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s-Block Elements

123 Questions Start JEE Mains Test
All Exams JEE Mains JEE Advanced TS-EAMCET AP-EAPCET BITSAT
2022 Q51 JEE Mains MCQ
14 Mar 2026

Correct statement about alkali metal oxides is :

A.
peroxides are colored.
B.
superoxides are paramagnetic.
C.
oxides are paramagnetic.
D.
peroxides are both colored and paramagnetic.
2022 Q52 JEE Mains MCQ
14 Mar 2026

Amongst baking soda, caustic soda and washing soda, carbonate anion is present in :

A.
washing soda only.
B.
washing soda and caustic soda only.
C.
washing soda and baking soda only.
D.
baking soda, caustic soda and washing soda.
2022 Q53 JEE Mains MCQ
14 Mar 2026

Arrange the following in the decreasing order of their covalent character :

(A) LiCl

(B) NaCl

(C) KCl

(D) CsCl

Choose the most appropriate answer from the options given below :

A.
(A) > (C) > (B) > (D)
B.
(B) > (A) > (C) > (D)
C.
(A) > (B) > (C) > (D)
D.
(A) > (B) > (D) > (C)
2022 Q54 JEE Mains MCQ
14 Mar 2026

Match List-I with List-II

List-I
(Metal)		 List-II
(Emitted light wavelength (nm))
(A) Li (I) 670.8
(B) Na (II) 589.2
(C) Rb (III) 780.0
(D) Cs (IV) 455.5

Choose the most appropriate answer from the options given below :

A.
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
B.
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
C.
(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
D.
(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
2022 Q55 JEE Mains MCQ
14 Mar 2026

Addition of H2SO4 to BaO2 produces :

A.
BaO, SO2 and H2O
B.
BaHSO4 and O2
C.
BaSO4, H2 and O2
D.
BaSO4 and H2O2
2022 Q56 JEE Mains MCQ
14 Mar 2026

BeCl2 reacts with LiAlH4 to give :

A.
Be + Li[AlCl4] + H2
B.
Be + AlH3 + LiCl + HCl
C.
BeH2 + LiCl + AlCl3
D.
BeH2 + Li[AlCl4]
2022 Q57 JEE Mains MCQ
14 Mar 2026

s-block element which cannot be qualitatively confirmed by the flame test is :

A.
Li
B.
Na
C.
Rb
D.
Be
2022 Q58 JEE Mains MCQ
14 Mar 2026

The correct order of melting point is :

A.
Be > Mg > Ca > Sr
B.
Sr > Ca > Mg > Be
C.
Be > Ca > Mg > Sr
D.
Be > Ca > Sr > Mg
2022 Q59 JEE Mains MCQ
14 Mar 2026

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

A.
Be2+
B.
Mg2+
C.
Ca2+
D.
Sr2+
2022 Q60 JEE Mains MCQ
14 Mar 2026

In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

A.
NaOH
B.
NaCl
C.
Na metal
D.
Na2CO3
2022 Q61 JEE Mains MCQ
14 Mar 2026

Which one of the following compounds is used as a chemical in certain type of fire extinguishers?

A.
Baking soda
B.
Soda ash
C.
Washing soda
D.
Caustic soda
2022 Q62 JEE Mains MCQ
14 Mar 2026

Which of the following statements are correct?

(A) Both LiCl and MgCl2 are soluble in ethanol.

(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.

(C) LiF is less soluble in water than other alkali metal fluorides.

(D) Li2O is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below :

A.
(A) and (C) only
B.
(A), (C) and (D) only
C.
(B) and (C) only
D.
(A) and (D) only
2022 Q63 JEE Mains Numerical
14 Mar 2026

BeO reacts with HF in presence of ammonia to give [A] which on thermal decomposition produces [B] and ammonium fluoride. Oxidation state of Be in [A] is ____________.

2021 Q64 JEE Mains MCQ
14 Mar 2026
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Lithium salts are hydrated.

Reason (R) : Lithium has higher polarising power than other alkali metal group members.

In the light of the above statements, choose the most appropriate answer from the options given below :
A.
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
B.
(A) is correct but (R) is not correct.
C.
(A) is not correct but (R) is correct.
D.
Both (A) and (R) are correct and (R) is the correct explanation of (A)
2021 Q65 JEE Mains MCQ
14 Mar 2026
The major component/ingredient of Portland Cement is :
A.
tricalcium aluminate
B.
tricalcium silicate
C.
dicalcium aluminate
D.
dicalcium silicate
2021 Q66 JEE Mains MCQ
14 Mar 2026
Choose the correct statement from the following :
A.
The standard enthalpy of formation for alkali metal bromides becomes less negative on descending the group.
B.
The low solubility of CsI in water is due to its high lattice enthalpy.
C.
Among the alkali metal halides, LiF is least soluble in water.
D.
LiF has least negative standard enthalpy of formation among alkali metal fluorides.
2021 Q67 JEE Mains MCQ
14 Mar 2026
The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are :
A.
2, 0 and 1
B.
0.5, 0 and 2
C.
5, 0 and 0.5
D.
2, 0 and 0.5
2021 Q68 JEE Mains MCQ
14 Mar 2026
What are the products formed in sequence when excess of CO2 is passed in slaked lime?
A.
Ca(HCO3)2, CaCO3
B.
CaCO3, Ca(HCO3)2
C.
CaO, Ca(HCO3)2
D.
CaO, CaCO3
2021 Q69 JEE Mains MCQ
14 Mar 2026
Match List - I with List - II :

List - I List - II
(a) Li (i) photoelectric cell
(b) Na (ii) absorbent of $C{O_2}$
(c) K (iii) coolant in fast breeder nuclear reactor
(d) Cs (iv) treatment of cancer
(v) bearings for motor engines


Choose the correct answer from the options given below :
A.
(a) - (v), (b) - (i), (c) - (ii), (d) - (iv)
B.
(a) - (v), (b) - (ii), (c) - (iv), (d) - (i)
C.
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
D.
(a) - (v), (b) - (iii), (c) - (ii), (d) - (i)
2021 Q70 JEE Mains MCQ
14 Mar 2026
Given below are two statements : One is labelled as Assertion A and the other labelled as Reason R.

Assertion A : Lithium halides are some what covalent in nature.

Reason R : Lithium posses high polarisation capability.

In the light of the above statements, choose the most appropriate 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 but R is NOT the correct explanation of A
D.
Both A and R are true and R is the correct explanation of A
2021 Q71 JEE Mains MCQ
14 Mar 2026
Match List I with List II :

List-I
Elements		 List-II
Properties
(a) Li (i) Poor water solubility of ${I^ - }$ salt
(b) Na (ii) Most abundant element in cell fluid
(c) K (iii) Bicarbonate salt used in fire extinguisher
(d) Cs (iv) Carbonate salt decomposes easily on heating


Choose the correct answer from the options given below :
A.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
B.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
C.
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
D.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
2021 Q72 JEE Mains MCQ
14 Mar 2026
Given below are two statements :

Statement I : None of the alkaline earth metal hydroxides dissolve in alkali.

Statement II : Solubility of alkaline earth metal hydroxides in water increases down the group.

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.
Statement I and Statement II both are incorrect.
D.
Statement I and Statement II both are correct.
2021 Q73 JEE Mains MCQ
14 Mar 2026
Match List-I with List-II

List-I
(Elements)		 List-II
(Properties)
(a) Ba (i) Organic solvent soluble compounds
(b) Ca (ii) Outer electronic configuration $6{s^2}$
(c) Li (iii) Oxalate insoluble in water
(d) Na (iv) Formation of very strong monoacidic base


Choose the correct answer from the options given below :
A.
(a)-(ii), (b)-(iii), (c)-(i) and (d)-(iv)
B.
(a)-(iv), (b)-(i), (c)-(ii) and (d)-(iii)
C.
(a)-(iii), (b)-(ii), (c)-(iv) and (d)-(i)
D.
(a)-(i), (b)-(iv), (c)-(ii) and (d)-(iii)
2021 Q74 JEE Mains MCQ
14 Mar 2026
The set in which compounds have different nature is :
A.
B(OH)3 and H3PO3
B.
B(OH)3 and Al(OH)3
C.
NaOH and Ca(OH)2
D.
Be(OH)2 and Al(OH)3
2021 Q75 JEE Mains MCQ
14 Mar 2026
A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is :
A.
Mg
B.
Na
C.
Ca
D.
K
2021 Q76 JEE Mains MCQ
14 Mar 2026
Match List - I with List - II :

List - I List - II
(a) Be (i) treatment of cancer
(b) Mg (ii) extraction of metals
(c) Ca (iii) incendiary bombs and signals
(d) Ra (iv) windows of X-ray tubes
(v) bearings for motor engines


Choose the most appropriate answer from the option given below :
A.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
B.
(a)-(iii), (b)-(iv), (c)-(v), (d)-(ii)
C.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(v)
D.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2021 Q77 JEE Mains MCQ
14 Mar 2026
Match List - I with List - II

List - I
 List - II
(a) $Ca{(OCl)_2}$ (i) Antacid
(b) $CaS{O_4}.{1 \over 2}{H_2}O$ (ii) Cement
(c) $CaO$ (iii) Bleach
(d) $CaC{O_3}$ (iv) Plaster of paris


Choose the most appropriate answer from the options given below :
A.
(a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)
B.
(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)
C.
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
D.
(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
2021 Q78 JEE Mains MCQ
14 Mar 2026
The set of elements that differ in mutual relationship from those of the other sets is :
A.
Li - Na
B.
Be - Al
C.
B - Si
D.
Li - Mg
2021 Q79 JEE Mains MCQ
14 Mar 2026
One of the by-products formed during the recovery of NH3 from Solvay process is :
A.
Ca(OH)2
B.
NH4Cl
C.
NaHCO3
D.
CaCl2
2021 Q80 JEE Mains MCQ
14 Mar 2026
The correct order of conductivity of ions in water is :
A.
K+ > Na+ > Cs+ > Rb+
B.
Cs+ > Rb+ > K+ > Na+
C.
Na+ > K+ > Rb+ > Cs+
D.
Rb+ > Na+ > K+ > Li+
2021 Q81 JEE Mains MCQ
14 Mar 2026
Given below are two statements :

Statement I : Both CaCl2 . 6H2O and MgCl2 . 8H2O undergo dehydration on heating.

Statement II : BeO is amphoteric whereas the oxides of other elements in the same group are acidic.

In the light of the above statements, choose the correct answer from the options given below :
A.
Both statement I and statement II are false
B.
Statement I is false but statement II is true
C.
Statement I is true but statement II is false
D.
Both statement I and statement II are true
2021 Q82 JEE Mains MCQ
14 Mar 2026
Match List - I with List - II.

List I (Salt) List II (Flame colour wavelength)
(a) LiCl (i) 455.5 nm
(b) NaCl (ii) 670.8 nm
(c) RbCl (iii) 780.0 nm
(d) CsCl (iv) 589.2 nm


Choose the correct answer from the options given below :
A.
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
B.
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
C.
(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
D.
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
2020 Q83 JEE Mains MCQ
14 Mar 2026
Match the following compounds (Column-I) with their uses (Column-II) :

S.No. Column-I S.No. Column-II
(I) Ca(OH)2 (A) casts of statues
(II) NaCl (B) white wash
(III) CaSO4, ${1 \over 2}$H2O (C) antacid
(IV) CaCO3 (D) washing soda
preparation
A.
(I)-(B), (II)-(C), (III)-(D), (IV)-(A)
B.
(I)-(B), (II)-(D), (III)-(A), (IV)-(C)
C.
(I)-(C), (II)-(D), (III)-(B), (IV)-(A)
D.
(I)-(D), (II)-(A), (III)-(C), (IV)-(B)
2020 Q84 JEE Mains MCQ
14 Mar 2026
Among the sulphates of alkaline earth metals, the solubilities of BeSO4 and MgSO4 in water, respectively, are :
A.
poor and poor
B.
poor and high
C.
high and poor
D.
high and high
2020 Q85 JEE Mains MCQ
14 Mar 2026
An alkaline earth metal ‘M’ readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is :
A.
Ca
B.
Mg
C.
Sr
D.
Be
2020 Q86 JEE Mains MCQ
14 Mar 2026
On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are :
A.
Li2O, Na2O2 and K2O
B.
Li2O2, Na2O2 and K2O2
C.
Li2O, Na2O2 and KO2
D.
Li2O, Na2O and K2O2
2020 Q87 JEE Mains MCQ
14 Mar 2026
Two elements A and B have similar chemical properties. They don’t form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B, respectively, are :
A.
Li and Mg
B.
Cs and Ba
C.
Na and Rb
D.
Na and Ca
2020 Q88 JEE Mains MCQ
14 Mar 2026
The metal mainly used in devising photoelectric cells is :
A.
Na
B.
Rb
C.
Li
D.
Cs
2020 Q89 JEE Mains MCQ
14 Mar 2026
Among the statements (a)-(d) the correct ones are :

(a) Lithium has the highest hydration enthalpy among the alkali metals.

(b) Lithium chloride is insoluble in pyridine.

(c) Lithium cannot form ethynide upon its reaction with ethyne.

(d) Both lithium and magnesium react slowly with H2O.
A.
(b) and (c) only
B.
(a) and (d) only
C.
(a), (b) and (d) only
D.
(a), (c) and (d) only
2020 Q90 JEE Mains MCQ
14 Mar 2026
When gypsum is heated to 393 K, it forms :
A.
CaSO4 . 0.5H2O
B.
CaSO4 . 5H2O
C.
Dead burnt plaster
D.
Anhydrous CaSO4
2019 Q91 JEE Mains MCQ
14 Mar 2026
The INCORRECT statement is :
A.
Lithium is least reactive with water among the alkali metals
B.
LiCl crystallises from aqueous solution as LiCl.2H2O
C.
Lithium is the strongest reducing agent among the alkali metals
D.
LiNO3 decomposes on heating to give LiNO2 and O2
2019 Q92 JEE Mains MCQ
14 Mar 2026
The correct sequence of thermal stability of the following carbonates is :
A.
BaCO3 < SrCO3 < CaCO3 < MgCO3
B.
MgCO3 < CaCO3 < SrCO3 < BaCO3
C.
BaCO3 < CaCO3 < SrCO3 < MgCO3
D.
MgCO3 < SrCO3 < CaCO3 < BaCO3
2019 Q93 JEE Mains MCQ
14 Mar 2026
A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, respectively, are :
A.
Baking soda and dead burnt plaster.
B.
Washing soda and soda ash
C.
Washing soda and dead burnt plaster.
D.
Baking soda and soda as.
2019 Q94 JEE Mains MCQ
14 Mar 2026
The alloy used in the construction of aircrafts is :
A.
Mg – Zn
B.
Mg – Al
C.
Mg – Mn
D.
Mg – Sn
2019 Q95 JEE Mains MCQ
14 Mar 2026
The structures of beryllium chloride in the solid state and vapour, phase, respectively,are :
A.
chain and chain
B.
dimeric and chain
C.
chain and dimeric
D.
dimeric and dimeric
2019 Q96 JEE Mains MCQ
14 Mar 2026
Magnisium powder burns in air to give :
A.
MgO and Mg3N2
B.
MgO only
C.
Mg(NO3)2 and Mg3N2
D.
MgO and Mg(NO3)2
2019 Q97 JEE Mains MCQ
14 Mar 2026
The correct order of hydration enthapies of alkali metal ions is :
A.
Li+ > Na+ > Cs+ > Rb+
B.
Na+ > Li+ > K+ > Cs+ > Rb+
C.
Na+ > Li+ > K+ > Rb+ > Cs+
D.
Li+ > Na+ > K+ > Rb+ > Cs+
2019 Q98 JEE Mains MCQ
14 Mar 2026
A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is :
A.
Rb
B.
Mg
C.
Na
D.
Li
2019 Q99 JEE Mains MCQ
14 Mar 2026
The reaction that does NOT define calcination is :
A.
2Cu2S + 3O2 $\buildrel \Delta \over \longrightarrow $ 2Cu2O + 2SO2
B.
CaCO3 . MgCO3 $\buildrel \Delta \over \longrightarrow $ CaO + MgO + 2CO2
C.
ZnCO3 $\buildrel \Delta \over \longrightarrow $ ZnO + CO2
D.
Fe2O3 . XH2O $\buildrel \Delta \over \longrightarrow $ Fe2O3 + XH2O
2019 Q100 JEE Mains MCQ
14 Mar 2026
Match the following items in column I with the corresponding items in column II.

Item I Item II
(i) Na2CO3.10H2O (A) Portland cement ingredient
(ii) Mg(HCO3)2 (B) Castner-Kellner process
(iii) NaOH
 (C) Solvay process
(iv) Ca3Al2O6 (D) Temporary hardness
A.
(i)$ \to $(D); (ii)$ \to $(A); (iii)$ \to $(B); (iv)$ \to $(C)
B.
(i)$ \to $(B); (ii)$ \to $(C); (iii)$ \to $(A); (iv)$ \to $(D)
C.
(i)$ \to $(C); (ii)$ \to $(B); (iii)$ \to $(D); (iv)$ \to $(A)
D.
(i)$ \to $(C); (ii)$ \to $(D); (iii)$ \to $(B); (iv)$ \to $(A)