Question 1: Palette 1/47

NEET 2025 MCQ

Which one of the following reactions does NOT belong to "Lassaigne's test"?

A

$\mathrm{Na}+\mathrm{X} \xrightarrow[\Delta]{ }+\mathrm{NaX}$

B

$2 \mathrm{CuO}+\mathrm{C} \xrightarrow[\Delta]{ } 2 \mathrm{Cu}+\mathrm{CO}_2$

C

$\mathrm{Na}+\mathrm{C}+\mathrm{N} \underset{\Delta}{\longrightarrow} \mathrm{NaCN}$

D

$2 \mathrm{Na}+\mathrm{S} \underset{\Delta}{\longrightarrow} \mathrm{Na}_2 \mathrm{~S}$

Question 2: Palette 2/47

NEET 2023 MCQ

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

Assertion (A) : Lithium and beryllium unlike their other respective group members form compounds with pronounced ionic character.

Reason (R) : Lithium and Magnesium have similar properties due to diagonal relationship.

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

A

(A) is true but (R) is false.

B

(A) is false but (R) is true.

C

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

D

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

Question 3: Palette 3/47

NEET 2023 MCQ

Given below are two statements : one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$ :

Assertion A : Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic.

Reason R : The deep blue solution is due to the formation of amide.

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

A

Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$.

B

$\mathbf{A}$ is true but $\mathbf{R}$ is false

C

$\mathbf{A}$ is false but $\mathbf{R}$ is true

D

Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$.

Question 4: Palette 4/47

NEET 2023 MCQ

Which one of the following statements is correct?

A

All enzymes that utilise ATP in phosphate transfer require $\mathrm{Ca}$ as the cofactor.

B

The bone in human body is an inert and unchanging substance.

C

$\mathrm{Mg}$ plays roles in neuromuscular function and interneuronal transmission.

D

The daily requirement of $\mathrm{Mg}$ and $\mathrm{Ca}$ in the human body is estimated to be 0.2 - 0.3 $\mathrm{g}$.

Question 5: Palette 5/47

NEET 2023 MCQ

Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is :

A

32

B

30

C

18

D

16

Question 6: Palette 6/47

NEET 2022 MCQ

The element used for welding metals with high melting points is

A

He

B

Cl₂

C

H₂

D

Ne

Question 7: Palette 7/47

NEET 2022 MCQ

CaCl₂ and Ca(OCl)₂ are components of

A

Lime water

B

Gypsum

C

Portland cement

D

Bleaching powder

Question 8: Palette 8/47

NEET 2022 MCQ

Which one of the following is not a calcination reaction?

A

CaCO₃ + 2HCl $\buildrel \Delta \over \longrightarrow $ CaCl₂ + H₂O + CO₂

B

ZnCO₃ $\buildrel \Delta \over \longrightarrow $ ZnO + CO₂

C

Fe₂O₃ . xH₂O $\buildrel \Delta \over \longrightarrow $ Fe₂O₃ + xH₂O

D

CaCO₃ . MgCO₃ $\buildrel \Delta \over \longrightarrow $ CaO + MgO + 2CO₂

Question 9: Palette 9/47

NEET 2022 MCQ

Identify the incorrect statement from the following

A

Alkali metals react with water to form their hydroxides.

B

The oxidation number of K in KO₂ is +4.

C

Ionisation enthalpy of alkali metals decreases from top to bottom in the group.

D

Lithium is the strongest reducing agent among the alkali metals.

Question 10: Palette 10/47

NEET 2022 MCQ

Match List - I with List - II

	List - I		List - II
(a)	Li	(i)	absorbent for carbon dioxide
(b)	Na	(ii)	electrochemical cells
(c)	KOH	(iii)	coolant in fast breeder reactors
(d)	Cs	(iv)	photoelectric cell

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 11: Palette 11/47

NEET 2021 MCQ

Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :

A

Beryllium chloride

B

Calcium chloride

C

Strontium chloride

D

Magnesium chloride

Question 12: Palette 12/47

NEET 2021 MCQ

The structures of beryllium chloride in solid state and vapour phase, are :

A

Chain in both

B

Chain and dimer, respectively

C

Linear in both

D

Dimer and Linear, respectively

Question 13: Palette 13/47

NEET 2020 MCQ

The following metal ion activities many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

A

Copper

B

Calcium

C

Potassium

D

Iron

Question 14: Palette 14/47

NEET 2020 MCQ

HCl was passed through A solution of CaCl₂, MgCl₂ and NaCl. Which of the following compound(s) crystallize(s)?

A

Only NaCl

B

Only MgCl₂

C

NaCl, MgCl₂ and CaCl₂

D

Both MgCl₂ and CaCl₂

Question 15: Palette 15/47

NEET 2019 MCQ

Which of the following is an amphoteric hydroxide?

A

Mg(OH)₂

B

Be(OH)₂

C

Sr(OH)₂

D

Ca(OH)₂

Question 16: Palette 16/47

NEET 2019 MCQ

Enzymes that utilize ATP is phosphate transfer require an alkaline earth metal (M) as the cofactor. M is

A

Ca

B

Sr

C

Be

D

Mg

Question 17: Palette 17/47

NEET 2018 MCQ

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s²2s²2p³, the simplest formula for this compound is

A

Mg₂X₃

B

MgX₂

C

Mg₂X

D

Mg₃X₂

Question 18: Palette 18/47

NEET 2018 MCQ

Among CaH₂ , BeH₂ , BaH₂ , the order of ionic character is

A

BeH₂ < CaH₂ < BaH₂

B

CaH₂ < BeH₂ < BaH₂

C

BeH₂ < BaH₂ < CaH₂

D

BaH₂ < BeH₂ < CaH₂

Question 19: Palette 19/47

NEET 2017 MCQ

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

A

K

B

Rb

C

Li

D

Na

Question 20: Palette 20/47

NEET 2016 MCQ

In context with beryllium, which one of the following statements is incorrect?

A

It is rendered passive by nitric acid.

B

It forms Be₂C

C

Its salts rarely hydrolyze.

D

Its hydride is electron-deficient and polymeric.

Question 21: Palette 21/47

NEET 2016 MCQ

The suspension of slaked lime in water is known as

A

lime water

B

quick lime

C

milk of lime

D

aqueous solution of slaked lime.

Question 22: Palette 22/47

NEET 2016 MCQ

The product obtained as a result of a reaction of nitrogen with CaC₂ is

A

CaCN₂

B

Ca₂CN

C

Ca(CN)₂

D

CaCN

Question 23: Palette 23/47

NEET 2016 MCQ

Which of the following statments is false?

A

Ca²⁺ ions are not important in maintaining the regular beating of the heart.

B

Mg²⁺ ions are important in the green parts of the plants.

C

Mg²⁺ ions form a complex with ATP.

D

Ca²⁺ ions are important in blood clotting.

Question 24: Palette 24/47

NEET 2015 MCQ

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?
(At. wt. of Mg = 24)

A

96

B

60

C

84

D

75

Question 25: Palette 25/47

NEET 2015 MCQ

On heating which of the following releases CO₂ most easily?

A

Na₂CO₃

B

MgCO₃

C

CaCO₃

D

K₂CO₃

Question 26: Palette 26/47

NEET 2015 MCQ

The function of ''Sodium pump'' is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

A

K⁺

B

Fe²⁺

C

Ca²⁺

D

Mg²⁺

Question 27: Palette 27/47

NEET 2015 MCQ

Solubility of the alkaline earth metal sulphates in water decreases in the sequence

A

Sr > Ca > Mg > Ba

B

Ba > Mg > Sr > Ca

C

Mg > Ca > Sr > Ba

D

Ca > Sr > Ba > Mg

Question 28: Palette 28/47

NEET 2013 MCQ

In Castner-Kellner cell for production of sodium hydroxide

A

brine is electrolyzed using graphite electrodes

B

molten sodium chloride is electrolysed

C

sodium amalgam is formed at mercury cathode

D

brine is electrolyzed with Pt electrodes

Question 29: Palette 29/47

NEET 2012 MCQ

Which one of the alkali metals, forms only, the normal oxide, M₂O on heating in air?

A

Rb

B

K

C

Li

D

Na

Question 30: Palette 30/47

NEET 2012 MCQ

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order :

A

Li⁺ < K⁺ < Na⁺ < Rb⁺

B

Rb⁺ < K⁺ < Na⁺ < Li⁺

C

K⁺ < Na⁺ < Rb⁺ < Li⁺

D

Na⁺ < Li⁺ < K⁺ < Rb⁺

Question 31: Palette 31/47

NEET 2011 MCQ

Match List-I with List-II for the compositions of substances and select the correct answer using the code given above.

List-I (Substances)		List-II (Composition)
(A)	Plaster of Pairs	(i)	CaSO4$ \cdot $2H2O
(B)	Epsomite	(ii)	CaSO4$ \cdot $1/2 H2O
(C)	Kieserite	(iii)	MgSO4$ \cdot $7H2O
(D)	Gypsum	(iv)	MgSO4$ \cdot $H2O
		(v)	CaSO4

A

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

B

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

C

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

D

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

Question 32: Palette 32/47

NEET 2011 MCQ

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

A

CaOCl₂

B

Ca(OCl)₂

C

CaO₂Cl

D

CaCl₂

Question 33: Palette 33/47

NEET 2011 MCQ

Which of the following compounds has the lowest melting point?

A

CaCl₂

B

CaBr₂

C

CaI₂

D

CaF₂

Question 34: Palette 34/47

NEET 2010 MCQ

The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO₂ is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound is

A

CaCO₃

B

Na₂CO₃

C

K₂CO₃

D

CaSO₄$ \cdot $2H₂O

Question 35: Palette 35/47

NEET 2010 MCQ

Which one of the following compounds is a peroxide?

A

KO₂

B

BaO₂

C

MnO₂

D

NO₂

Question 36: Palette 36/47

NEET 2010 MCQ

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

A

CaSO₄

B

BeSO₄

C

BaSO₄

D

SrSO₄

Question 37: Palette 37/47

NEET 2010 MCQ

Property of the alkaline earth metals that increases with their atomic number

A

solubility of their hydroxides in water

B

solubility of their sulphates in water

C

ionization energy

D

electronegativity

Question 38: Palette 38/47

NEET 2009 MCQ

Which of the following oxides is not expected to react with sodium hydroxide?

A

CaO

B

SiO₂

C

BeO

D

B₂O₃

Question 39: Palette 39/47

NEET 2009 MCQ

In the case of alkali metals, the covalent character decreases in the order

A

MF > MCl > MBr > MI

B

MF > MCl > MI > MBr

C

MI > MBr > MCl > MF

D

MCl > MI > MBr > MF

Question 40: Palette 40/47

NEET 2008 MCQ

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?

A

MgCl₂

B

CaCl₂

C

SrCl₂

D

BaCl₂

Question 41: Palette 41/47

NEET 2008 MCQ

The sequence of ionic mobility in aqueous solution is

A

Rb⁺ > K⁺ > Cs⁺ > Na⁺

B

Na⁺ > K⁺ > Rb⁺ > Cs⁺

C

K⁺ > Na⁺ > Rb⁺ > Cs⁺

D

Cs⁺ > Rb⁺ > K⁺ > Na⁺

Question 42: Palette 42/47

NEET 2008 MCQ

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

A

NaH > LiH > KH > RbH > CsH

B

LiH > NaH > KH > RbH > CsH

C

CsH > RbH > KH > NaH > LiH

D

KH > NaH > LiH > CsH > RbH

Question 43: Palette 43/47

NEET 2007 MCQ

The correct order of increasing thermal stability of K₂CO₃, MgCO₃, CaCO₃ and BeCO₃ is

A

BeCO₃ < MgCO₃ < CaCO₃ < K₂CO₃

B

MgCO₃ < BeCO₃ < CaCO₃ < K₂CO₃

C

K₂CO₃ < MgCO₃ < CaCO₃ < BeCO₃

D

BeCO₃ < MgCO₃ < K₂CO₃ < CaCO₃

Question 44: Palette 44/47

NEET 2007 MCQ

In which of the following the hydration energy is higher than the lattice energy?

A

MgSO₄

B

RaSO₄

C

SrSO₄

D

BaSO4

Question 45: Palette 45/47

NEET 2006 MCQ

The correct order of the mobility of the alkali metal ions in aqueous solution is

A

Rb⁺ > K⁺ > Na⁺ > Li⁺

B

Li⁺ > Na⁺ > K⁺ > Rb⁺

C

Na⁺ > K⁺ > Rb⁺ > Li⁺

D

K⁺ > Rb⁺ > Na⁺ > Li⁺

Question 46: Palette 46/47

NEET 2004 MCQ

A solid compound X on heating gives CO₂ gas and a residue. The residue mixed with water forms Y. On passing an excess of CO₂ through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is

A

Ca(HCO₃)₂

B

CaCO₃

C

Na₂CO₃

D

K₂CO₃

Question 47: Palette 47/47

NEET 2002 MCQ

In which of the following processes, fused sodium hydroxide is electrolysed at a 330^oC temperature for extraction of sodium?

A

Castner's process

B

Down's process

C

Cyanide process

D

Both 'b' and 'c'