Back to S-BLOCK ELEMENTS

Your Progress

0 / 137 Answered

Correct

Incorrect

Accuracy

JEE • CHEMISTRY • S-BLOCK ELEMENTS

S-block elements practice · Easy

Try a question, then open “View answer” to check it. Sign in to submit answers and save progress.

Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

Take a chapter quiz →

Showing 1-30 of 137 questions

1 Easy

1 of 137

Understanding +4 | -1

In the Down’s cell

\mathrm{KCl}

is added in

\mathrm{NaCl}

to:

View answer and explanation

Correct option: A

Lower its m.p

Option A (Lower its m.p) is correct because adding KCl to NaCl in Down's cell lowers the melting point of the mixture, making electrolysis more energy-efficient.

2 Easy

2 of 137

Remembering +4 | -1

Fusion mixture is comprised of:

View answer and explanation

Correct option: A

{\mathrm{K}_2}\mathrm{C}{\mathrm{O}_3} + \mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

Option A (

{\mathrm{K}_2}\mathrm{C}{\mathrm{O}_3} + \mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

) is correct because the fusion mixture is a combination of potassium carbonate and sodium carbonate.

3 Easy

3 of 137

Remembering +4 | -1

The bleaching action of bleaching powder is due to the formation of:

View answer and explanation

Correct option: C

\mathrm{HClO}

Option C (

\mathrm{HClO}

) is correct because the bleaching action of bleaching powder is due to the formation of hypochlorous acid (

\mathrm{HClO}

), which releases nascent oxygen.

4 Easy

4 of 137

Understanding +4 | -1

Assertion (A):

\mathrm{Li}

and

\mathrm{Mg}

shows diagonal relationship.

Reason (R) :

\mathrm{Li}

and

\mathrm{Mg}

are diagonal to each other in the Periodic Table.

View answer and explanation

Correct option: B

Both

\mathbf{A}

and

\mathbf{R}

are true but

\mathbf{R}

is not the correct explanation of

\mathbf{A}

Option B (Both

\mathbf{A}

and

\mathbf{R}

are true but

\mathbf{R}

is not the correct explanation of

\mathbf{A}

) is correct because while both the assertion and reason are true, the reason (diagonal placement) doesn't explain the diagonal relationship. The diagonal relationship arises due to similar polarizing power.

5 Easy

5 of 137

Remembering +4 | -1

The pair whose both species are used in ant- acid medicinal preparations is:

View answer and explanation

Correct option: A

NaHCO_3

and

Mg(OH)_2

Option A (

NaHCO_3

and

Mg(OH)_2

) is correct because both sodium bicarbonate and magnesium hydroxide are commonly used as antacids to neutralize stomach acid.

6 Easy

6 of 137

Analyzing +4 | -1

Which of the alkali metal chloride is expected to have highest m.p.?

View answer and explanation

Correct option: A

\mathrm{LiCl}

Option A (

\mathrm{LiCl}

) is correct because, among the given alkali metal chlorides, LiCl has the smallest cation, resulting in the highest lattice energy and thus the highest melting point.

7 Easy

7 of 137

Understanding +4 | -1

Alkaline earth metal compounds are les soluble in water than corresponding alkali metal compounds because former have:

View answer and explanation

Correct option: C

Higher covalent character

Option C (Higher covalent character) is correct because alkaline earth metal compounds have a higher covalent character than corresponding alkali metal compounds, leading to lower solubility.

8 Easy

8 of 137

Remembering +4 | -1

Mg burns with a brilliant flame. This property is used in:

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because magnesium's bright flame when burned makes it useful in fireworks, military signals, and photographic flash bulbs.

9 Easy

9 of 137

Remembering +4 | -1

The difference of water molecules in gypsum and plaster of Paris is

View answer and explanation

Correct option: D

1\frac{1}{2}

Option D (

1\frac{1}{2}

) is correct because the difference in water molecules between gypsum and plaster of Paris is calculated by subtracting the number of water molecules in plaster of Paris from that in gypsum.

10 Easy

10 of 137

Understanding +4 | -1

Which of the following metal carbonate is decomposed on heating

View answer and explanation

Correct option: A

MgC{O_3}

Option A (

MgC{O_3}

) is correct because magnesium carbonate decomposes upon heating to form magnesium oxide and carbon dioxide.

11 Easy

11 of 137

Remembering +4 | -1

The starting material used in Solvay’s process are

View answer and explanation

Correct option: B

Brine solution

Option B (Brine solution) is correct because brine solution (28% NaCl) is the starting material used in Solvay's process to produce sodium carbonate.

12 Easy

12 of 137

Understanding +4 | -1

Identify the correct statement:

View answer and explanation

Correct option: C

Gypsum contains a lower percentage of calcium than Plaster of Paris

Option D (Gypsum is obtained by heating Plaster of Paris) is correct because gypsum is formed by the hydration of Plaster of Paris.

13 Easy

13 of 137

Remembering +4 | -1

Potassium is kept in

View answer and explanation

Correct option: B

Kerosene

Option B (Kerosene) is correct because potassium is a highly reactive alkali metal that reacts vigorously with water, alcohol, and ammonia, so it's stored in kerosene to prevent these reactions.

14 Easy

14 of 137

Understanding +4 | -1

Assertion (A) : The mobility of sodium ion is lower than that of potassium ion.

Reason (R): The ionic mobilities depend on the effective radius of the ion.

View answer and explanation

Correct option: A

Both

\mathbf{A}

and

\mathbf{R}

are true and

\mathbf{R}

is the correct explanation of

\mathbf{A}

Option A (Both A and R are true and R is the correct explanation of A) is correct because smaller hydrated size of K+ compared to Na+ leads to higher mobility.

15 Easy

15 of 137

Remembering +4 | -1

Which element of IA group is most abundantly found in combined state?

View answer and explanation

Correct option: B

Option B (Cast iron) is correct because cast iron contains the highest percentage of carbon (2-5%) compared to the other options.

Explore Other Chapters in CHEMISTRY

View All →

P-BLOCK ELEMENTS 736 MCQs Equilibrium 696 MCQs STRUCTURE OF ATOM 634 MCQs THERMODYNAMICS 536 MCQs CHEMICAL BONDING & MOLECULAR STRUCTURE 514 MCQs SOLUTIONS 480 MCQs

16 Easy

16 of 137

Understanding +4 | -1

The activity of alkaline earth metals as reducing agents

View answer and explanation

Correct option: B

Increases from Be to Ba

Option B (Increases from Be to Ba) is correct because the reducing power of alkaline earth metals increases down the group due to decreasing ionization enthalpy.

17 Easy

17 of 137

Remembering +4 | -1

Molecular formula of Glauber’s salt is

View answer and explanation

Correct option: C

N{a_2}S{O_4}.10\,{H_2}O

Option C (

Na_2SO_4.10H_2O

) is correct because Glauber's salt is the common name for sodium sulfate decahydrate.

18 Easy

18 of 137

Remembering +4 | -1

Which alkaline earth metal forms peroxide on burning in air?

View answer and explanation

Correct option: D

\mathrm{Ba}

Option D (

\mathrm{Ba}

) is correct because barium, when burned in air, forms barium peroxide (

\mathrm{Ba}{\mathrm{O}_2}

19 Easy

19 of 137

Remembering +4 | -1

Sodium bicarbonate is manufactured by:

View answer and explanation

Correct option: D

Solvay process

Option D (Solvay process) is correct because the Solvay process is the industrial process used for the production of sodium carbonate, with sodium bicarbonate as an intermediate product.

20 Easy

20 of 137

Remembering +4 | -1

Mortar is mixture of

View answer and explanation

Correct option: A

Ca{\left( {OH} \right)_2}

silica and water

Option A (

Ca(OH)_2

silica and water) is correct because mortar is a mixture of calcium hydroxide, silica, and water, which hardens over time due to chemical reactions.

21 Easy

21 of 137

Understanding +4 | -1

B\xleftarrow[\Delta ]{{478\,\,K}}\,\,CaS{O_4}\,.\,\,2{H_2}O\xrightarrow[\Delta ]{{390\,\,K}}A

A and B are respectively

View answer and explanation

Correct option: A

Plaster of paris, dead burnt plaster

Option A is correct because CaSO4.2H2O heated at 390K gives Plaster of Paris (A), and further heating at 478K gives dead burnt plaster (B).

22 Easy

22 of 137

Analyzing +4 | -1

Which of the following properties of lithium does not show diagonal relationship with magnesium?

View answer and explanation

Correct option: A

Formation of

\mathrm{L}{\mathrm{i}^ + }

ion

The correct answer is A (Formation of

\mathrm{L}{\mathrm{i}^ + }

ion) because the formation of M+ ion is a general property of alkali metals and not specific to the diagonal relationship between Lithium and Magnesium.

23 Easy

23 of 137

Understanding +4 | -1

Magnesium has polarising power closer to that of:

View answer and explanation

Correct option: A

\mathrm{Li}

Option A (Li) is correct because Lithium and Magnesium exhibit a diagonal relationship, resulting in similar polarizing power.

24 Easy

24 of 137

Remembering +4 | -1

Solvay process is used for the manufacture of

View answer and explanation

Correct option: B

\mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

Option B (

\mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

) is correct because the Solvay process is specifically used for the industrial production of sodium carbonate (

\mathrm{N}{\mathrm{a}_2}\mathrm{C}{\mathrm{O}_3}

25 Easy

25 of 137

Remembering +4 | -1

Which of the following compound is superoxide :-

View answer and explanation

Correct option: A

\mathrm{KO}_2

Option A (

\mathrm{KO}_2

) is correct because potassium superoxide contains the superoxide ion (

\mathrm{O}_2^{\Theta}

26 Easy

26 of 137

Remembering +4 | -1

The dark red colour of bombs in fireworks is due to the presence of

View answer and explanation

Correct option: B

\mathrm{Sr}

Option B (

\mathrm{Sr}

) is correct because strontium compounds are used to produce a dark red color in fireworks.

27 Easy

27 of 137

Understanding +4 | -1

When a crystal of caustic soda is exposed to air, a liquid layer is deposited because:

View answer and explanation

Correct option: C

Crystal absorbs moisture and

\mathrm{C}{\mathrm{O}_2}

Option C is correct because caustic soda (NaOH) is hygroscopic and absorbs moisture from the air, and it also reacts with carbon dioxide to form sodium carbonate, which dissolves in the absorbed water, creating a liquid layer.

28 Easy

28 of 137

Remembering +4 | -1

Which of the following hydroxides is insoluble in water?

View answer and explanation

Correct option: C

\mathrm{Be}{\left( {\mathrm{OH}} \right)_2}

Option C (

\mathrm{Be}{\left( {\mathrm{OH}} \right)_2}

) is correct because beryllium hydroxide is amphoteric and practically insoluble in water, unlike the other alkaline earth metal hydroxides which have increasing solubility down the group.

29 Easy

29 of 137

Remembering +4 | -1

The most abundant cation among cell fluid is

View answer and explanation

Correct option: B

{K}^{+}

Option B (

{K}^{+}

) is correct because potassium ions are the most abundant cations within cell fluids, playing a crucial role in maintaining cell function.

30 Easy

30 of 137

Understanding +4 | -1

When

{\mathrm{K}_2}\mathrm{O}

is added to water, the solution is basic because it contains a significant concentration of:

View answer and explanation

Correct option: C

\mathrm{O}{\mathrm{H}^ - }

Option C (

\mathrm{O}{\mathrm{H}^ - }

) is correct because when K2O reacts with water, it forms KOH, which dissociates to produce hydroxide ions (OH-), making the solution basic.

Revision notes and key takeaways

Review S-BLOCK ELEMENTS in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 137 single-correct-answer MCQs on S-BLOCK ELEMENTS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

Showing 1-30 of 137 questions

Continue Your Practice

📚 Switch Set (EASY)

Chapter Sets

ALL 303 MCQs EASY 137 MCQs HARD 15 MCQs MEDIUM 151 MCQs

0 /137

0✓ 0✗

0% Accuracy