Are these NEET questions free to attempt?

Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.

Do I need an account to practise NEET MCQs?

No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.

Are these previous year NEET questions?

The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.

NEET NEET Questions — Free MCQ Practice

● ● ● ● ●

Assertion : The number of unpaired electrons in the following gaseous ions:

${Mn}^{3 +}, {Cr}^{3 +}, V^{3 +} and {Ti}^{3 +}$ are 4, 3, 2 and 1 respectively

Reason : ${Cr}^{3 +}$ is stable in aqueous solution.

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion C. If the assertion is true but the reason is false D. If both the assertion and reason are false

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(B) ${Mn}^{3 +} = {[Ar]}^{18} 3 d^{4}, {Cr}^{3 +} = {[Ar]}^{18} 3 d^{3}, V^{3 +} = {[Ar]}^{18} 3 d^{2}, {Ti}^{3 +} = {[Ar]}^{18} 3 d^{1} and {Cr}^{3 +}$ is most

stable due to greater CFSE of $t_{2 g}^{3}$ configuration.

● ● ● ● ●

Assertion : Cuprous ion $({Cu}^{+})$ is colourless whereas cupric ion $({Cu}^{2 +})$ produces blue colour in solution.

Reason : Cuprous ion $({Cu}^{+})$ has unpaired electrons while cupric ion $({Cu}^{2 +})$ does not.

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion C. If the assertion is true but the reason is false D. If both the assertion and reason are false

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(C) Cupric ion produces blue colour in solution due to the presence of unpaired electron (d-d transition)

while cuprous ion does not have unpaired electron.

● ● ● ● ●

Assertion : Ammonical silver nitrate converts glucose to gluconic acid and metallic silver is precipitated.

Reason : Glucose acts as a weak reducing agent.

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion C. If the assertion is true but the reason is false D. If both the assertion and reason are false

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(A) ${Ag}_{2} O + C_{6} H_{12} O_{6} \overset{}{\to} 2 Ag + C_{6} H_{12} O_{7}$

● ● ● ● ●

Assertion : To a solution of potassium chromate if a strong acid is added it changes its colour from

yellow to orange.

Reason : The colour change is due to the oxidation of potassium chromate.

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion C. If the assertion is true but the reason is false D. If both the assertion and reason are false

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

$(C) 2 \overset{+ 6}{Cr} O_{4}^{2 -} + 2 H^{+} \overset{+ 6}{{Cr}_{2}} O_{7}^{2 -} + H_{2} O (yellow) (orange)$

There is no change in oxidation state. So the explanation is wrong.

● ● ● ● ●

Which one of the following statements is not correct

A.

Nickel forms Ni(CO)₄

B.

All the transition metals form mono metallic carbonyls

C.

Carbonyl are formed by transition metals

D.

Transition metals form complexes

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

Always transition metals combines with more than one carbonyl group.

● ● ● ● ●

Which of the following pairs of compounds are more stable

A.

$K_{2} [N i C l_{6}], [P t (C N)_{4}]^{2 -}$

B.

NiCl₄, PtCl₄

C.

$[N i (C N)_{4}]^{2 -}, K_{2} [P t (C l_{6})]$

D.

PtCl₂, NiCl₂

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

By comparing the value of ionization energies the thermodynamic stability of transition metal compound can be compared. Ionization value shows that Ni(II) compound are more stable than Pt(II) compund while Pt(IV) compound are relatively more stable than Ni(IV).

● ● ● ● ●

The radius of La³⁺ (atomic number of La=57) is 1.06 $\overset{o}{A}$ . Which one of the following given values will be closest to the radius of Lu³⁺ (atomic number of Lu =71)

A.

1.60 $\overset{o}{A}$

B.

1.40 $\overset{o}{A}$

C.

1.96 $\overset{o}{A}$

D.

0.85 $\overset{o}{A}$

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The ionic radius of Lu³⁺ is 0.87 $\overset{o}{A}$ , which is very close to the value 0.85 $\overset{o}{A}$ .This decrease in the ionic radius is due to lanthanoid contraction.

● ● ● ● ●

By calculating E^o value of the following reaction,which one of the following reaction are spontaneous.

Given

$E_{C u^{2 +} / C u}^{o} = 0.34 V, E_{Z n^{2 +} / Z n}^{o} = - 0.76 V, E_{A g^{+} / A g}^{o} = 0.80 V . (a) 2 A g + Z n^{2 +} \to 2 A g^{+} + Z n (b) C u + Z n^{2 +} \to Z n + C u^{2 +} (c) Z n + C u^{2 +} \to Z n^{2 +} + C u (d) 2 A g^{+} + C u \to 2 A g + C u^{2 +}$

A.

Only d

B.

Only b

C.

Both c & d

D.

Both a & c

You've reached today's free limit of 20 questions. Log in to keep practising for free.

● ● ● ● ●

Which of the following has maximum number of unpaired electrons?

A.

Fe²⁺

B.

Fe³⁺

C.

Co³⁺

D.

Co²⁺

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

Fe3+ has the maximum number of unpaired electrons (5 unpaired electrons) among the given options. The electronic configuration of Fe3+ is [Ar] 3d5, where all five 3d electrons are unpaired, aligning their spins parallel due to the strong exchange energy.

● ● ● ● ●

The atomc number of potassium is 19 & that of manganese is 25. Although the colour of MnO₄^- is dark violet yet the K⁺ is colourless.This is due to the fact that

A.

Mn is a transition element; while K⁺ is not

B.

[MnO₄]^- is negatively charged; while K⁺ has a positive charge.

C.

The effective atomic number of Mn in [MnO₄]^- is 26; while for K⁺ , the atomic number s 18

D.

The Mn in a high positive oxidation state allow charge transfer transitions.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

In [MnO₄]^-the oxidation state of Mn is +7 (d^o configuration),expected to be colourless but [MnO₄]^-is coloured due to transfer of charge from oxygen to manganese.

NEET Practice Questions (MCQs) with Answers & Solutions

Frequently Asked Questions