Back to P-BLOCK ELEMENTS

Your Progress

0 / 344 Answered

Correct

Incorrect

Accuracy

JEE • CHEMISTRY • P-BLOCK ELEMENTS

P-block elements practice · Easy

Choose an answer to check it, or open “View answer” to study the explanation. Sign in to save progress to your account.

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 301-330 of 344 questions

Preparing practice and saved progress…

301 Easy

301 of 344

Analyzing +4 | -1

S-I: Oxygen is more electronegative than sulphur, yet

{H}_2{S}

is acidic, while

{H}_2{O}

is neutral.

S-II:

{H}-{S}

bond is weaker than

{O}-{H}

bond.

View answer and explanation

Correct option: A

Both S-I and S-II are true

Option A (Both S-I and S-II are true) is correct because oxygen is more electronegative than sulfur, yet H2S is acidic while H2O is neutral, and the H-S bond is weaker than the O-H bond.

302 Easy

302 of 344

Analyzing +4 | -1

Assertion:

Cl,Br

and

I

show disproportionation, but

F

doesn't.

Reason: This is because it is the most electronegative element of the group.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

Option A (If both Assertion and Reason are correct and Reason is the correct explanation of Assertion) is correct because fluorine's high electronegativity prevents it from disproportionating, as it is already in its most oxidized state.

303 Easy

303 of 344

Understanding +4 | -1

Which of the following is most volatile?

View answer and explanation

Correct option: D

\mathrm{HI}

Option D (

\mathrm{HI}

) is correct because HI has the weakest intermolecular forces (van der Waals forces) among the given hydrogen halides, leading to the highest volatility.

304 Easy

304 of 344

Understanding +4 | -1

Which of the following will not release

\mathrm{NO}_2

upon reaction with

\mathrm{HNO}_3

(in respective conditions).

View answer and explanation

Correct option: A

\mathrm{Cu}

in dilute

\mathrm{HNO}_3

acid

Option A (

\mathrm{Cu}

in dilute

\mathrm{HNO}_3

acid) is correct because copper reacts with dilute nitric acid to produce nitric oxide (NO), not nitrogen dioxide (

\mathrm{NO}_2

305 Easy

305 of 344

Understanding +4 | -1

Assertion (A) : Anhydrous

\mathrm{H}_2 \mathrm{SO}_4

undergoes autoprotolysis

\mathrm{H}_2 \mathrm{SO}_4+\mathrm{H}_2 \mathrm{SO}_4 \rightleftharpoons \mathrm{H}_3 \mathrm{SO}_4^{+}+\mathrm{HSO}_4^{-}

Reason (R) : Anhydrous

\mathrm{H}_2 \mathrm{SO}_4

has very high electrical conductivity.

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 anhydrous

\mathrm{H}_2 \mathrm{SO}_4

does undergo autoprotolysis, and it has high electrical conductivity, but the conductivity is not the direct reason for autoprotolysis.

306 Easy

306 of 344

Remembering +4 | -1

Which metal forms an amphoteric oxide?

View answer and explanation

Correct option: D

Option D (Zn) is correct because Zinc (Zn) forms an amphoteric oxide (ZnO), which reacts with both acids and bases.

307 Easy

307 of 344

Analyzing +4 | -1

Which possesses least stable covalent P-H bond?

View answer and explanation

Correct option: D

PH_6^ +

Option D (

PH_6^+

) is correct because it is not a known compound, so it cannot possess a stable P-H bond.

308 Easy

308 of 344

Remembering +4 | -1

Which is the most easily liquefiable rare gas?

View answer and explanation

Correct option: A

Option A (Xe) is correct because the ease of liquefaction increases with increasing atomic size and intermolecular forces.

309 Easy

309 of 344

Remembering +4 | -1

Welding of magnesium can be done in an atmosphere of:

View answer and explanation

Correct option: B

Option B (He) is correct because Helium is an inert gas and prevents magnesium from reacting with the atmosphere during welding.

310 Easy

310 of 344

Understanding +4 | -1

Which of the following is CORRECT about Nitric Acid?

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because concentrated nitric acid is a strong oxidizing agent, it oxidizes moist iodine to iodic acid, and chromium does not dissolve in concentrated nitric acid due to the formation of a passive oxide film.

311 Easy

311 of 344

Remembering +4 | -1

Ozone turns tetramethyl base paper:

View answer and explanation

Correct option: B

Violet

Option B (Violet) is correct because ozone reacts with tetramethyl base paper to produce a violet color.

312 Easy

312 of 344

Remembering +4 | -1

Among the following which one is a liquid?

View answer and explanation

Correct option: C

Se{F_4}

Option C (

Se{F_4}

) is correct because Selenium tetrafluoride (

Se{F_4}

) exists as a liquid at room temperature, while Sulfur tetrafluoride (

S{F_4}

) is a gas and Tellurium tetrafluoride (

Te{F_4}

) is a solid.

313 Easy

313 of 344

Remembering +4 | -1

Freons are:

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because Freons are chlorofluorocarbons (CFCs), and

CC{l_2}{F_2}

CFC{l_3}

, and

CCl{F_3}

are all examples of CFCs.

314 Easy

314 of 344

Remembering +4 | -1

Colour of bromine in

C{S_2}

is :

View answer and explanation

Correct option: B

Orange

Option B (Orange) is correct because the color of bromine in

C{S_2}

is orange.

315 Easy

315 of 344

Understanding +4 | -1

Formula of iodine phosphate is:

View answer and explanation

Correct option: C

IP{O_4}

Option C (

IP{O_4}

) is correct because iodine phosphate has the formula

IP{O_4}

, indicating an ionic compound with

I^{3+}

and

PO_4^{3-}

ions.

Explore Other Chapters in CHEMISTRY

View All →

Equilibrium 696 MCQs STRUCTURE OF ATOM 634 MCQs THERMODYNAMICS 536 MCQs CHEMICAL BONDING & MOLECULAR STRUCTURE 514 MCQs SOLUTIONS 480 MCQs CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES 455 MCQs

316 Easy

316 of 344

Remembering +4 | -1

The electrolysis of brine solution to manufacture chlorine is carried out in the:

View answer and explanation

Correct option: C

Nelson cell

Option C (Nelson cell) is correct because the Nelson cell is an electrolytic cell specifically designed for the electrolysis of brine solution to produce chlorine gas.

317 Easy

317 of 344

Remembering +4 | -1

Arsenic acid is:

View answer and explanation

Correct option: B

{H_3}As{O_4}

Option B (

{H_3}As{O_4}

) is correct because the chemical formula for Arsenic acid is

{H_3}As{O_4}

318 Easy

318 of 344

Understanding +4 | -1

{P_4}{O_{10}}

has short and long P—O bonds.The number of short P—O bonds in this compound is:

View answer and explanation

Correct option: D

Option D (4) is correct because P4O10 has four P=O double bonds, which are shorter than the P-O single bonds.

319 Easy

319 of 344

Remembering +4 | -1

Ordinary oxygen contains:

View answer and explanation

Correct option: C

\mathrm{A\;mixture\;of\;}{\mathrm{O}^{16}},\mathrm{\;}{\mathrm{O}^{17}}\mathrm{\;and\;}{\mathrm{O}^{18}}\mathrm{\;isotopes}

Option C is correct because ordinary oxygen exists as a mixture of isotopes O-16, O-17, and O-18.

320 Easy

320 of 344

Analyzing +4 | -1

A gas does not turn lime water milky, supports the combustion of burning magnesium. It has no smell and is colourless. It extinguishes a glowing splint but under some circumstances reacts with oxygen and hydrogen. It is not poisonous. The gas is likely to be :

View answer and explanation

Correct option: B

Nitrogen

Option B (Nitrogen) is correct because nitrogen is a colorless, odorless gas that does not turn lime water milky, supports the combustion of magnesium, extinguishes a glowing splint, and can react with oxygen and hydrogen under certain conditions.

321 Easy

321 of 344

Remembering +4 | -1

Concentrated nitric acid on heating decomposes to give:

View answer and explanation

Correct option: D

N{O_2}

and

{O_2}

The correct answer is D (NO₂ and O₂) because concentrated nitric acid decomposes upon heating to produce nitrogen dioxide (NO₂), water, and oxygen (O₂).

322 Easy

322 of 344

Understanding +4 | -1

Assertion (A) : In aqueous solution,

\mathrm{SO}_2

reacts with

\mathrm{H}_2 \mathrm{S}

forming sulphur.

Reason (R):

\mathrm{SO}_2

is an effective reducing agent.

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 is correct because both the assertion and reason are true, but the reason does not explain the assertion.

323 Easy

323 of 344

Remembering +4 | -1

In Birkeland and Eyde process, the temperature of the electric arc is about:

View answer and explanation

Correct option: C

{3000^ \circ }C

Option C (

{3000^ \circ }C

) is correct because the Birkeland-Eyde process requires a very high temperature (around 3000°C) to dissociate nitrogen molecules.

324 Easy

324 of 344

Remembering +4 | -1

Oleum is

View answer and explanation

Correct option: C

Fuming

{H_2}S{O_4}

Option C (Fuming

{H_2}S{O_4}

) is correct because Oleum is a solution of sulfur trioxide in sulfuric acid, also known as fuming sulfuric acid.

325 Easy

325 of 344

Remembering +4 | -1

Noble gases are:

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because noble gases are indeed colorless, odorless, tasteless, and non-inflammable.

326 Easy

326 of 344

Analyzing +4 | -1

Which of the following statements regarding properties of halogens are correct?

(i) Due to small size electron gain enthalpy of fluorine is less than that of chlorine.

(ii) Iodine has same physical state but different colour as compare to other members of the group.

(iii) Fluorine shows no positive oxidation state.

(iv) In

X_2(g)+H_2O(l) \to HX (aq) + HOX (aq)

(where

X_2=Cl

Br)

(v)

F_2

is the strongest oxidising halogen.

View answer and explanation

Correct option: B

(i), (iii), (iv) and (v)

Option B ((i), (iii), (iv) and (v)) is correct because it accurately describes the properties of halogens, including the electron gain enthalpy of fluorine, the absence of positive oxidation states for fluorine, the reaction of halogens with water, and the oxidizing strength of fluorine.

327 Easy

327 of 344

Understanding +4 | -1

Which one is most stable to heat -

View answer and explanation

Correct option: D

{HClO}_4

Option D is correct because as the oxidation state of the central halogen atom increases, the halogen-oxygen bond becomes more covalent, increasing thermal stability.

328 Easy

328 of 344

Remembering +4 | -1

Ammonium salts are oxidized in the soil to nitrites by:

View answer and explanation

Correct option: B

Nitrifying bacteria

Option B (Nitrifying bacteria) is correct because nitrifying bacteria are responsible for the oxidation of ammonium salts to nitrites in the soil.

329 Easy

329 of 344

Understanding +4 | -1

The noble gases are unreactive because they:

View answer and explanation

Correct option: D

Have stable electronic configuration or closed valency shell

Option D (Have stable electronic configuration or closed valency shell) is correct because noble gases are unreactive due to their complete octet, resulting in a stable electronic configuration.

330 Easy

330 of 344

Analyzing +4 | -1

An inorganic salt (A) is decomposed on heating to give two products (B) and (C). Compound (C) is a liquid at room temperature and is neutral to litmus while the compound (B) is a colourless neutral gas. Compounds (A), (B) and (C) are

View answer and explanation

Correct option: A

{NH}_4{NO}_3,{N}_2{O},{H}_2{O}

Option A (

{NH}_4{NO}_3,{N}_2{O},{H}_2{O}

) is correct because ammonium nitrate decomposes into dinitrogen monoxide and water, matching the description.

Revision notes and key takeaways

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

Showing 301-330 of 344 questions

Your Progress

P-block elements practice · Easy

Explore Other Chapters in CHEMISTRY

Continue Your Practice

Your practice