Question 1: Palette 1/93

NEET 2026 MCQ

Identify the incorrect statement from the following:

A

Nitrogen can form $p \pi-p \pi$ multiple bonds with itself.

B

$\quad \mathrm{P}\left(\mathrm{C}_2 \mathrm{H}_5\right)_3$ and $\mathrm{As}\left(\mathrm{C}_6 \mathrm{H}_5\right)_3$ form $\mathrm{d} \pi-\mathrm{d} \pi$ bond with transition metals.

C

Phosphorus, arsenic and antimony show catenation property.

D

Nitrogen can form $d \pi-p \pi$ bond with oxygen.

Question 2: Palette 2/93

NEET 2026 MCQ

Identify the incorrect statement from the following:

A

Carbon has the ability to form $p \pi-p \pi$ multiple bond with itself.

B

$\mathrm{ECl}_3(\mathrm{E}=\mathrm{B}$ and Al$)$ is a monomer when $\mathrm{E}=\mathrm{B}$ and a dimer when $\mathrm{E}=\mathrm{Al}$.

C

The order of catenation property of Group 14 elements is $\mathrm{C} \gg \mathrm{Si}>\mathrm{Ge} \approx \mathrm{Sn}$.

D

Oxygen exhibits only -2 oxidation state.

Question 3: Palette 3/93

NEET 2026 MCQ

Given below are two statements :

Statement-I : Heating NaCl with concentrated $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{MnO}_2$ results in oxidation of Mn .

Statement-II : Heating NaI with concentrated $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{MnO}_2$ results in reduction of Mn .

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

A

Statement-I is incorrect but Statement-II is correct

B

Both Statement-I and Statement-II are correct

C

Both Statement-I and Statement-II are incorrect

D

Statement-I is correct but Statement-II is incorrect

Question 4: Palette 4/93

NEET 2026 MCQ

In potash alum, the ratio of $\mathrm{K}^{+}$and $\mathrm{SO}_4^{2-}$ ions is

A

$3: 2$

B

$1: 2$

C

$2: 1$

D

$2: 3$

Question 5: Palette 5/93

NEET 2026 MCQ

The correct statement is

A

Aluminium has five valence orbitals.

B

Boron has a maximum covalency of four.

C

Beryllium has three valence orbitals.

D

Magnesium has a maximum covalency of four.

Question 6: Palette 6/93

NEET 2025 MCQ

Given below are two statements :

Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.

Statement II: Antimony cannot form antimony pentoxide.

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

A

Statement I is correct but Statement II is incorrect

B

Statement I is incorrect but Statement II is correct

C

Both Statement I and Statement II are correct

D

Both Statement I and Statement II are incorrect

Question 7: Palette 7/93

NEET 2024 MCQ

Identify the incorrect statement from the following :

A

The acidic strength of $\mathrm{HX}(\mathrm{X}=\mathrm{F}, \mathrm{Cl}, \mathrm{Br}$ and $\mathrm{I})$ follows the order: $\mathrm{HF}>\mathrm{HCl}>\mathrm{HBr}>\mathrm{HI}$.

B

Fluorine exhibits $-$1 oxidation state whereas other halogens exhibit $+1,+3,+5$ and $+7$ oxidation states also.

C

The enthalpy of dissociation of $\mathrm{F}_2$ is smaller than that of $\mathrm{Cl}_2$.

D

Fluorine is stronger oxidising agent than chlorine.

Question 8: Palette 8/93

NEET 2024 MCQ

Match List I with List II:

	List - I Solid salt treated with dil. H$_2$SO$_4$		List - II Anion detected
(A)	effervescence of colourless gas	(I)	NO$_2^-$
(B)	gas with smell of rotten egg	(II)	CO$_3^{2-}$
(C)	gas with pungent smell	(III)	S$^{2-}$
(D)	brown fumes	(IV)	SO$_3^{2-}$

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 9: Palette 9/93

NEET 2024 MCQ

Among Group 16 elements, which one does NOT show -2 oxidation state?

A

O

B

$\mathrm{Se}$

C

$\mathrm{Te}$

D

Po

Question 10: Palette 10/93

NEET 2024 MCQ

Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to $\mathrm{VI}$.

A. $\mathrm{Al}^{3+}$

B. $\mathrm{Cu}^{2+}$

C. $\mathrm{Ba}^{2+}$

D. $\mathrm{Co}^{2+}$

E. $\mathrm{Mg}^{2+}$

Choose the correct answer from the options given below.

A

B, A, D, C, E

B

B, C, A, D, E

C

E, C, D, B, A

D

E, A, B, C, D

Question 11: Palette 11/93

NEET 2023 MCQ

Match the List - I with List - II

	List - I (Hydride)		List - II (Type of Hydride)
(A)	$\mathrm{NaH}$	(I)	Electron precise
(B)	$\mathrm{PH_3}$	(II)	Saline
(C)	$\mathrm{GeH_4}$	(III)	Metallic
(D)	$\mathrm{LaH_{2.87}}$	(IV)	Electron rich

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 12: Palette 12/93

NEET 2023 MCQ

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

Assertion A : Helium is used to dilute oxygen in diving apparatus.

Reason R : Helium has high solubility in O$_2$.

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

A

Both A and R are true but R is NOT the correct explanation of A.

B

A is true but R is false.

C

A is false but R is true.

D

Both A and R are true and R is the correct explanation of A.

Question 13: Palette 13/93

NEET 2023 MCQ

Match List I with List II:

	List I		List II
(A)	Coke	(I)	Carbon atoms are sp$^3$ hybridised
(B)	Diamond	(II)	Used as a dry lubricant
(C)	Fullerene	(III)	Used as a reducing agent
(D)	Graphite	(IV)	Cage like molecules

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 14: Palette 14/93

NEET 2023 MCQ

The element expected to form largest ion to achieve the nearest noble gas configuration is

A

$\mathrm{F}$

B

$\mathrm{N}$

C

$\mathrm{Na}$

D

$\mathrm{O}$

Question 15: Palette 15/93

NEET 2023 MCQ

Match List I with List II:

	List I (Oxoacids of Sulphur)		List II (Bonds)
(A)	Peroxodisulphuric acid	(I)	Two S-OH, Four S=O, One S-O-S
(B)	Sulphuric acid	(II)	Two S-OH, One S=O
(C)	Pyrosulphuric acid	(III)	Two S-OH, Four S=O, One S-O-O-S
(D)	Sulphurous acid	(IV)	Two S-OH, Two S=O

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 16: Palette 16/93

NEET 2022 MCQ

Match List-I with List-II :

	List-I (Compounds)		List-II (Molecular formula)
(a)	Borax	(i)	NaBO$_2$
(b)	Kernite	(ii)	Na$_2$B$_4$O$_7$ . 4H$_2$O
(c)	Orthoboric acid	(iii)	H$_3$BO$_3$
(d)	Borax bead	(iv)	Na$_2$B$_4$O$_7$ . 10H$_2$O

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 17: Palette 17/93

NEET 2022 MCQ

Which of the following reactions is a part of the large scale industrial preparation of nitric acid?

A

Cu(NO₃)₂ + 2NO₂ + 2H₂O $\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $ 4HNO₃ + Cu

B

NaNO₃ + H₂SO₄ $\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $ NaHSO₄ + HNO₃

C

4NH₃ + 5O₂ (from air) $\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $ 4NO + 6H₂O

D

4HPO₃ + 2N₂O₅ $\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{\mathrm{500\,K,\,9\,bar}}^{\mathrm{Pt}}} $ 4HNO₃ + P₄O₁₀

Question 18: Palette 18/93

NEET 2022 MCQ

Na₂B₄O₇ $\buildrel {heat} \over \longrightarrow $ X + NaBO₂

in the above reaction the product "X" is :

A

NaB₃O₅

B

H₃BO₃

C

B₂O₃

D

Na₂B₂O₅

Question 19: Palette 19/93

NEET 2022 MCQ

Match List-I with List-II.

	List - I (Hydrides)		List - II (Nature)
(a)	MgH$_2$	(i)	Electron precise
(b)	GeH$_4$	(ii)	Electron deficient
(c)	B$_2$H$_6$	(iii)	Electron rich
(d)	HF	(iv)	Ionic

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 20: Palette 20/93

NEET 2022 MCQ

Which of the following statement is not correct about diborane?

A

There are two 3-centre-2-eletron bonds.

B

The four terminal B-H bonds are two centre two electron bonds.

C

The four terminal Hydrogen atoms and the two Boron atoms lie in one plane.

D

Both the Boron atoms are sp² hybridised.

Question 21: Palette 21/93

NEET 2022 MCQ

Given below are two statements

Statement I : The boiling points of the following hydrides of group 16 elements increases in the order -

H₂O < H₂S < H₂Se < H₂Te

Statement II : The boiling points of these hydrides increase with increase in molar mass.

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

A

Both Statement I and Statement II are correct

B

Both Statement I and Statement II are incorrect

C

Statement I is correct but Statement II is incorrect

D

Statement I is incorrect but Statement II is correct

Question 22: Palette 22/93

NEET 2021 MCQ

Statement I : Acid strength increases in the order given as HF << HCl << HBr << HI.

Statement II : As the size of the elements, F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases.

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

A

Statement I is incorrect but Statement II is true.

B

Both Statement I and Statement II are true.

C

Both Statement I and Statement II are false.

D

Statement I is correct but Statement II is false.

Question 23: Palette 23/93

NEET 2021 MCQ

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

A

Noble gases have large positive values of electron gain enthalpy

B

Noble gases are sparingly soluble in water

C

Noble gases have very high melting and boiling points

D

Noble gases have weak dispersion forces

Question 24: Palette 24/93

NEET 2021 MCQ

In which one of the following arrangements the given sequence is not strictly according to the properties indicted against it?

A

CO₂ < SiO₂ < SnO₂ < PbO₂ : Increasing oxidizing order

B

HF < HCl < HBr < HI : Increasing acidic strength

C

H₂O < H₂S < H₂Se < H₂Te : Increasing pK_a values

D

NH₃ < PH₃ < AsH₃ < SbH₃ : Increasing acidic character

Question 25: Palette 25/93

NEET 2020 MCQ

Which of the following is not correct about carbon monoxide?

A

It reduces oxygen carrying ability of blood.

B

The carboxyhemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.

C

It produced due to incomplete combustion.

D

It forms carboxyhaemoglobin.

Question 26: Palette 26/93

NEET 2020 MCQ

Match the following and identify the correct option.

(A)	CO(g) + H2(g)	(i)	Mg(HCO3)2 + Ca(HCO3)2
(B)	Temporary hardness of water	(ii)	An electron deficient hydride
(C)	B2H6	(iii)	Synthesis gas
(D)	H2O2	(iv)	Non-planar structure

A

(A)	(B)	(C)	(D)
(iii)	(ii)	(i)	(iv)

B

(A)	(B)	(C)	(D)
(iii)	(iv)	(ii)	(i)

C

(A)	(B)	(C)	(D)
(i)	(iii)	(ii)	(iv)

D

(A)	(B)	(C)	(D)
(iii)	(i)	(ii)	(iv)

Question 27: Palette 27/93

NEET 2020 MCQ

Identify the correct statements from the following :
(A) CO₂(g) is used as refrigerant for ice-cream and frozen food.
(B) The structure of C₆₀ contains twelve six-carbon rings and twenty five carbon rings.
(C) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(D) CO is colourless and odourless gas.

A

(A) and (C) only

B

(B) and (C) only

C

(C) and (D) only

D

(A), (B) and (C) only

Question 28: Palette 28/93

NEET 2020 MCQ

Which of the following oxoacid of sulphur has $ - $ O$ - $ O$ - $ linkage?

A

H₂SO₄, sulphuric acid

B

H₂S₂O₈, peroxodisulphuric acid

C

H₂S₂O₇, pyrosulphuric acid

D

H₂SO₃, sulphurious acid

Question 29: Palette 29/93

NEET 2019 MCQ

Identify the incorrect statement related to PCl₅ from the following :

A

Axial P–Cl bonds are longer than equatorial P–Cl bonds

B

PCl₅ molecule is non-reactive

C

Three equatorial P–Cl bonds make an angle of 120º with each other

D

Two axial P–Cl bonds make an angle of 180º with each other

Question 30: Palette 30/93

NEET 2019 MCQ

Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code :

A

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

B

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

C

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

D

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

Question 31: Palette 31/93

NEET 2019 MCQ

Which of the following species is not stable?

A

[Sn(OH)₆]^2-

B

[SiCl₆]^2–

C

[SiF₆]^2–

D

[GeCl₆]^2–

Question 32: Palette 32/93

NEET 2019 MCQ

Which is the correct thermal stability order for H₂E (E = O, S, Se, Te and Po)?

A

H₂Po < H₂Te < H₂Se < H₂S < H₂O

B

H₂Se < H₂Te < H₂Po < H₂O < H₂S

C

H₂S < H₂O < H₂Se < H₂Te < H₂Po

D

H₂O < H₂S < H₂Se < H₂Te < H₂Po

Question 33: Palette 33/93

NEET 2019 MCQ

Match the following :

(a) Pure nitrogen	(i) Chlorine
(b) Haber process	(ii) Sulphuric acid
(c) Contact process	(iii) Ammonia
(d) Deacon’s process	(iv) Sodium azide or Barium azide

Which of the following is the correct option?

A

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

B

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

C

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

D

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

Question 34: Palette 34/93

NEET 2019 MCQ

Which of the following is incorrect statement?

A

GeX₄(X = F, Cl, Br, I) is more stable than GeX₂

B

SnF₄ is ionic in nature

C

PbF₄ is covalent in nature

D

SiCl₄ is easily hydrolysed

Question 35: Palette 35/93

NEET 2018 MCQ

Which of the following statements is not true for halogens?

A

All are oxidizing agents.

B

All form monobasic oxyacids.

C

All but fluorine show positive oxidation states.

D

Chlorine has the highest electron-gain enthalpy.

Question 36: Palette 36/93

NEET 2018 MCQ

Which one of the following elements is unable to form MF₆^3– ion?

A

Ga

B

Al

C

B

D

In

Question 37: Palette 37/93

NEET 2017 MCQ

In which pair of ions both the species contain S $-$ S bond?

A

S₄O₆^2$-$, S₂O₃^2$-$

B

S₂O₇^2$-$, S₂O₈^2$-$

C

S₄O₆^2$-$, S₂O₇^2$-$

D

S₂O₇^2$-$, S₂O₃^2$-$

Question 38: Palette 38/93

NEET 2017 MCQ

It is because of inability of ns² electrons of the valence shell to participate in bonding that

A

Sn²⁺ is oxidising while Pb⁴⁺ is reducing

B

Sn²⁺ and Pb²⁺ are both oxidising and reducing

C

Sn⁴⁺ is reducing while Pb⁴⁺ is oxidising

D

Sn²⁺ is reducing while Pb⁴⁺ is oxidising

Question 39: Palette 39/93

NEET 2017 MCQ

Match the interhalogen compounds of column-I with the geometry in column-II and assign the correct code.

Column ${\rm I}$			Column ${\rm I}$${\rm I}$
(A)	XX'		(i)	T-shape
(B)	XX'3		(ii)	Pentagonal bipyramidal
(C)	XX'5		(iii)	Linear
(D)	XX'7		(iv)	Square pyramidal
			(v)	Tetrahedral

A

(A) $ \to $ (iii);  (B) $ \to $ (i);  (C) $ \to $ (iv);  (D) $ \to $ (ii)

B

(A) $ \to $ (v);  (B) $ \to $ (iv);  (C) $ \to $ (iii);  (D) $ \to $ (ii)

C

(A) $ \to $ (iv);  (B) $ \to $ (iii);  (C) $ \to $ (ii);  (D) $ \to $ (i)

D

(A) $ \to $ (iii);  (B) $ \to $ (iv);  (C) $ \to $ (i);  (D) $ \to $ (ii)

Question 40: Palette 40/93

NEET 2016 MCQ

Boric acid is an acid because its molecule

A

contains replaceable H⁺ ion

B

gives up a proton

C

accepts OH^$-$ from water releasing proton

D

combines with proton from water molecule.

Question 41: Palette 41/93

NEET 2016 MCQ

AlF₃ is soluble in HF only in presence of KF. It is due to the formation of

A

K₃[AlF₃H₃]

B

K₃[AlF₆]

C

AlH₃

D

K[AlF₃H]

Question 42: Palette 42/93

NEET 2016 MCQ

Among the following the correct order of acidity is

A

HClO₂ < HClO < HClO₃ < HClO₄

B

HClO₄ < HClO₂ < HClO < HClO₃

C

HClO₃ < HClO₄ < HClO₂ < HClO

D

HClO < HClO₂ < HClO₃ < HClO₄

Question 43: Palette 43/93

NEET 2016 MCQ

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option

Column ${\rm I}$			Column ${\rm I}$${\rm I}$
(A)	XeF6		(i)	distorted octahedral
(B)	XeO3		(ii)	square planar
(C)	XeOF4		(iii)	pyramidal
(D)	XeF4		(iv)	square pyramidal

A

(A) $ \to $ (iv);  (B) $ \to $ (iii);  (C) $ \to $ (i);  (D) $ \to $ (ii)

B

(A) $ \to $ (iv);  (B) $ \to $ (i);  (C) $ \to $ (ii);  (D) $ \to $ (iii)

C

(A) $ \to $ (i);  (B) $ \to $ (iii);  (C) $ \to $ (iv);  (D) $ \to $ (ii)

D

(A) $ \to $ (i);  (B) $ \to $ (ii);  (C) $ \to $ (iv);  (D) $ \to $ (iii)

Question 44: Palette 44/93

NEET 2016 MCQ

When copper is heated with conc. HNO₃ it produces

A

Cu(NO₃)₂, NO and NO₂

B

Cu(NO₃)₂ and N₂O

C

Cu(NO₃)₂ and NO₂

D

Cu(NO₃)₂ and NO

Question 45: Palette 45/93

NEET 2016 MCQ

Which is the correct statement for the given acids?

A

Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.

B

Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.

C

Both are diprotic acids.

D

Both are triprotic acids.

Question 46: Palette 46/93

NEET 2016 MCQ

Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

A

Br₂ > I₂ > F₂ > Cl₂

B

F₂ > Cl₂ > Br₂ > I₂

C

I₂ > Br₂ > Cl₂ > F₂

D

Cl₂ > Br₂ > F₂ > I₂

Question 47: Palette 47/93

NEET 2015 MCQ

Which of the statements given below is incorrect?

A

O₃ molecule is bent.

B

ONF is isoelectronic with O₂N

C

OF₂ is an oxides of fluorine.

D

Cl₂O₇ is an anhydride of perchloric acid.

Question 48: Palette 48/93

NEET 2015 MCQ

Strong reducing behavior of H₃PO₂ is due to

A

high electron gain enthalpy of phosphorus

B

high oxidation state of phosphorus

C

presence of two $-$OH groups and one P$-$H bond

D

presence of one $-$OH group and two P$-$H bonds.

Question 49: Palette 49/93

NEET 2015 MCQ

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence

A

Al < Ga < In < Tl

B

Tl < In < Ga < Al

C

In < Tl < Ga < Al

D

Ga < In < Al < Tl

Question 50: Palette 50/93

NEET 2015 MCQ

The formation of the oxide ion, O^2$-$_(g) from oxygen atom requires first an exthermic and then an endothermic step as shown below:
O_(g) + e^$-$ $ \to $ O^$-$_(g);  $\Delta $_fH^o = $-$141 kJ mol^$-$1

O^$-$_(g) + e^$-$ $ \to $ O^2$-$_(g);  $\Delta $_fH^o = +780 kJ mol^$-$1

Thus, process of formation of O^2$-$ is isoelectronic with neon. It is due to the fact that,

A

O^$-$ ion has comparatively smaller size than oxygen atom

B

oxygen is more electronegative

C

addition of electron in oxygen results in larger size of the ion

D

electron repulsion outweighs the stability gained by achieving noble gas configuration.

Question 51: Palette 51/93

NEET 2015 MCQ

The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl.

What explains the higher boiling point of hydrogen fluoride?

A

There is strong hydrogen bonding between HF molecules.

B

The bond energy of HF molecules is greater than in other hydrogen halides.

C

The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.

D

The electronegativity of fluorine is much higher than for other elements in the group.

Question 52: Palette 52/93

NEET 2015 MCQ

Nitrogen dioxide and sulphur dioxide have some properties in common . Which property is shown by one of these compounds , but not by the other?

A

Is soluble in water.

B

Is used as a food preservative.

C

Forms 'acid-rain'.

D

Is a reducing agent.

Question 53: Palette 53/93

NEET 2014 MCQ

Acidity of diprotic acids in aqueous solutions increases in the order

A

H₂S < H₂Se < H₂Te

B

H₂Se < H₂S < H₂Te

C

H₂Te < H₂S < H₂Se

D

H₂Se < H₂Te < H₂S

Question 54: Palette 54/93

NEET 2013 MCQ

Identify the incorrect statement, regarding the molecule XeO₄ :

A

XeO₄ molecule is square planar.

B

There are four p$\pi $ - d$\pi $ bonds.

C

There are four sp³ - p, $\sigma $ bonds.

D

XeO₄ molecule is tetrahedral.

Question 55: Palette 55/93

NEET 2013 MCQ

Which statement is wrong?

A

Beryl is an example of cyclic silicate.

B

Mg₂SiO₄ is orthosilicate.

C

Basic structural unit in silicates is the SiO₄ tetrahedron.

D

Feldspars are not aluminosilicates.

Question 56: Palette 56/93

NEET 2013 MCQ

The basic structural unit of silicates is

A

SiO₃^2$-$

B

SiO$_4^{2 - }$

C

SiO^$-$

D

SiO$_4^{4 - }$

Question 57: Palette 57/93

NEET 2013 MCQ

Which of the following does not give oxygen on heating?

A

K₂Cr₂O₇

B

(NH₄)₂Cr₂O₇

C

KClO₃

D

Zn(ClO₃)₂

Question 58: Palette 58/93

NEET 2013 MCQ

Which of these is not a monomer for a high molecular mass silicone polymer?

A

Me₃SiCl

B

PhSiCl₃

C

MeSiCl₃

D

Me₂SiCl₂

Question 59: Palette 59/93

NEET 2013 MCQ

Which of the following structure is similar to graphite?

A

B₄C

B

B₂H₆

C

BN

D

B

Question 60: Palette 60/93

NEET 2013 MCQ

Which one of the following molecules contains no $\pi $ bond?

A

SO₂

B

NO₂

C

CO₂

D

H₂O

Question 61: Palette 61/93

NEET 2013 MCQ

Which is the strongest acid in the following?

A

HClO₄

B

H₂SO₃

C

H₂SO₄

D

HClO₃

Question 62: Palette 62/93

NEET 2012 MCQ

In which of the following arrangements the given sequence is not strictly according to the property indicated against it?

A

HF < HCl < HBr < HI : increasing acidic strength

B

H₂O < H₂S < H₂Se < H₂Te : increasing pK_a values

C

NH₃ < PH₃ < AsH₃ < SbH₃ : increasing acidic character

D

CO₂ < SiO₂ < SnO₂ < PbO₂ : increasing oxidising power

Question 63: Palette 63/93

NEET 2012 MCQ

Which of the following statements is not valid for oxoacids of phosphorus?

A

Orthophosphoric acid is used in the manufacture of triple superphosphate.

B

Hypophosphorous acid is a diprotic acid.

C

All oxoacids contain tetrahedral four coordinated phosphorus.

D

All oxoacids contain atleast one P$=$O unit and one P$-$OH group.

Question 64: Palette 64/93

NEET 2012 MCQ

Sulphur trioxide can be obtained by which of the following reaction?

A

CaSO₄ + C $\buildrel \Delta \over \longrightarrow $

B

Fe₂(SO₄)₃ $\buildrel \Delta \over \longrightarrow $

C

S + H₂SO₄ $\buildrel \Delta \over \longrightarrow $

D

H₂SO₄ + PCl₅ $\buildrel \Delta \over \longrightarrow $

Question 65: Palette 65/93

NEET 2012 MCQ

In which of the following compounds, nitrogen exhibits highest oxidation state?

A

N₂H₄

B

NH₃

C

N₃H

D

NH₂OH

Question 66: Palette 66/93

NEET 2011 MCQ

Which of the following oxide is amphoteric?

A

SnO₂

B

CaO

C

SiO₂

D

CO₂

Question 67: Palette 67/93

NEET 2011 MCQ

Which of the following statements is incorrect?

A

Pure sodium metal dissolves in liquid ammonia to give blue solution.

B

NaOH reacts with glass to give sodium silicate.

C

Aluminium reacts with excess NaOH to give Al(OH)₃.

D

NaHCO₃ on heating gives Na₂CO₃.

Question 68: Palette 68/93

NEET 2011 MCQ

Name the two type of the structure of silicate in which one oxygen atom of [SiO₄]^4$-$ is shared?

A

Linear chain silicate

B

Sheet silicate

C

Pyrosilicate

D

Three dimensional

Question 69: Palette 69/93

NEET 2011 MCQ

The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so it

A

decomposes Na₂S and NaCN, formed

B

helps in the precipitation of AgCl

C

increases the solubility product of AgCl

D

increases the concentration of N$_3^ - $ ions

Question 70: Palette 70/93

NEET 2010 MCQ

How many bridging oxygen atoms are present in P₄O₁₀?

A

6

B

4

C

2

D

5

Question 71: Palette 71/93

NEET 2010 MCQ

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence

A

BCl₃ > BF₃ > BBr₃

B

BBr₃ > BCl₃ > BF₃

C

BBr₃ > BF₃ > BCl₃

D

BF₃ > BCl₃ > BBr₃

Question 72: Palette 72/93

NEET 2010 MCQ

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

A

Cl₂O < ClO₂ < ClO$_2^ - $

B

ClO₂ < Cl₂O < ClO$_2^ - $

C

Cl₂O < ClO$_2^ - $ < ClO₂

D

ClO$_2^ - $ < Cl₂O < ClO₂

Question 73: Palette 73/93

NEET 2010 MCQ

Oxidation states of P in H₄P₂O₅, H₄P₂O₆, H₄P₂O₇ are respectively

A

+3, +5, +4

B

+5, +3, +4

C

+5, +4, +3

D

+3, +4, +5

Question 74: Palette 74/93

NEET 2010 MCQ

Which one of the following molecular hydrides acts as a Lewis acid?

A

NH₃

B

H₂O

C

B₂H₆

D

CH₄

Question 75: Palette 75/93

NEET 2009 MCQ

The straight chain polymer is formed by

A

hydrolysis of CH₃SiCl₃ followed by condensation polymerisation

B

hydrolysis of (CH₃)₄Si by addition polymerisation

C

hydrolysis of (CH₃)₂SiCl₂ followed by condensation polymerisation

D

hydrolysis of (CH₃)₃SiCl followed by condensation polymerisation.

Question 76: Palette 76/93

NEET 2009 MCQ

Among the following which is the strongest oxidising agent?

A

Br₂

B

I₂

C

Cl₂

D

F₂

Question 77: Palette 77/93

NEET 2009 MCQ

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence

A

Al < Ga < In < Tl

B

Tl < In < Ga < Al

C

In < Tl < Ga < Al

D

Ga < In < Al < Tl

Question 78: Palette 78/93

NEET 2008 MCQ

The angular shape of ozone molecule (O₃) consists of

A

1$\sigma $ and 1$\pi $ bond

B

2$\sigma $ and 1$\pi $ bond

C

1$\sigma $ and 2$\pi $ bonds

D

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

Question 79: Palette 79/93

NEET 2007 MCQ

Which of the following anions is present in the chain structure of silicates?

A

(Si₂O$_5^{2 - }$)_n

B

(SiO$_3^{2 - }$)_n

C

SiO$_4^{4 - }$

D

Si₂O$_7^{6 - }$

Question 80: Palette 80/93

NEET 2007 MCQ

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

A

HOClO < HOCl < HOClO₃ < HOClO₂

B

HOClO₂ < HOClO₃ < HOClO < HOCl

C

HOClO₃ < HOClO₂ < HOClO < HOCl

D

HOCl < HOClO < HOClO₂ < HOClO₃

Question 81: Palette 81/93

NEET 2007 MCQ

Which of the following oxidation states are the most characteristic for lead and tin respectively?

A

+2, +4

B

+4, +4

C

+2, +2

D

+4, +2

Question 82: Palette 82/93

NEET 2006 MCQ

The correct order regarding the electronegativity of hybrid orbitals of carbon is

A

sp < sp² < sp³

B

sp > sp² < sp³

C

sp > sp² > sp³

D

sp < sp² > sp³

Question 83: Palette 83/93

NEET 2006 MCQ

In which of the following molecules are all the bonds are not equal?

A

NF₃

B

ClF₃

C

BF₃

D

AlF₃

Question 84: Palette 84/93

NEET 2006 MCQ

Which of the following is the most basic oxide?

A

SeO₂

B

Al₂O₃

C

Sb₂O₃

D

Bi₂O₃

Question 85: Palette 85/93

NEET 2005 MCQ

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

A

HOClO < HOCl < HOClO₃ < HOClO₂

B

HOClO₃ < HOClO₂ < HOClO < HOCl

C

HOClO₂ < HOClO₃ < HOClO < HOCl

D

HOCl < HOClO < HOClO₂ < HOClO₃

Question 86: Palette 86/93

NEET 2005 MCQ

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

A

CO₂

B

SiO₂

C

SO₂

D

ClO₂

Question 87: Palette 87/93

NEET 2005 MCQ

What is the correct relationship between the pH of isomolar solutions of sodium oxide, Na₂O (pH₁), sodium sulphide, Na₂S (pH₂), sodium srlenide, Na₂Se (pH₃) and sodium telluride Na₂Te (pH₄)?

A

pH₁ > pH₂ > pH₃ > pH₄

B

pH₁ > pH₂ $ \approx $ pH₃ > pH₄

C

pH₁ < pH₂ < pH₃ < pH₄

D

pH₁ < pH₂ < pH₃ $ \approx $ pH₄

Question 88: Palette 88/93

NEET 2004 MCQ

Which one of the following statements about the zeolite is false?

A

They are used as cation exchangers.

B

They have open structure which enables them to take up small molecules.

C

Zeolites are aluminosilicates having three dimensional network.

D

Some of the SiO$_4^{4 - }$ units are replaced by AlO$_4^{5 - }$ and AlO$_6^{9 - }$ ions in zeolites.

Question 89: Palette 89/93

NEET 2004 MCQ

Among K, Ca, Fe and Zn, the element which can from more than one binary compound with chlorine is

A

Fe

B

Zn

C

K

D

Ca

Question 90: Palette 90/93

NEET 2003 MCQ

Which one of the following compounds is not a protonic acid?

A

B(OH)₃

B

PO(OH)₃

C

SO(OH)₂

D

SO₂(OH)₂

Question 91: Palette 91/93

NEET 2003 MCQ

Which one of the following statements is not true?

A

Among halide ions, iodide is the most powerful reducing agent.

B

Fluorine is the only halogen that does not show a variable oxidation state.

C

HOCl is a stronger acid than HOBr.

D

HF is a stronger acid than HCl.

Question 92: Palette 92/93

NEET 2002 MCQ

Which of the following statement is true?

A

Silicon exhibits 4 coordination number in its compound.

B

Bond energy of F₂ is less than Cl₂.

C

Mn(III) oxidation state is more stable than Mn(II) in aqueous state.

D

Elements of 15^th group shows only + 3 and +5 oxidation states.

Question 93: Palette 93/93

NEET 2000 MCQ

Which compound is electron deficient?

A

BeCl₂

B

BCl₃

C

CCl₄

D

PCl₅