p-Block Elements Practice Questions

JEE · Chemistry · 1271 free MCQs with instant results and detailed explanations.

1271

Total

245

Easy

568

Medium

458

Hard

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Topics in p-Block Elements

Group 13 to 18 141

Boron Family 160

Carbon Family 167

Nitrogen Family 150

Oxygen Family 170

Halogens 143

Noble Gases 167

Interhalogen Compounds 173

Sample Questions from p-Block Elements

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Easy

Which of the following elements is NOT a part of Group 13 in the periodic table?

A. Aluminum

B. Gallium

C. Boron

D. Carbon

Show Answer & Explanation

Correct Answer: D

Carbon is a Group 14 element, while Aluminum, Gallium, and Boron belong to Group 13.

Easy

Which of the following compounds of Group 14 elements is known for its use as a semiconductor?

A. Silicon Dioxide

B. Lead Sulfide

C. Silicon

D. Germanium

Show Answer & Explanation

Correct Answer: C

Silicon is widely used as a semiconductor material in electronic devices.

Easy

Which of the following compounds is an example of a boron compound that exhibits Lewis acid behavior?

A. BCl3

B. B2H6

C. Na3BO3

D. Al2O3

Show Answer & Explanation

Correct Answer: A

BCl3 acts as a Lewis acid because it can accept a pair of electrons due to the incomplete octet of boron.

Medium

Which of the following elements has the highest electronegativity in Group 13?

A. Boron

B. Aluminium

C. Gallium

D. Indium

Show Answer & Explanation

Correct Answer: A

Boron has the highest electronegativity in Group 13 due to its small size and high effective nuclear charge.

Medium

Which compound is expected to show the strongest Lewis acidity among the following?

A. BCl3

B. AlCl3

C. GaCl3

D. InCl3

Show Answer & Explanation

Correct Answer: B

AlCl3 is more Lewis acidic than the others due to its ability to form stable complexes with electron donors.

Medium

What is the primary oxidation state of Thallium in TlCl3?

A. 0

B. +1

C. +3

D. -1

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Correct Answer: C

In TlCl3, Thallium exhibits a +3 oxidation state to balance with three chloride ions.

Medium

Which of the following elements does not form a stable +5 oxidation state?

A. Phosphorus

B. Arsenic

C. Antimony

D. Bismuth

Show Answer & Explanation

Correct Answer: D

Bismuth does not exhibit a stable +5 oxidation state due to its lower electronegativity and higher size.

Hard

Which of the following statements about the Group 13 elements is incorrect?

A. Boron has a high melting point compared to aluminium.

B. Thallium shows +1 oxidation state more commonly than +3.

C. Gallium has a lower melting point than aluminium.

D. Indium exhibits a +5 oxidation state.

Show Answer & Explanation

Correct Answer: D

Indium generally does not exhibit a +5 oxidation state; it primarily shows +1 and +3 states.

Hard

Which of the following oxides is amphoteric?

A. Al2O3

B. B2O3

C. Ga2O3

D. Tl2O3

Show Answer & Explanation

Correct Answer: A

Aluminum oxide (Al2O3) is amphoteric, reacting with both acids and bases.

Q10

Hard

What is the primary reason for the increase in the covalent character of Group 14 hydrides down the group?

A. Increase in atomic size.

B. Decrease in electronegativity.

C. Increase in ionization energy.

D. Increase in bond length.

Show Answer & Explanation

Correct Answer: A

As atomic size increases down the group, the covalent character of hydrides increases due to decreased bond strength.

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p-Block Elements — JEE Chemistry Practice Questions Online

This page contains 1271 practice MCQs for the chapter p-Block Elements in JEE Chemistry. The questions are organized by difficulty — 245 easy, 568 medium, 458 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 8 topics, giving you comprehensive coverage of the entire chapter.