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JEE • CHEMISTRY • 14 TH GROUP ELEMENTS (P-BLOCK)

14 th group elements (p-block) practice · Easy

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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.

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Showing 1-30 of 85 questions

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1 Easy

1 of 85

Remembering +4 | -1

Commercially important ore of lead is:

View answer and explanation

Correct option: D

Galena

Option D (Galena) is correct because Galena (PbS) is the most commercially important ore of lead.

2 Easy

2 of 85

Remembering +4 | -1

In general, silicones:

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because silicones generally have high thermal stability, are resistant to oxidation, and are water repellent.

3 Easy

3 of 85

Remembering +4 | -1

Silicon is

View answer and explanation

Correct option: A

Semiconductor

Option A (Semiconductor) is correct because silicon (Si) is a material with electrical conductivity between that of a conductor and an insulator.

4 Easy

4 of 85

Analyzing +4 | -1

Assertion (A) : Diamond is insulator and graphite is conducting.

Reason (R): C-atom is

s p^3

hybridised in both.

View answer and explanation

Correct option: C

\mathbf{A}

is true but

\mathbf{R}

is false.

Option C is correct because the assertion is true, but the reason is false. Diamond is an insulator and graphite is conducting, but the hybridization is different.

5 Easy

5 of 85

Remembering +4 | -1

Moderate electrical conductivity is shown by

View answer and explanation

Correct option: B

Graphite

Option B (Graphite) is correct because graphite has a layered structure with delocalized electrons, allowing it to conduct electricity moderately.

6 Easy

6 of 85

Remembering +4 | -1

The hybridisation of carbon in diamond, graphite and fullerenes are respectively.

View answer and explanation

Correct option: A

S{p^3},S{P^2},S{P^2}

Option A (

S{p^3},S{P^2},S{P^2}

) is correct because carbon in diamond is

sp^3

hybridized, in graphite is

sp^2

hybridized, and in fullerenes is also

sp^2

hybridized.

7 Easy

7 of 85

Remembering +4 | -1

Which one of the following is used as an acid flux in metallurgy?

View answer and explanation

Correct option: B

\mathrm{Si}{\mathrm{O}_2}

Option B (

\mathrm{Si}{\mathrm{O}_2}

) is correct because silica (

\mathrm{Si}{\mathrm{O}_2}

) is an acidic oxide and is used as an acid flux to remove basic impurities in metallurgy.

8 Easy

8 of 85

Remembering +4 | -1

The hottest part of the Bunsen burner flame is:

View answer and explanation

Correct option: B

A little below the tip of the flame

Option B (A little below the tip of the flame) is correct because the hottest part of a Bunsen burner flame is located just below the tip of the inner blue cone, where complete combustion occurs.

9 Easy

9 of 85

Remembering +4 | -1

Which of the following isotope of carbon is radioactive?

View answer and explanation

Correct option: C

{ }^{14} {C}

Option C (

{ }^{14} {C}

) is correct because it is a radioactive isotope of carbon used for radiocarbon dating.

10 Easy

10 of 85

Remembering +4 | -1

The ability of a substance to assume two or more crystalline structures is called:

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Correct option: C

Polymorphism

Option C (Polymorphism) is correct because polymorphism refers to the ability of a substance to exist in two or more different crystalline forms.

11 Easy

11 of 85

Understanding +4 | -1

The percentage of s-character of the hybrid orbitals of carbon in graphite and diamond are respectively

View answer and explanation

Correct option: A

33, 25

Option A (33, 25) is correct because in graphite, carbon is

sp^2

hybridized (33% s-character), and in diamond, carbon is

sp^3

hybridized (25% s-character).

12 Easy

12 of 85

Understanding +4 | -1

Which of the following has lowest ionization enthalpy?

View answer and explanation

Correct option: C

{Sn}

Option C (

{Sn}

) is correct because ionization enthalpy generally decreases down a group, and while Pb has a slightly higher value than expected due to the poor shielding effect, Sn still has the lowest.

13 Easy

13 of 85

Remembering +4 | -1

Which variety of glass is used for manufacture of optical glasses

View answer and explanation

Correct option: B

Flint glass

Option B (Flint glass) is correct because flint glass is specifically used in the manufacture of optical lenses due to its high refractive index and low dispersion.

14 Easy

14 of 85

Remembering +4 | -1

Which statement is false?

View answer and explanation

Correct option: C

Water gas is a mixture of water vapour and hydrogen

Option C (Water gas is a mixture of water vapour and hydrogen) is false because water gas is a mixture of carbon monoxide and hydrogen.

15 Easy

15 of 85

Remembering +4 | -1

Tin, a silvery white metal exists in:

View answer and explanation

Correct option: B

Three allotropic forms

Option B (Three allotropic forms) is correct because tin exists in three allotropic forms: grey tin, white tin, and rhombic tin.

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16 Easy

16 of 85

Remembering +4 | -1

The approximate percentage of silica in cement is :

View answer and explanation

Correct option: C

20-25 \%

Option C (

20-25 \%

) is correct because the approximate percentage of silica in cement is in the range of 20-25%.

17 Easy

17 of 85

Understanding +4 | -1

Silica dissolves in excess of

HF

due to formation of:

View answer and explanation

Correct option: C

{H_2}Si{F_6}

Option C is correct because silica reacts with HF to form hexafluorosilicic acid (

{H_2}Si{F_6}

), which is soluble.

18 Easy

18 of 85

Remembering +4 | -1

In the preparation of amorphous silicon, HF acid is used to remove

View answer and explanation

Correct option: B

\mathrm{Si}{\mathrm{O}_2}

Option B (

\mathrm{SiO_2}

) is correct because hydrofluoric acid (HF) is used to remove silicon dioxide (

\mathrm{SiO_2}

) in the preparation of amorphous silicon.

19 Easy

19 of 85

Remembering +4 | -1

What structural characteristics are associated with graphite?

View answer and explanation

Correct option: D

All of these

Option D ( All of these) is correct because graphite has a 2-D sheet structure, van der Waals forces between layers, and sp² hybridized carbon atoms in a hexagonal planar structure.

20 Easy

20 of 85

Remembering +4 | -1

{C_{60}}

an allotrope of carbon contains

View answer and explanation

Correct option: B

20 hexagons and 12 pentagons

Option B (20 hexagons and 12 pentagons) is correct because C60 fullerene contains 20 hexagons and 12 pentagons.

21 Easy

21 of 85

Analyzing +4 | -1

Assertion: Tin is a highly reactive element, especially at high temperatures.

Reason: The valency of tin is two, which means it can easily form bonds with other elements.

View answer and explanation

Correct option: D

Assertion is false, but Reason is true

The correct answer is D because tin is not highly reactive, and while it has a valency of four, the assertion about its reactivity is false.

22 Easy

22 of 85

Remembering +4 | -1

Which form of carbon is used in making boot polish, printing ink, paint and black varnish?

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Correct option: D

Lamp black

The correct answer is D (Lamp black) because lamp black is a fine black pigment produced from the soot of burned oil and is commonly used in boot polish, printing ink, paint, and black varnish.

23 Easy

23 of 85

Understanding +4 | -1

Difference between diamond and graphite is due to:

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Correct option: C

The crystal structure in diamond is different from that in graphite

Option C (The crystal structure in diamond is different from that in graphite) is correct because the distinct properties of diamond and graphite arise from their differing crystal structures.

24 Easy

24 of 85

Remembering +4 | -1

Which of the following oxide is amphoteric?

View answer and explanation

Correct option: D

\mathrm{Sn}{\mathrm{O}_2}

Option D (

\mathrm{Sn}{\mathrm{O}_2}

) is correct because tin(IV) oxide (

\mathrm{Sn}{\mathrm{O}_2}

) is a well-known amphoteric oxide, reacting with both acids and bases.

25 Easy

25 of 85

Remembering +4 | -1

Buckminster fullerene is

View answer and explanation

Correct option: B

C-60

Option B (C-60) is correct because Buckminsterfullerene is a specific allotrope of carbon with 60 carbon atoms arranged in a spherical structure.

26 Easy

26 of 85

Remembering +4 | -1

Butter of tin is:

View answer and explanation

Correct option: B

SnC{l_4}.5{H_2}O

Option B (

SnC{l_4}.5{H_2}O

) is correct because this is the chemical formula for butter of tin.

27 Easy

27 of 85

Remembering +4 | -1

Purest form of silica is :

View answer and explanation

Correct option: A

Quartz

Option A (Quartz) is correct because Quartz is the purest form of silica.

28 Easy

28 of 85

Understanding +4 | -1

Highest electronegativity among the following is for:

View answer and explanation

Correct option: A

Option A (C) is correct because electronegativity generally decreases down a group in the periodic table, and carbon is the highest element in the given group.

29 Easy

29 of 85

Understanding +4 | -1

Which of the following is amphoteric?

View answer and explanation

Correct option: B

\mathrm{Pb}{\mathrm{O}_2}

Option B (PbO2) is correct because lead(IV) oxide can act as both an acid and a base, depending on the reaction conditions.

30 Easy

30 of 85

Remembering +4 | -1

Which of the following anions is present in the chain structure of silicates

View answer and explanation

Correct option: B

\left( {Si{O_3}} \right)_n^{2n}

The correct answer is B (

\left( {Si{O_3}} \right)_n^{2n - }

) because chain silicates have the general formula (SiO3)n2n-.

Revision notes and key takeaways

Review 14 TH GROUP ELEMENTS (P-BLOCK) in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 85 single-correct-answer MCQs on 14 TH GROUP ELEMENTS (P-BLOCK).
✓ 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.

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