ H < C$=$C < C $-$ O < C $-$ C

B

C $-$ C < C$=$C < C $-$ O < C $-$ H

C

C $-$ O < C $-$ H < C $-$ C < C$=$C

D

C $-$ H < C $-$ O < C $-$ C < C$=$C

Question 83: Palette 83/120

NEET 2011 MCQ

Which of the following has the minimum bond length ?

A

O₂⁺

B

O₂^$-$

C

O₂^2$-$

D

O₂

Question 84: Palette 84/120

NEET 2010 MCQ

Some of the properties of the two species, $NO_3^ - $ and ${H_3}{O^ + }$ are described below. Which one of them is current?

A

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.

Question 85: Palette 85/120

NEET 2010 MCQ

In which of the following molecules the central atom does not have sp³ hybridization?

A

CH₄

B

SF₄

C

BF₄^$-$

D

NH₄⁺

Question 86: Palette 86/120

NEET 2010 MCQ

In which of the following pairs of molecules/ ions, the central atoms have sp² hybridisation ?

A

NO$_2^{ - }$ and NH₃

B

BF₃ and NO$_2^{ - }$

C

NH$_2^{ - }$ and H₂O

D

BF₃ and NH$_2^{ - }$

Question 87: Palette 87/120

NEET 2010 MCQ

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?

A

SF₄

B

I₃^$-$

C

SbCl₅^2$-$

D

PCl₅

Question 88: Palette 88/120

NEET 2010 MCQ

Which one of the following species does not exist under normal conditions?

A

Be₂⁺

B

Be₂

C

B₂

D

Li₂

Question 89: Palette 89/120

NEET 2009 MCQ

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

A

$N_2^{2 - } < N_2^ - < {N_2}$

B

${N_2} < N_2^{2 - } < N_2^ - $

C

$N_2^ - < N_2^{2 - } < {N_2}$

D

$N_2^ - < {N_2} < N_2^{2 - }$

Question 90: Palette 90/120

NEET 2009 MCQ

In which of the following molecules/ions BF₃, NO$_2^ - $, NH$_2^ - $ and H₂O, the central atom is sp² hybridised?

A

NH$_2^ - $ and H₂O

B

NO$_2^ - $ and H₂O

C

BF₃ and NO$_2^ - $

D

NO$_2^ - $ and NH$_2^ - $

Question 91: Palette 91/120

NEET 2009 MCQ

What is the dominant intermolecular force or bond that must be overcome in converting liquid CH₃OH to a gas?

A

Dipole-dipole interaction

B

Covalent bonds

C

London dispersion force

D

Hydrogen bonding

Question 92: Palette 92/120

NEET 2008 MCQ

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

A

NO$_2^ + $ < NO₂ < NO$_2^ - $

B

NO$_2^ + $ < NO$_2^ - $ < NO₂

C

NO$_2^ - $ < NO$_2^ + $ < NO₂

D

NO$_2^ - $ < NO₂ < NO$_2^ + $

Question 93: Palette 93/120

NEET 2008 MCQ

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

A

$NO < {O_2}^ - < {C_2}^{2 - } < He_2^ + $

B

${O_2}^ - < NO < {C_2}^{2 - } < He_2^ + $

C

${C_2}^{2 - } < He_2^ + < {O_2}^ - < NO$

D

$He_2^ + < {O_2}^ - < NO < {C_2}^{2 - }$

Question 94: Palette 94/120

NEET 2007 MCQ

The correct order of C $-$ O bond length among CO, CO${_3^{2 - }}$, CO₂ is

A

CO < CO${_3^{2 - }}$ < CO₂

B

CO${_3^{2 - }}$ < CO₂ < CO

C

CO < CO₂ < CO${_3^{2 - }}$

D

CO₂ < CO${_3^{2 - }}$ < CO

Question 95: Palette 95/120

NEET 2007 MCQ

In which of the following pairs, the two species are isostructural?

A

SO${_3^{2 - }}$ and NO${_3^{ - }}$

B

BF₃ and NF₃

C

BrO${_3^{ - }}$ and XeO₃

D

SF₄ and XeF₄

Question 96: Palette 96/120

NEET 2006 MCQ

Which of the following is not a correct statement?

A

Multiple bonds are always shorter than corresponding single bonds.

B

The electron-deficient molecules can act as Lewis acids.

C

The canonical structures have no real existence.

D

Every AB₅ molecule does in fact have square pyramid structure.

Question 97: Palette 97/120

NEET 2006 MCQ

The electronegativity difference berween N and F is greater than that between N and H yet the dipole moment of NH₃ (1.5D) is larger than that of NF₃ (0.2 D). This is because

A

in NH₃ the atomic dipole and bond dipole are in the opposite directions whereas in NF₃ these are in the same direction

B

in NH₃ as well as in NF₃ the atomic dipole and bond dipole are in the same direction

C

in NH₃ the atomic dipole and bond dipole are in the same direction whereas in NF₃ these are in opposite directions

D

in NH₃ as well as in NF₃ the atomic dipole and bond dipole are in opposite directions.

Question 98: Palette 98/120

NEET 2006 MCQ

Which of the following species has a linear shape?

A

O₃

B

NO₂^$-$

C

SO₂

D

NO₂⁺

Question 99: Palette 99/120

NEET 2006 MCQ

Which of the following is not isostructural with SiCl₄ ?

A

NH₄^$-$

B

SCl₄

C

SO₄^2$-$

D

PO₄^3$-$

Question 100: Palette 100/120

NEET 2005 MCQ

The correct sequence of increasing covalent character is represented by

A

LiCl < NaCl < BeCl₂

B

BeCl₂ < LiCl < NaCl

C

NaCl < LiCl < BeCl₂

D

BeCl₂ < NaCl < LiCl

Question 101: Palette 101/120

NEET 2005 MCQ

The correct order in which the O $-$ O bond length increases in the following is

A

O₂ < H₂O₂ < O₃

B

O₃ < H₂O₂ < O₂

C

H₂O₂ < O₂ < O₃

D

O₂ < O₃ < H₂O₂

Question 102: Palette 102/120

NEET 2005 MCQ

The surface tension of which of the following liquid is maximum ?

A

C₂H₅OH

B

CH₃OH

C

H₂O

D

C₆H₆

Question 103: Palette 103/120

NEET 2005 MCQ

Which of the following would have a permanent dipole moment?

A

SiF₄

B

SF₄

C

XeF₄

D

BF₃

Question 104: Palette 104/120

NEET 2005 MCQ

Which of the following molecules has trigonal planar geometry?

A

BF₃

B

NH₃

C

PCl₃

D

IF₃

Question 105: Palette 105/120

NEET 2004 MCQ

In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize

A

lone pair - bond pair repulsion only

B

bond pair - bond pair repulsion only

C

lone pair - lone pair repulsion and lone pair - bond pair repulsion

D

lone pair - lone pair repulsion only.

Question 106: Palette 106/120

NEET 2004 MCQ

H₂O is dipolar, whereas BeF₂ is not. It is because

A

the electronegativity of F is greater than that of O

B

H₂O involves hydrogen bonding whereas BeF₂ is a discrete molecule

C

H₂O is linear and BeF₂ is angular

D

H₂O is angular and BeF₂ is linear.

Question 107: Palette 107/120

NEET 2004 MCQ

In a regular octahedral molecule, MX₆ the number of X $-$ M $-$ X bonds at 180^o is

A

three

B

two

C

six

D

four

Question 108: Palette 108/120

NEET 2004 MCQ

Among the following, the pair in which the two species are not isostructural is

A

SiF₄ and SF₄

B

IO₃^$-$ and XeO₃

C

BH₄^$-$ and NH₄⁺

D

PF₆^$-$ and SF₆

Question 109: Palette 109/120

NEET 2003 MCQ

Which one of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms?

A

sigma-bond is stronger than a pi-bond.

B

Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectively

C

Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond.

D

Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard.

Question 110: Palette 110/120

NEET 2002 MCQ

In NO₃^$-$ ion number of bond pair and lone pair of electrons on nitrogen atom are

A

2, 2

B

3, 1

C

1, 3

D

4, 0

Question 111: Palette 111/120

NEET 2002 MCQ

Which of the following has p$\pi $ $-$ d$\pi $ bonding?

A

NO₃^$-$

B

SO₃^2$-$

C

BO₃^3$-$

D

CO₃^2$-$

Question 112: Palette 112/120

NEET 2002 MCQ

Which of the following is isoelectronic?

A

CO₂, NO₂

B

NO₂^$-$, CO₂

C

CN^$-$, CO

D

SO₂, CO₂

Question 113: Palette 113/120

NEET 2001 MCQ

Nitrogen forms N₂, but phosphorus does not form P₂, however, it converts P₄, reason is

A

triple bond present between phosphorus atom

B

p$\pi $ $-$ p$\pi $ bonding is weak

C

p$\pi $ $-$ p$\pi $ bonding is strong

D

multiple bonds form easily.

Question 114: Palette 114/120

NEET 2001 MCQ

Which of the following two are isostructural?

A

XeF₂, IF₂^$-$

B

NH₃, BF₃

C

CO₃^2$-$, SO₃^2$-$

D

PCl₅, ICl₅

Question 115: Palette 115/120

NEET 2001 MCQ

In which of the following bond angle is maximum ?

A

NH₃

B

NH₄⁺

C

PCl₃

D

SCl₂

Question 116: Palette 116/120

NEET 2001 MCQ

In X - H --- Y, X and Y both are electronegative elements. Then

A

electron density on X will increase and on H will decrease

B

in both electron density will increase

C

in both electron density will decrease

D

on X electron density will decrease and on H increases.

Question 117: Palette 117/120

NEET 2000 MCQ

d$\pi $ $-$ p$\pi $ bond present in

A

CO₃^2$-$

B

PO₄^3-

C

NO₃^$-$

D

NO₂^$-$

Question 118: Palette 118/120

NEET 2000 MCQ

Which species does not exhibit paramagnetism?

A

N₂⁺

B

O₂^$-$

C

CO

D

NO

Question 119: Palette 119/120

NEET 2000 MCQ

Which compound has planar structure?

A

XeF₄

B

XeOF₂

C

XeO₂F₂

D

XeO₄

Question 120: Palette 120/120

NEET 2000 MCQ

Right order of dissociation energy N₂ and N₂⁺ is

A

N₂ > N₂⁺

B

N₂ = N₂⁺

C

N₂⁺ > N²

D

none