How many questions from s-Block Elements appear in JEE?

s-Block Elements has appeared in 88 of the last 186 JEE Main and JEE Advanced papers — about 47% of them — contributing 103 questions in total across those papers.

Is s-Block Elements an important chapter for JEE?

Judged by how often it is actually tested, it appears in roughly 47% of papers. Chapters above about 50% are effectively guaranteed to show up every session, so they repay thorough preparation; lower-frequency chapters are better treated as targeted revision.

Where do these s-Block Elements questions come from?

Every question is from an official JEE Main or JEE Advanced paper, transcribed from the original paper and tagged to this chapter. Answers follow the official answer key.

s-Block Elements JEE Previous Year Questions with Answers

Q1·ChemistrySingle correctJEE Main 2024

Match List-I (alkali metals) with List-II (their characteristic emission wavelengths). Choose the correct answer:

List-I (Alkali Metal)	List-II (Emission Wavelength in nm)
A.Li	I.589.2
B.Na	II.455.5
C.Rb	III.670.8
D.Cs	IV.780.0

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

Q2·ChemistryNumericalJEE Main 2024

Number of metal ions characterized by flame test among the following is ______.

Sr^{2+}

,

Ba^{2+}

,

Ca^{2+}

,

Cu^{2+}

,

Zn^{2+}

,

Co^{2+}

,

Fe^{2+}

Q3·ChemistrySingle correctJEE Main 2023

For a good quality cement, the ratio of silica to alumina is found to be

(A)3
(B)4.5
(C)2
(D)1.5

Q4·ChemistrySingle correctJEE Main 2023

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

BeCl_2

and

MgCl_2

produce characteristic flame. Reason (R): The excitation energy is high in

BeCl_2

and

MgCl_2

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

(A)Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
(B)(A) is false but (R) is true
(C)Both (A) and (R) are true and (R) is the correct explanation of (A)
(D)(A) is true but (R) is false.

Q5·ChemistrySingle correctJEE Main 2023

Better method for preparation of

BeF_2

, among the following is

(A) $(NH_4)_2BeF_4 \xrightarrow{\Delta} BeF_2$
(B) $BeH_2 + F_2 \xrightarrow{\Delta} BeF_2$
(C) $Be + F_2 \xrightarrow{\Delta} BeF_2$
(D) $BeO + C + F_2 \xrightarrow{\Delta} BeF_2$

Q6·ChemistrySingle correctJEE Main 2023

Be(OH)_{2}

reacts with

Sr(OH)_{2}

to yield an ionic salt. Choose the incorrect option related to this reaction from the following:

(A)Be is tetrahedrally coordinated in the ionic salt.
(B)The reaction is an example of acid - base neutralization reaction.
(C)Both Sr and Be elements are present in the ionic salt.
(D)The elements Be is present in the cationic part of the ionic salt.

Q7·ChemistrySingle correctJEE Main 2023

The density of alkali metals is in the order

(A)K < Cs < Na < Rb
(B)Li < K < Na < Rb < Cs
(C)K < Na < Cs < Rb
(D)Na < Rb < K < Cs

Q8·ChemistryNumericalJEE Main 2023

Mg(NO_3)_2\cdot XH_2O

and

Ba(NO_3)_2\cdot YH_2O

represent the formula of the crystalline forms of nitrate salts. The sum of X and Y is ____.

Q9·ChemistrySingle correctJEE Main 2023

The alkali metal from the following with the least melting point is:

(A)Rb
(B)K
(C)Na
(D)Cs

Q10·ChemistrySingle correctJEE Main 2023

Match List-I with List-II and choose the correct answer.

List-I	List-II
A.K	I.Thermonuclear reactions
B.KCl	II.Fertilizer
C.KOH	III.Sodium potassium pump
D.Li	IV.Absorbent of $CO_2$

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

Q11·ChemistrySingle correctJEE Main 2023

Lime reacts exothermally with water to give 'A' which has low solubility in water. Aqueous solution of 'A' is often used for the test of CO

_2

, a test in which insoluble B is formed. If B is further reacted with CO

_2

then soluble compound is formed. 'A' is

(A)Quick lime
(B)Slaked lime
(C)Lime water
(D)White lime

Q12·ChemistrySingle correctJEE Main 2023

The number of water molecules in washing soda and soda ash respectively are:

(A)10 and 1
(B)1 and 10
(C)1 and 0
(D)10 and 0

Q13·ChemistrySingle correctJEE Main 2023

What is the purpose of adding gypsum to cement?

(A)To facilitate the hydration of cement
(B)To speed up the process of setting
(C)To slow down the process of setting
(D)To give a hard mass

Q14·ChemistrySingle correctJEE Main 2023

Given below are two statements: Statement I: Lithium and Magnesium do not form superoxide. Statement II: The ionic radius of

Li^+

is larger than ionic radius of

Mg^{2+}

. In the 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)Statement I is correct but Statement II is incorrect
(C)Both Statement I and Statement II are correct
(D)Both Statement I and Statement II are incorrect

Q15·ChemistrySingle correctJEE Main 2023

For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as to:

(A)4
(B)2
(C)3
(D)1

Q16·ChemistrySingle correctJEE Main 2023

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Sodium is about 30 times as abundant as potassium in the oceans. Reason R: Potassium is bigger in size than sodium. In the light of the above statements, choose the correct answer from the options given below.

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

Q17·ChemistrySingle correctJEE Main 2023

Ion having highest hydration enthalpy among the given alkaline earth metal ions is:

(A) $Be^{2+}$
(B) $Ba^{2+}$
(C) $Sr^{2+}$
(D) $Ca^{2+}$

Q18·ChemistrySingle correctJEE Main 2023

Structure of

BeCl_2

in solid state, vapour phase and at very high temperature respectively are:

(A)Dimeric, Polymeric, Monomeric
(B)Polymeric, Dimeric, Monomeric
(C)Monomeric, Dimeric, Polymeric
(D)Polymeric, Monomeric, Dimeric

Q19·ChemistrySingle correctJEE Main 2023

The setting time of Cement is increased by adding:

(A)Clay
(B)Silica
(C)Limestone
(D)Gypsum

Q20·ChemistrySingle correctJEE Main 2023

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): An aqueous solution of KOH when used for volumetric analysis, its concentration should be checked before the use. Reason (R): On aging, KOH solution absorbs atmospheric

CO_2

. In the light of the above statements, choose the correct 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)Both (A) and (R) are correct and (R) is the correct explanation of (A)
(D)(A) is not correct but (R) is correct

Q21·ChemistrySingle correctJEE Main 2023

Choose the correct statement(s): A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere of

\text{CO}_2

. C. Beryllium sulphate is readily soluble in water. D. Beryllium shows anomalous behaviour. Choose the correct answer from the options given below:

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

Q22·ChemistrySingle correctJEE Main 2023

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Gypsum is used for making fireproof wall boards. Reason (R): Gypsum is unstable at high temperatures. In the light of the above statements, choose the correct answer from the options given below:

(A)Both (A) and (R) are correct and (R) is the correct explanation of (A)
(B)Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(C)(A) is correct but (R) is not correct
(D)(A) is not correct but (R) is correct

Q23·ChemistrySingle correctJEE Main 2023

Match List I (common name of an s-block compound) with List II (its chemical formula). Choose the correct answer from the options given below:

List I	List II
A.Slaked lime	I. $\text{NaOH}$
B.Dead burnt plaster	II. $\text{Ca(OH)}_2$
C.Caustic soda	III. $\text{Na}_2\text{CO}_3\cdot 10\text{H}_2\text{O}$
D.Washing soda	IV. $\text{CaSO}_4$

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

Q24·ChemistrySingle correctJEE Main 2023

The element playing significant role in neuromuscular function and interneuronal transmission is:

(A)Li
(B)Mg
(C)Be
(D)Ca

Q25·ChemistryNumericalJEE Main 2023

The number of alkali metal(s) from Li, K, Cs, Rb having ionization enthalpy greater than 400 kJ mol

^{-1}

and forming stable super oxide is _________

Q26·ChemistrySingle correctJEE Main 2023

Which of the following reactions is correct?

(A) $4LiNO_3 \xrightarrow{\Delta} 2Li_2O + 2N_2O_4 + O_2$
(B) $2LiNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2$
(C) $2LiNO_3 \rightarrow 2Li + 2NO_2 + O_2$
(D) $4LiNO_3 \xrightarrow{\Delta} 2Li_2O + 4NO_2 + O_2$

Q27·ChemistrySingle correctJEE Main 2023

Chlorides of which metal are soluble in organic solvents:

(A)K
(B)Be
(C)Mg
(D)Ca

Q28·ChemistrySingle correctJEE Main 2023

The alkaline earth metal sulphate(s) which are readily soluble in water is/are: A. BeSO

_4

B. MgSO

_4

C. CaSO

_4

D. SrSO

_4

E. BaSO

_4

. Choose the correct answer from the options given below:

(A)B Only
(B)A and B
(C)B and C
(D)A only

Q29·ChemistryNumericalJEE Main 2023

On heating,

LiNO_3

gives how many compounds among the following? _____

Li_2O,\,N_2,\,O_2,\,LiNO_2,\,NO_2

Q30·ChemistrySingle correctJEE Main 2023

The magnetic behavior of Li

_2

O, Na

_2

O

_2

and KO

_2

, respectively, are:

(A)Paramagnetic, paramagnetic and diamagnetic
(B)diamagnetic, paramagnetic and diamagnetic
(C)paramagnetic, diamagnetic and paramagnetic
(D)diamagnetic, diamagnetic and paramagnetic

Q31·ChemistrySingle correctJEE Main 2023

The correct order of hydration enthalpies is: (A) K

^+

(B) Rb

^+

(C) Mg

^{2+}

(D) Cs

^+

(E) Ca

^{2+}

. Choose the correct answer from the options given below:

(A)E > C > A > B > D
(B)C > A > E > B > D
(C)C > E > A > D > B
(D)C > E > A > B > D

Q32·ChemistrySingle correctJEE Main 2023

Match List-I (Elements) with List-II (Colour imparted to the flame). Choose the correct answer from the options given below:

List-I (Elements)	List-II (Colour imparted to the flame)
A.K	I.Brick Red
B.Ca	II.Violet
C.Sr	III.Apple Green
D.Ba	IV.Crimson Red

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

Q33·ChemistrySingle correctJEE Main 2023

Compound A reacts with

NH_4Cl

and forms a compound B. Compound B reacts with

H_2O

and excess of

CO_2

to form compound C which on passing through (or reaction with) saturated NaCl solution forms sodium hydrogen carbonate. Compounds A, B and C are respectively:

(A) $CaCl_2, NH_3, NH_4HCO_3$
(B) $Ca(OH)_2, NH_4^+, (NH_4)_2CO_3$
(C) $CaCl_2, NH_4^+, (NH_4)_2CO_3$
(D) $Ca(OH)_2, NH_3, NH_4HCO_3$

Q34·ChemistrySingle correctJEE Main 2023

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The alkali metals and their salts impart characteristic colour to reducing flame. Reason R : Alkali metals can be detected using flame tests. In the light of the above statements, choose the most appropriate answer from the options given below

(A)A is not correct but R is correct
(B)Both A and R are correct but R is NOT the correct explanation of A
(C)A is correct but R is not correct
(D)Both A and R are correct and R is the correct explanation of A

Q35·ChemistrySingle correctJEE Main 2023

Identify the correct statements about alkali metals. A. The order of standard reduction potential

(M^+|M)

for alkali metal ions is

Na>Rb>Li

. B. CsI is highly soluble in water. C. Lithium carbonate is highly stable to heat. D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic. E. All the alkali metal hydrides are ionic solids. Choose the correct answer from the options given below:

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

Q36·ChemistrySingle correctJEE Main 2023

Reaction of BeO with ammonia and hydrogen fluoride gives A which on thermal decomposition gives

\text{BeF}_2

and

\text{NH}_4\text{F}

. What is 'A'?

(A) $(\text{NH}_4)_2\text{BeF}_4$
(B) $\text{H}_3\text{NBeF}_3$
(C) $(\text{NH}_4)\text{Be}_2\text{F}_5$
(D) $(\text{NH}_4)\text{BeF}_3$

Q37·ChemistrySingle correctJEE Main 2023

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Beryllium has less negative value of reduction potential compared to the other alkaline earth metals. Reason R: Beryllium has large hydration energy due to small size of

Be^{2+}

but relatively large value of atomization enthalpy. In the light of the above statements, choose the most appropriate answer from the options given below

(A)A is not correct but R is correct
(B)A is correct but R is not correct
(C)Both A and R are correct and R is the correct explanation of A
(D)Both A and R are correct but R is NOT the correct explanation of A

Q38·ChemistrySingle correctJEE Main 2023

Match List I (substance / use) with List II (the chemical species involved). Choose the correct answer from the options given below:

List I	List II
A.Chlorophyll	I. $\text{Na}_2\text{CO}_3$
B.Soda ash	II. $\text{CaSO}_4$
C.Dentistry, Ornamental work	III. $\text{Mg}^{2+}$
D.Used in white washing	IV. $\text{Ca(OH)}_2$

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

Q39·ChemistrySingle correctJEE Advanced 2022

LIST-I contains compounds and LIST-II contains reactions. Match each compound in LIST-I with its formation reaction(s) in LIST-II, and choose the correct option

LIST-I	LIST-II
I. $\mathrm{H_2O_2}$	P. $\mathrm{Mg(HCO_3)_2 + Ca(OH)_2 \rightarrow}$
II. $\mathrm{Mg(OH)_2}$	Q. $\mathrm{BaO_2 + H_2SO_4 \rightarrow}$
III. $\mathrm{BaCl_2}$	R. $\mathrm{Ca(OH)_2 + MgCl_2 \rightarrow}$
IV. $\mathrm{CaCO_3}$	S. $\mathrm{BaO_2 + HCl \rightarrow}$
	T. $\mathrm{Ca(HCO_3)_2 + Ca(OH)_2 \rightarrow}$

(A)I $\rightarrow$ Q; II $\rightarrow$ P; III $\rightarrow$ S; IV $\rightarrow$ R
(B)I $\rightarrow$ T; II $\rightarrow$ P; III $\rightarrow$ Q; IV $\rightarrow$ R
(C)I $\rightarrow$ T; II $\rightarrow$ R; III $\rightarrow$ Q; IV $\rightarrow$ P
(D)I $\rightarrow$ Q; II $\rightarrow$ R; III $\rightarrow$ S; IV $\rightarrow$ P

Q40·ChemistrySingle correctJEE Main 2022

Portland cement contains 'X' to enhance the setting time. What is 'X'?

(A)CaSO $_{4}$ . $\frac{1}{2}$ H $_{2}$ O
(B)CaSO $_{4}$ .2H $_{2}$ O
(C)CaSO $_{4}$
(D)CaCO $_{3}$

Q41·ChemistrySingle correctJEE Main 2022

Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

(A) $LiNO_{2}$ and $NaNO_{2}$
(B) $Li_{2}O$ and $Na_{2}O$
(C) $Li_{2}O$ and $NaNO_{2}$
(D) $LiNO_{2}$ and $Na_{2}O$

Q42·ChemistrySingle correctJEE Main 2022

Statement I: An alloy of lithium and magnesium is used to make aircraft plates. Statement II : The magnesium ions are important for cell-membrane integrity. In the light the above statements, choose the correct answer from the options given below

(A)Both Statement I and Statement II are true
(B)Both Statement I and Statement II are false
(C)Statement I is true but Statement II is false
(D)Statement I is false but Statement II is true

Q43·ChemistrySingle correctJEE Main 2022

Which of the following statement is incorrect ?

(A)Low solubility of LiF in water is due to its small hydration enthalpy.
(B)KO $_2$ is paramagnetic.
(C)Solution of sodium in liquid ammonia is conducting in nature.
(D)Sodium metal has higher density than potassium metal

Q44·ChemistrySingle correctJEE Main 2022

Given below are two statements: Statement I : The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases. Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions. In the light of the above statements. Choose the correct answer from the options given below.

(A)Both statement I and Statement II are true
(B)Both statement I and Statement II are false
(C)Statement I is true but Statement II is false
(D)Statement I is false but Statement II is true

Q45·ChemistrySingle correctJEE Main 2022

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is:

(A)Mg
(B)Be
(C)Ca
(D)Sr

Q46·ChemistrySingle correctJEE Main 2022

Reaction of BeCl

_2

with LiAlH

_4

gives : (A) AlCl

_3

(B) BeH

_2

(C) LiH (D) LiCl (E) BeAlH

_4

Choose the correct answer from options given below :

(A)(A), (D) and (E)
(B)(A) , (B) and (D)
(C)(D) and (E)
(D)(B) , (C) and (D)

Q47·ChemistrySingle correctJEE Main 2022

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : LiF is sparingly soluble in water. Reason R : The ionic radius of

Li^{+}

ion is smallest among its group members, hence has least hydration enthalpy. In the light of the above statements, choose the most appropriate answer from the options given below .

(A)Both A and R are true and R is the correct explanation of A
(B)Both A and R are true but R is NOT the correct explanation of A
(C)A is true but R is false
(D)A is false but R is true

Q48·ChemistrySingle correctJEE Main 2022

Choose the correct order of density of the alkali metals :

(A)Li < K < Na < Rb < Cs
(B)Li < Na < K < Rb < Cs
(C)Cs < Rb < K < Na < Li
(D)Li < Na < K < Cs < Rb

Q49·ChemistrySingle correctJEE Main 2022

Match the List-I with List- II. Choose the most appropriate answer from the options given below:

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

(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)

Q50·ChemistrySingle correctJEE Main 2022

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.

Q51·ChemistrySingle correctJEE Main 2022

BeCl_{2}

reacts with

LiAlH_{4}

to give

(A)Be + $Li[AlCl_{4}]$ + $H_{2}$
(B)Be + $AlH_{3}$ + LiCl + HCl
(C) $BeH_{2}$ + LiCl + $AlCl_{3}$
(D) $BeH_{2}$ + $Li[AlCl_{4}]$

Q52·ChemistryNumericalJEE Main 2022

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________

Q53·ChemistrySingle correctJEE Main 2022

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

(A)Li
(B)Na
(C)Rb
(D)Be

Q54·ChemistrySingle correctJEE Main 2022

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

Q55·ChemistrySingle correctJEE Main 2022

Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to

(A) $CaCO_3$ and $Mg(OH)_2$
(B) $CaCO_3$ and $M_2CO_3$
(C) $Ca(OH)_2$ and $MgCO_3$
(D) $Ca(OH)_2$ and $Mg(OH)_2$

Q56·ChemistrySingle correctJEE Main 2022

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

(A) $Be^{2+}$
(B) $Mg^{2+}$
(C) $Ca^{2+}$
(D) $Sr^{2+}$

Q57·ChemistrySingle correctJEE Main 2022

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

Q58·ChemistrySingle correctJEE Main 2021

The major component/ingredient of Portland Cement is :

(A)tricalcium aluminate
(B)tricalcium silicate
(C)dicalcium aluminate
(D)dicalcium silicate

Q59·ChemistrySingle correctJEE Main 2021

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

Q60·ChemistrySingle correctJEE Main 2021

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.

Q61·ChemistrySingle correctJEE Main 2021

What are the products formed in sequence when excess of

\mathrm{CO_2}

is passed in slaked lime?

(A) $\mathrm{Ca(HCO_3)_2}$ , $\mathrm{CaCO_3}$
(B) $\mathrm{CaCO_3}$ , $\mathrm{Ca(HCO_3)_2}$
(C) $\mathrm{CaO}$ , $\mathrm{Ca(HCO_3)_2}$
(D) $\mathrm{CaO}$ , $\mathrm{CaCO_3}$

Q62·ChemistrySingle correctJEE Main 2021

Match List − I with List − II: List − I (a) Li (b) Na (c) K (d) Cs List − II (i) photoelectric cell (ii) absorbent of CO

_2

(iii) coolant in fast breeder nuclear reactor (iv) treatment of cancer (v) bearings for motor engines Choose the correct answer from the options given below:

(A)(a) − (v), (b) −(ii), (c) −(iv), (d) −(i)
(B)(a) −(iv), (b) − (iii), (c) −(i), (d) − (ii)
(C)(a) − (v), (b) − (i) , (c)- (ii), (d) − (iv)
(D)(a) −(v), (b) − (iii) , (c) − (ii), (d) −(i)

Q63·ChemistrySingle correctJEE Main 2021

Match List- I with List-II: List – I: (a) NaOH; (b)

Be(OH)_2

; (c)

Ca(OH)_2

; (d)

B(OH)_3

; (e)

Al(OH)_3

List – II: (i) Acidic; (ii) Basic; (iii) Amphoteric Choose the most appropriate answer from the options given below:

(A)(a) – (ii), (b) – (i), (c) – (ii), (d) – (iii), (e) – (iii)
(B)(a) – (ii), (b) – (iii), (c) – (ii), (d) – (i), (e) – (iii)
(C)(a) – (ii), (b) – (ii), (c) – (iii), (d) – (ii), (e) – (iii)
(D)(a) – (ii), (b) – (ii), (c) – (iii), (d) – (i), (e) – (iii)

Q64·ChemistrySingle correctJEE Main 2021

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion R: Lithium halides are some what covalent is nature. Reason R: Lithium possess 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)Both A and R are true but R is NOT the correct explanation of A
(C)A is false but R is true
(D)Both A and R are true and R is the correct explanation of A

Q65·ChemistrySingle correctJEE Main 2021

Match List – I with List – II: List – I Elements (a) Li (b) Na (c) K (d) Cs List – II Properties (i) Poor water solubility of

I^-

salt (ii) Most abundant element in cell fluid (iii) Bicarbonate salt used in fire extinguisher (iv) Carbonate salt decomposes easily on heating Choose the correct answer from the options given below:

(A)(a) – (iv), (b) – (ii), (c) – (iii), (d) – (i)
(B)(a) – (i), (b) –(ii), (c) – (iii), (d) – (iv)
(C)(a) –(i), (b) – (iii), (c) – (ii), (d) – (iv)
(D)(a) – (iv), (b) –(iii), (c) –(ii), (d) –(i)

Q66·ChemistrySingle correctJEE Main 2021

Given below are two statements: Statement I: None of the alkaline earth metal hydroxides dissolves 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 and Statement II both are incorrect.
(B)Statement I is incorrect but Statement II is correct.
(C)Statement I is correct but Statement II is incorrect.
(D)Statement I and Statement II both are correct.

Q67·ChemistrySingle correctJEE Main 2021

Match List − I with List − II : Choose the correct answer from the options given below :

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

(A)(a) − (ii), (b) − (iii), (c) − (i) and (d) − (iv)
(B)(a) − (iv), (b) − (i), (c) − (ii) and (d) − (iii)
(C)(a) − (i), (b) − (iv), (iii) − (ii) and (d) − (iii)
(D)(a) − (iii), (b) − (ii), (c) − (iv) and (d) − (i)

Q68·ChemistrySingle correctJEE Main 2021

A s-block element (M) reacts with oxygen to form an oxide of the formula

MO_2

. The oxide is pale yellow in colour and paramagnetic. The element (M) is:

(A)Na
(B)K
(C)Mg
(D)Ca

Q69·ChemistrySingle correctJEE Main 2021

Match List-I with List-II Choose the most appropriate answer from the options given below :

List-I	List-II
a.Ca(OCl) $_{2}$	i.Antacid
b.CaSO $_{4}$ . $\frac{1}{2}$ H $_{2}$ O	ii.Cement
c.CaO	iii.Bleach
d.CaCO $_{3}$	iv.Plaster of paris

(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

Q70·ChemistrySingle correctJEE Main 2021

One of the by-products formed during the recovery of NH

_{3}

from Solvay process is :

(A)Ca(OH) $_{2}$
(B)NaHCO $_{3}$
(C)CaCl $_{2}$
(D)NH $_{4}$ Cl

Q71·ChemistrySingle correctJEE Main 2021

The correct order of conductivity of ions in water is :

(A) $\mathrm{Na^+ > K^+ > Rb^+ > Cs^+}$
(B) $\mathrm{Cs^+ > Rb^+ > K^+ > Na^+}$
(C) $\mathrm{K^+ > Na^+ > Cs^+ > Rb^+}$
(D) $\mathrm{Rb^+ > Na^+ > K^+ > Li^+}$

Q72·ChemistrySingle correctJEE Main 2021

Given below are two statements : Statement I : Both CaCl

_{2}

.6H

_{2}

O and MgCl

_{2}

.8H

_{2}

O 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)Statement I is false but statement II is true
(B)Both statement I and statement II are false
(C)Both statement I and statement II are true
(D)Statement I is true but statement II is false

Q73·ChemistrySingle correctJEE Main 2021

Match List-I with List-II. List-I (a) Sodium Carbonate (b) Titanium (c) Chlorine (d) Sodium hydroxide List-II (i) Deacon (ii) Caster-Kellner (iii) Van-Arkel (iv) Solvay Choose the correct answer from the option given below:

(A)(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
(B)(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
(C)(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(D)(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

Q74·ChemistrySingle correctJEE Main 2021

Find A, B and C in the following reaction : NH

_3

+ A + CO

_2

→ (NH

_4

)

_2

CO

_3

(NH

_4

)

_2

CO

_3

+ H

_2

O + B → NH

_4

HCO

_3

NH

_4

HCO

_3

+ NaCl → NH

_4

Cl + C

(A)A – H $_2$ O ; B – CO $_2$ ; C – NaHCO $_3$
(B)A – H $_2$ O ; B – O $_2$ ; C – Na $_2$ CO $_3$
(C)A – O $_2$ ; B – CO $_2$ ; C – Na $_2$ CO $_3$
(D)A – H $_2$ O ; B – O $_2$ ; C – NaHCO $_3$

Q75·ChemistryNumericalJEE Main 2021

Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is _____(Integer answer). (A) Li (B) Na (C) Rb (D) Cs

Q76·ChemistrySingle correctJEE Main 2021

Match List-I with List-II List- I List-II (Salt) (Flame colour wavelength) (a) LiCl (i) 455.5 nm (b) NaCl (ii) 970.8 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)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
(C)(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
(D)(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)

Q77·ChemistryNumericalJEE Main 2021

Number of amphoteric compounds among the following is __________. (A) BeO (B) BaO (C)

\mathrm{Be(OH)_2}

(D)

\mathrm{Sr(OH)_2}

Q78·ChemistrySingle correctJEE Advanced 2020

Which of the following liberates

O_2

upon hydrolysis?

(A) $Pb_3O_4$
(B) $KO_2$
(C) $Na_2O_2$
(D) $Li_2O_2$

Q79·ChemistrySingle correctJEE Main 2020

Match the following compounds (Column-I) with their uses (Column-II):

Column-I	Column-II
i.Ca(OH) $_2$	A.casts of statues
ii.NaCl	B.white wash
iii.CaSO $_4$ · $\frac{1}{2}$ H $_2$ O	C.antacid
iv.CaCO $_3$	D.Washing soda preparation

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

Q80·ChemistrySingle correctJEE Main 2020

Among the sulphates of alkaline earth metals, the solubilities of

BeSO_4

and

MgSO_4

in water, respectively, are:

(A)poor and poor
(B)high and poor
(C)high and high
(D)poor and high

Q81·ChemistrySingle correctJEE Main 2020

The one that is NOT suitable for the removal of permanent hardness of water is:

(A)Calgon's method
(B)Clark's method
(C)Treatment with sodium carbonate
(D)Ion-exchange method

Q82·ChemistrySingle correctJEE Main 2020

On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are:

(A)Li $_2$ O, Na $_2$ O $_2$ and K $_2$ O
(B)Li $_2$ O, Na $_2$ O $_2$ and KO $_2$
(C)Li $_2$ O, Na $_2$ O and K $_2$ O $_2$
(D)Li $_2$ O, Na $_2$ O $_2$ and K $_2$ O $_2$

Q83·ChemistrySingle correctJEE Main 2020

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)Sr
(B)Be
(C)Mg
(D)Ca

Q84·ChemistrySingle correctJEE Main 2020

Among the statements (I – IV), the correct ones are: (I) Be has smaller atomic radius compared to Mg. (II) Be has higher ionization enthalpy than Al. (III) Charge/radius ratio of Be is greater than that of Al. (IV) Both Be and Al form mainly covalent compounds.

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

Q85·ChemistrySingle correctJEE Main 2020

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 H

_2

O

(A)(a), (b) and (d) only
(B)(a) and (d) only
(C)(b) and (c) only
(D)(a), (c) and (d) only

Q86·ChemistrySingle correctJEE Main 2020

A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H

_2

O gives a colourless gas which when passed through CuSO

_4

solution gives a dark blue-violet coloured solution. A and B respectively, are:

(A)Mg and Mg(NO $_3$ ) $_2$
(B)Na and NaNO $_3$
(C)Mg and Mg $_3$ N $_2$
(D)Na and Na $_3$ N

Q87·ChemistrySingle correctJEE Main 2020

When gypsum is heated to 393 K, it forms :

(A)CaSO $_{4}$ . 0.5H $_{2}$ O
(B)Dead burnt plaster
(C)Anhydrous CaSO $_{4}$
(D)CaSO $_{4}$ . 5 H $_{2}$ O

Q88·ChemistrySingle correctJEE Main 2019

The INCORRECT statement is:

(A)LiNO $_3$ decomposes on heating to give LiNO $_2$ and O $_2$ .
(B)Lithium is least reactive with water among the alkali metals.
(C)LiCl crystallises from aqueous solution as LiCl.2H $_2$ O.
(D)Lithium is the strongest reducing agent among the alkali metals.

Q89·ChemistrySingle correctJEE Main 2019

The correct sequence of thermal stability of the following carbonates is :

(A) $BaCO_3 < SrCO_3 < CaCO_3 < MgCO_3$
(B) $BaCO_3 < CaCO_3 < SrCO_3 < MgCO_3$
(C) $MgCO_3 < CaCO_3 < SrCO_3 < BaCO_3$
(D) $MgCO_3 < SrCO_3 < CaCO_3 < BaCO_3$

Q90·ChemistrySingle correctJEE Main 2019

A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373K leads to an anhydrous white powder Z. X and Z, respectively, are:

(A)Washing soda and soda ash.
(B)Washing soda and dead burnt plaster.
(C)Baking soda and dead burnt plaster.
(D)Baking soda and soda ash.

Q91·ChemistrySingle correctJEE Main 2019

The alloy used in the construction of aircrafts is

(A)Mg–Mn
(B)Mg-Zn
(C)Mg-Al
(D)Mg-Sn

Q92·ChemistrySingle correctJEE Main 2019

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

(A)chain and dimeric
(B)chain and chain
(C)dimeric and dimeric
(D)dimeric and chain

Q93·ChemistrySingle correctJEE Main 2019

Magnesium powder burns in air to give:

(A) $MgO$ and $Mg(NO_3)_2$
(B) $MgO$ and $Mg_3N_2$
(C) $MgO$ only
(D) $Mg(NO_3)_2$ and $Mg_3N_2$

Q94·ChemistrySingle correctJEE Main 2019

The covalent alkaline earth metal halide

(X=Cl,Br,I)

is:

(A) $BeX_{2}$
(B) $CaX_{2}$
(C) $SrX_{2}$
(D) $MgX_{2}$

Q95·ChemistrySingle correctJEE Main 2019

The correct order of hydration enthalpies of alkali metal ions is:

(A) $Li^+ > Na^+ > K^+ > Cs^+ > Rb^+$
(B) $Na^+ > Li^+ > K^+ > Rb^+ > Cs^+$
(C) $Na^+ > Li^+ > K^+ > Cs^+ > Rb^+$
(D) $Li^+ > Na^+ > K^+ > Rb^+ > Cs^+$

Q96·ChemistrySingle correctJEE Main 2019

The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are : I. They activate many enzymes II. They participate in the oxidation of glucose to produce ATP III. Along with sodium ions, they are responsible for the transmission of nerve signals

(A)I and II only
(B)I and III only
(C)I, II and III
(D)III only

Q97·ChemistrySingle correctJEE Main 2019

A metal on combustion in excess air forms X, X upon hydrolysis with water yields

H_2O_2

and

O_2

along with another product. The metal is:

(A)Na
(B)Rb
(C)Mg
(D)Li

Q98·ChemistrySingle correctJEE Main 2019

The amphoteric hydroxide is:

(A) $Be(OH)_2$
(B) $Ca(OH)_2$
(C) $Mg(OH)_2$
(D) $Sr(OH)_2$

Q99·ChemistrySingle correctJEE Main 2019

Match the following items in column I with the corresponding items in column II.

Column I	Column II
I.Na $_2$ CO $_3$ . 10 H $_2$ O	A.Portland cement ingredient
II.Mg (HCO $_3$ ) $_2$	B.Castner \u2013 Kellner process
III.NaOH	C.Solvay process
IV.Ca $_3$ Al $_2$ O $_6$	D.Temporary hardness

(A)I \u2013 B, II \u2013 C, III \u2013 A, IV \u2013 D
(B)I \u2013 C, II \u2013 B, III \u2013 D, IV \u2013 A
(C)I \u2013 D, II \u2013 A, III \u2013 B, IV \u2013 C
(D)I \u2013 C, II \u2013 D, III \u2013 B, IV \u2013 A

Q100·ChemistrySingle correctJEE Main 2019

The metal used for making X-ray tube window is

(A)Mg
(B)Na
(C)Be
(D)Ca

Q101·ChemistrySingle correctJEE Main 2019

The alkaline earth metal nitrate that does not crystallise with water molecules is

(A)Mg(NO $_{3}$ ) $_{2}$
(B)Sr(NO $_{3}$ ) $_{2}$
(C)Ca(NO $_{3}$ ) $_{2}$
(D)Ba(NO $_{3}$ ) $_{2}$

Q102·ChemistrySingle correctJEE Main 2019

The metal that forms nitride by reacting directly with N

_2

of air is

(A)K
(B)Li
(C)Rb
(D)Cs

Q103·ChemistryMultiple correctJEE Advanced 2014

The pair(s) of reagents that yield paramagnetic species is/are

(A) $Na$ and excess of $NH_3$
(B) $K$ and excess of $O_2$
(C) $Cu$ and dilute $HNO_3$
(D) $O_2$ and 2-ethylanthraquinol

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