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JEE-MAIN SERIES
Chemistry

The S Block Elements

15 previous year questions.

Volume: 15 Ques
Yield: Medium

High-Yield Trend

2
2023
10
2022
3
2021

Chapter Questions
15 MCQs

01
PYQ 2021
medium
chemistry ID: jee-main
Choose the correct statement from the following:
1
Among the alkali metal halides, LiF is least soluble in water.
2
LiF has least negative standard enthalpy of formation among alkali metal fluorides.
3
The low solubility of CsI in water is due to its high lattice enthalpy.
4
The standard enthalpy of formation for alkali metal bromides becomes less negative on descending the group.
02
PYQ 2021
medium
chemistry ID: jee-main
Assertion A : During the boiling of water having temporary hardness, Mg(HCO₃)₂ is converted to MgCO₃.
Reason R : The solubility product of Mg(OH)₂ is greater than that of MgCO₃.
1
Both A and R are true and R is the correct explanation of A
2
Both A and R are true but R is NOT the correct explanation of A
3
A is true but R is false
4
A is false but R is true
03
PYQ 2021
medium
chemistry ID: jee-main

Match List - I with List - II :

Choose the correct answer from the options given below :

1
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
2
(a) - (v), (b) - (i), (c) - (ii), (d) - (iv)
3
(a) - (v), (b) - (ii), (c) - (iv), (d) - (i)
4
(a) - (v), (b) - (iii), (c) - (ii), (d) - (i)
04
PYQ 2022
medium
chemistry ID: jee-main
Aqueous solution of which of the following boron compounds will be strongly basic in nature?
1
NaBH4
2
LiBH4
3
B2H6
4
Na2B4O7
05
PYQ 2022
medium
chemistry ID: jee-main
s-block element which cannot be qualitatively confirmed by the flame test is
1
Li
2
Na
3
Rb
4
Be
06
PYQ 2022
easy
chemistry ID: jee-main
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 of the above statements, choose the correct answer from the options given below:
1
Both Statement-I and Statement-II are true
2
Both Statement-I and Statement-II are false
3
Statement-I is true but Statement-II is false
4
Statement-I is false but Statement-II is true
07
PYQ 2022
medium
chemistry ID: jee-main
Amongst baking soda, caustic soda and washing soda, carbonate anion is present in
1
Washing soda only
2
Washing soda and caustic soda only
3
Washing soda and baking soda only
4
Baking soda, caustic soda and washing soda
08
PYQ 2022
medium
chemistry ID: jee-main

The geometry around boron in the product ‘B’ formed from the following reaction is

1
Trigonal planar
2
Tetrahedral
3
Pyramidal
4
Square planar
09
PYQ 2022
medium
chemistry ID: jee-main

Match List-I with List-II:

List-I (Oxide)List-II (Nature)
(A) Cl2O7(I) Amphoteric
(B) Na2O(II) Basic
(C) Al2O3(III) Neutral
(D) N2O(IV) Acidic


Choose the correct answer from the options given below:

1
A-IV, B-III, C-I, D-II
2
A-IV, B-II, C-I, D-III
3
A-II, B-IV, C-III, D-I
4
A-I, B-II, C-III, D-IV
10
PYQ 2022
medium
chemistry ID: jee-main
Lithium nitrate and sodium nitrate, when heated separately, respectively, give :
1

LiNO2 and NaNO2

2

Li2O and Na2O

3

Li2O and NaNO2

4

LiNO2 and Na2O

11
PYQ 2022
medium
chemistry ID: jee-main
Among the following, basic oxide is:
1

SO3

2

SiO2

3
CaO
4

Al2O3

12
PYQ 2022
easy
chemistry ID: jee-main
Portland cement contains ‘X’ to enhance the setting time. What is ‘X’?
13
PYQ 2022
medium
chemistry ID: jee-main
The correct order of density is
1

Be > Mg > Ca > Sr

2

Sr > Ca > Mg > Be

3

Sr > Be > Mg > Ca

4

Be > Sr > Mg > Ca

14
PYQ 2023
medium
chemistry ID: jee-main
On heating, gives how many compounds among the following?
15
PYQ 2023
medium
chemistry ID: jee-main
Alkali metal from the following with least melting point is:
1
Rb
2
Na
3
K
4
Cs