Blog Log in Get Started Free

NEET Practice Questions (MCQs) with Answers & Solutions

Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology

● ● ● ● ●

KOH can be prepared-

By the electrolysis of potassium chloride solution

By the action of barium hydroxide on potassium sulphate

By the action of lime on potassium chloride

By the action of lime on potassium carbonate.

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

Explanation

(B). $B a {(O H)}_{2} + K_{2} S O_{4} \to 2 K O H + B a S O_{4}$

● ● ● ● ●

Magnesium can be prepared by heating-

$M g C l_{2}$ with CaO at 1775 K

$M g C l_{2}$ with $C a C_{2}$ at 1775 K

$M g C l_{2}$ with $C a {(O H)}_{2}$ under pressure

MgO with $C a C_{2}$ at ordinary temperature

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

Explanation

(B). $M g C l_{2} + C a C_{2} \to M g + C a C l_{2} + 2 C$

● ● ● ● ●

Nitrolim (a nitrogenous fertilizer) is a mixture of-

Calcium carbide and calcium cyanamide

Calcium oxide and calcium carbide

Calcium cyanamide and carbon

Calcium oxide and carbon

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

Explanation

(C). $C a C_{2} + N_{2} \overset{1000 ° C}{\to} \underset{C a l . c y n a m i d e N i t r o l i m}{C a C N_{2} + C}$

● ● ● ● ●

When magnesium ribbon is heated to redness in an atmosphere of nitrogen and subsequently cooled with water, the gas evolved is-

$N_{2}$

$N H_{3}$

$H_{2}$

$C O_{2}$

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

Explanation

(B). Magnesium reacts with nitrogen to form magnesium nitride $M g_{3} N_{2}$ as a greenish yellow amorphous powder. It reacts with water forming magnesium hydroxide and ammonia.

$M g_{3} N_{2} + 6 H_{2} O \to 3 M g {(O H)}_{2} + 2 N H_{3}$

● ● ● ● ●

Magnesium hydride can be prepared by the action of-

Lithium hydride on magnesium chloride

Aluminium hydride on magnesium chloride

Lithium aluminium hydride on magnesium chloride

Lithium magnesium hydride on lithium chloride

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

Explanation

(C). $2 M g C l_{2} + C O_{2} + L i A l H_{4} \to 2 M g H_{2} + L i C l + A l C l_{3}$

● ● ● ● ●

Calcium can be obtained by the electrolysis of-

$C a C l_{2}$ and $C a F_{2}$

$C a {(O H)}_{2}$

$C a C l_{2}$

$C a F_{2}$

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

Explanation

(A). Ca is obtained by the electrolysis of a fused mixture (m.p. 644 $°$ C) of $C a C l_{2}$ (m.p. 774 $°$ C) containing about 16% $C a F_{2}$ (m.p. 1378 $°$ C)

● ● ● ● ●

Point out the incorrect statement regarding Be (II) group

It forms an ionic carbide

Its carbonate decomposes on heating

Its halides are covalent

It is easily attacked by water

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

Explanation

(D). It has maximum tendency to form covalent compounds among IIA group elements and does not decompose water even on boiling with it.

● ● ● ● ●

Li has the maximum value of ionisation potential among alkali metals i.e. lithium has the minimum tendency to ionise to give $L i^{+}$ ion. Thus, in aq. solution lithium is-

Strongest reducing agent

Poorest reducing agent

Strongest oxidising agent

Poorest oxidising agent

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

Explanation

(A). The ionisation potential value of Lithium is maximum among alkali metals i.e. its tendency to ionise to give $L i^{+}$ ions should be the minimum i.e. Li should be the poorest reducing agent. But, lithium is the strongest reducing agent in aq. solution. This is due to the largest value of hydration energy of $L i^{+}$ ions.

● ● ● ● ●

Considering greater polarisation in LiCl compared to that in NaCl, which of the following statement is wrong –

The m.p of LiCl is lower than that of NaCl

LiCl dissolves more in organic solvent than NaCl

LiCl will ionise in water more than NaCl

Fused LiCl would be less conducing than fused NaCl

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

Explanation

(C). Due to greater polarisation by $L i^{+}$ ion, LiCl acquires some covalent character. Thus the ionisation of LiCl will be less than that of NaCl in water.

● ● ● ● ●

A chloride dissolves appreciably in cold water. When placed in a platinum wire in Bunsen flame no distinctive colour is noticed. Which cation could be present –

$B e^{2 +}$

$B a^{2 +}$

$P b^{2 +}$

$C a^{2 +}$

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

Explanation

(A). $B e C l_{2}$ is hygroscopic and fumes in air due to hydrolysis. It is also covalent in nature due to small size and relatively high charge on $B e^{2 +}$ ion. Due to small size electrons in Be are tightly held by nuclear forces and they are not excited to higher energy levels. Thus Be does not give flame colouration.

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

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.

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

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