${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3}.5{{\rm{H}}_2}{\rm{O}}$

${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3} \cdot 2{{\rm{H}}_2}{\rm{O}}$

${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3}.3{{\rm{H}}_2}{\rm{O}}$

${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3}.4{{\rm{H}}_2}{\rm{O}}$

Sodium carbonate reacts with ${\rm{S}}{{\rm{O}}_2}$ in aqueous solution to give:

${\rm{N}}{{\rm{a}}_2}{\rm{S}}{{\rm{O}}_3}$

Back to S-BLOCK ELEMENTS

Your Progress

0 / 303 Answered

Correct

Incorrect

Accuracy

JEE • CHEMISTRY • S-BLOCK ELEMENTS

S-block elements practice · Mixed difficulty

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 61-90 of 303 questions

61 Medium

61 of 303

Remembering +4 | -1

A fire work gave brick red colour. It probably contained a salt of

{C}

View answer and explanation

Correct option: A

{Ca}

Option A (

{Ca}

) is correct because Calcium salts impart a brick red color to the flame.

62 Easy

62 of 303

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.

63 Easy

63 of 303

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.

64 Medium

64 of 303

Remembering +4 | -1

In which of the following, sodium carbonate is not used?

View answer and explanation

Correct option: C

In tyre making

Option C (In tyre making) is correct because sodium carbonate is primarily used in soap making, paper making, and baking but not typically in the manufacturing of tires.

65 Medium

65 of 303

Understanding +4 | -1

Assertion (A): When

\mathrm{CO}_2

is continuously bubbled through lime water a precipitate is formed which later dissolves.
Reason (R): Calcium carbonate is initially, formed which reacts further with carbon dioxide to form calcium carbonate

View answer and explanation

Correct option: A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Option A is correct because both the assertion and reason are true, and the reason correctly explains why the precipitate initially formed dissolves upon continuous bubbling of CO2.

66 Easy

66 of 303

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.

67 Easy

67 of 303

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.

68 Easy

68 of 303

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.

69 Easy

69 of 303

Remembering +4 | -1

Hypo is chemically:

View answer and explanation

Correct option: D

\mathrm{N}{\mathrm{a}_2}{\mathrm{S}_2}{\mathrm{O}_3}.5{\mathrm{H}_2}\mathrm{O}

Option D (

\mathrm{N}{\mathrm{a}_2}{\mathrm{S}_2}{\mathrm{O}_3}.5{\mathrm{H}_2}\mathrm{O}

) is correct because it is the chemical formula for sodium thiosulfate pentahydrate, commonly known as hypo.

70 Medium

70 of 303

Remembering +4 | -1

Which out of the following compounds is called photographer’s fixer?

View answer and explanation

Correct option: B

\mathrm{N}{\mathrm{a}_2}{\mathrm{S}_2}{\mathrm{O}_3}.5{\mathrm{H}_2}\mathrm{O}

Option B (

\mathrm{N}{\mathrm{a}_2}{\mathrm{S}_2}{\mathrm{O}_3}.5{\mathrm{H}_2}\mathrm{O}

) is correct because sodium thiosulfate pentahydrate is used as a photographer's fixer to remove unexposed silver halide crystals.

71 Medium

71 of 303

Understanding +4 | -1

\mathrm{CO}_2

gas along with solid

(\mathrm{Y})

is obtained when sodium salt

(\mathrm{X})

is heated.

(\mathrm{X})

is again in obtained when

\mathrm{CO}_2

gas is passed into aqueous solution

\mathrm{(Y). (X)}

and

\mathrm{(Y)}

respectively, are

View answer and explanation

Correct option: C

\mathrm{NaHCO}_3, \mathrm{Na}_2 \mathrm{CO}_3

Option C (

\mathrm{NaHCO}_3, \mathrm{Na}_2 \mathrm{CO}_3

) is correct because heating sodium bicarbonate produces sodium carbonate, carbon dioxide, and water, and passing carbon dioxide through sodium carbonate solution regenerates sodium bicarbonate.

72 Medium

72 of 303

Understanding +4 | -1

Which of the following statements is false for alkali metals?

View answer and explanation

Correct option: B

Na

forms superoxide with oxygen

Option B is the false statement because Sodium (

Na

) primarily forms peroxide (

Na_2O_2

) with oxygen, not superoxide.

73 Medium

73 of 303

Understanding +4 | -1

Which of the following reaction does not take place:

View answer and explanation

Correct option: C

{Be}+{H}_2 {O} \underset{\text {(Steam)}}{\longrightarrow}

Option C is correct because Beryllium (Be) does not react with water, even steam, due to its high ionization enthalpy and small size.

74 Easy

74 of 303

Analyzing +4 | -1

Assertion : Order of lattice energy for same halides are as

\operatorname{LiX}>{NaX}>{KX}

.

Reason : Size of alkaline - earth metal increases from

{Li}

K

View answer and explanation

Correct option: C

If assertion is true but reason is false.

Option C is correct because the assertion is true (lattice energy order is LiX > NaX > KX), but the reason is false (Li, Na, and K are alkali metals, not alkaline earth metals).

75 Easy

75 of 303

Remembering +4 | -1

The alkali metal which acts as a nutrient for plants is:

View answer and explanation

Correct option: B

Option B (K) is correct because potassium is an essential macronutrient for plants, playing a vital role in various physiological processes.

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

76 Medium

76 of 303

Understanding +4 | -1

Which of the following compounds has the
highest hydration energy?

View answer and explanation

Correct option: A

\mathrm{BeSO}_4

Option A (

\mathrm{BeSO}_4

) is correct because

\mathrm{BeSO}_4

has the highest hydration energy due to the small size and high charge density of

\mathrm{Be}^{2+}

ion.

77 Hard

77 of 303

Analyzing +4 | -1

A metal

'M'

reacts with

{\mathrm{N}_2}

to give a compound

'A'\left( {{M_3}N} \right).\mathrm{ }'A'

on heating at high temperature gives back

'M'\mathrm{and '}A'

on reacting with

{\mathrm{H}_2}\mathrm{O}

gives a gas

B.\mathrm{ }'B'

turns

\mathrm{CuS}{\mathrm{O}_4}

solution blue on passing through it.

M\mathrm{and}B

can be

View answer and explanation

Correct option: B

\mathrm{Li and N}{\mathrm{H}_3}

Option B (Li and NH3) is correct because Lithium reacts with nitrogen to form lithium nitride, which reacts with water to produce ammonia, and ammonia turns CuSO4 solution blue.

78 Easy

78 of 303

Remembering +4 | -1

On heating washing soda, we get:

View answer and explanation

Correct option: D

{\mathrm{H}_2}\mathrm{O}\left( v \right)

Option D (

{\mathrm{H}_2}\mathrm{O}\left( v \right)

) is correct because heating washing soda leads to the loss of water molecules in the form of vapor.

79 Medium

79 of 303

Understanding +4 | -1

Statement-I : Exhausted permutit can be
regenerated by adding

10\% \,CaC{l_2}

.

Statement-II : Calgon forms soluble
complexes with cations which are causing
hardness to water.

View answer and explanation

Correct option: C

Statement I is incorrect but statement II
is correct

Option C is correct because exhausted permutit is regenerated by adding 10% NaCl, not CaCl2, and Calgon does form soluble complexes with cations causing hardness.

80 Medium

80 of 303

Understanding +4 | -1

Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth’s metal is

View answer and explanation

Correct option: B

Stronger

Option B (Stronger) is correct because alkaline earth metals have two valence electrons, leading to stronger metallic bonding and thus higher density compared to alkali metals.

81 Easy

81 of 303

Remembering +4 | -1

Which alkaline earth metal nitride is volatile?

View answer and explanation

Correct option: A

\mathrm{B}{\mathrm{e}_3}{\mathrm{N}_2}

Option A (Be3N2) is correct because Beryllium nitride (Be3N2) is known to be volatile, unlike other alkaline earth metal nitrides.

82 Medium

82 of 303

Understanding +4 | -1

Which one of the following ionic solids has the highest lattice energy?

View answer and explanation

Correct option: A

{Be}({OH})_2

Option A (

{Be}({OH})_2

) is correct because lattice energy is highest for smaller ions with higher charges, and Be2+ is the smallest cation.

83 Easy

83 of 303

Remembering +4 | -1

Oxone is name given to:

View answer and explanation

Correct option: B

Sodium peroxide

Option B is correct because Oxone is a trade name for a mixture containing sodium peroxide (Na2O2).

84 Hard

84 of 303

Analyzing +4 | -1

Which of the following acts as reducing agent as well as oxidising agent?

View answer and explanation

Correct option: B

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

Option B (Statement I, II are incorrect) is correct because NH4Cl is a salt of a weak base and strong acid, so its aqueous solution is acidic (pH < 7).

85 Easy

85 of 303

Remembering +4 | -1

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

View answer and explanation

Correct option: C

Ca

Option C (

Ca

) is correct because Calcium ions play a crucial role in neuromuscular function and interneuronal transmission.

86 Medium

86 of 303

Remembering +4 | -1

The byproduct of Solvay process is:

View answer and explanation

Correct option: B

\mathrm{CaC}{\mathrm{l}_2}

Option B (

\mathrm{CaC}{\mathrm{l}_2}

) is correct because calcium chloride (

\mathrm{CaC}{\mathrm{l}_2}

) is a byproduct of the Solvay process.

87 Medium

87 of 303

Remembering +4 | -1

The raw materials in Solvay process are:

View answer and explanation

Correct option: D

\mathrm{NaCl},\mathrm{N}{\mathrm{H}_3},\mathrm{CaC}{\mathrm{O}_3}

Option D (

\mathrm{NaCl},\mathrm{N}{\mathrm{H}_3},\mathrm{CaC}{\mathrm{O}_3}

) is correct because these are the primary raw materials used in the Solvay process for producing sodium carbonate.

88 Easy

88 of 303

Understanding +4 | -1

Which property of sodium is being used in street lights.

View answer and explanation

Correct option: C

Sodium atoms emits photons in yellow region of visible spectrum, due to electrically stimulated transitions.

Option C is correct because sodium atoms emit photons in the yellow region of the visible spectrum due to electrically stimulated transitions, which is why they are used in street lights.

89 Medium

89 of 303

Analyzing +4 | -1

A: Lime water turns milky when

{CO}_2

is passed into it. With excess

{CO}_2

, the milkiness disappears.

R: Group 2 metal carbonates are insoluble but bicarbonates are soluble.

View answer and explanation

Correct option: A

Both A and R are true and R is the correct explanation of A

Option A (Both A and R are true and R is the correct explanation of A) is correct because the initial formation of insoluble calcium carbonate causes milkiness, which disappears upon formation of soluble calcium bicarbonate with excess CO₂.

90 Medium

90 of 303

Understanding +4 | -1

Sodium carbonate reacts with

\mathrm{S}{\mathrm{O}_2}

in aqueous solution to give:

View answer and explanation

Correct option: C

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

Option C (

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

) is correct because sodium carbonate reacts with sulfur dioxide in aqueous solution to form sodium sulfite and carbon dioxide.

Revision notes and key takeaways

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

Showing 61-90 of 303 questions

Continue Your Practice

📚 Switch Set (ALL)

Chapter Sets

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

0 /303

0✓ 0✗

0% Accuracy