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JEE Advanced > Some pBlock Elements

Explore popular questions from Some pBlock Elements for JEE Advanced. This collection covers Some pBlock Elements previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

1:1

B

1:2

C

2:1

D

9:4

Q 2.

Correct4

Incorrect-1

Lead pencil contains

A

{tex} \mathrm { Pb } {/tex}

B

{tex} \mathrm { FeS } {/tex}

Graphite

D

{tex} \mathrm { PbS } {/tex}

Q 3.

Correct4

Incorrect-1

The element with the highest first ionization potential is

A

boron

B

carbon

nitrogen

D

oxygen

Q 4.

Correct4

Incorrect-1

Moderate electrical conductivity is shown by

A

silica

graphite

C

diamond

D

carborundum

Q 5.

Correct4

Incorrect-1

Chlorine acts as a bleaching agent only in presence of

A

dry air

moisture

C

sunlight

D

pure oxygen

Q 6.

Correct4

Incorrect-1

A gas that cannot be collected over water is

A

{tex} \mathrm { N } _ { 2 } {/tex}

B

{tex} \mathrm O _ { 2 } {/tex}

{tex} \mathrm { SO } _ { 2 } {/tex}

D

{tex} \mathrm { PH } _ { 3 } {/tex}

Q 7.

Correct4

Incorrect-1

The compound which gives off oxvgen on moderate heating is

A

cupric oxide

mercuric oxide

C

zinc oxide

D

aluminium oxide

Q 8.

Correct4

Incorrect-1

Bromine can be liberated from potassium bromide solution by action of

A

iodine solution

chlorine solution

C

sodium chloride

D

potassium iodide

Q 9.

Correct4

Incorrect-1

Concentrated {tex}\mathrm {HNO} _ { 3 } {/tex} reacts with iodine to give

A

{tex} \mathrm { HI } {/tex}

B

{tex} \mathrm { HOI } {/tex}

{tex} \mathrm { HOIO } _ { 2 } {/tex}

D

{tex} \mathrm { HOIO } _ { 3 } {/tex}

Q 10.

Correct4

Incorrect-1

The material used in solar cells contains

A

{tex} \mathrm { Cs } {/tex}

{tex} \mathrm { Si } {/tex}

C

{tex} \mathrm { Sn } {/tex}

D

{tex} \mathrm { Ti } {/tex}

Q 11.

Correct4

Incorrect-1

A gas {tex} ' \mathrm { X }' {/tex} is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas {tex} '\mathrm {Y } ' {/tex}. Identify {tex} '\mathrm { X } ' {/tex} and {tex} '\mathrm { Y } ' {/tex}

A

{tex} \mathrm { X } = \mathrm { CO } _ { 2 } , \mathrm { Y } = \mathrm { Cl } _ { 2 } {/tex}

B

{tex} \mathrm { X } = \mathrm { Cl } _ { 2 } , \mathrm { Y } = \mathrm { CO } _ { 2 } {/tex}

{tex} \mathrm { X } = \mathrm { Cl } _ { 2 } , \mathrm { Y } = \mathrm { H } _ { 2 } {/tex}

D

{tex} \mathrm { X } = \mathrm { H } _ { 2 } , \mathrm { Y } = \mathrm { Cl } _ { 2 } {/tex}

Explanation

Q 12.

Correct4

Incorrect-1

Which of the following isomers of phosphorus are thermodynamically least and most stable?

A

White (least), Red (most)

B

Yellow (least), Red (most)

C

Red (least), White (most)

White (least), Black (most)

Explanation


Q 13.

Correct4

Incorrect-1

Extra pure {tex} \mathrm { N } _ { 2 } {/tex} can be obtained by heating

A

{tex} \mathrm { NH } _ { 3 } {/tex} with {tex} \mathrm { CuO } {/tex}

B

{tex} \mathrm { NH } _ { 4 } \mathrm { NO } _ { 3 } {/tex}

C

{tex} \left( \mathrm { NH } _ { 4 } \right) _ { 2 } \mathrm { Cr } _ { 2 } \mathrm { O } _ { 7 } {/tex}

{tex} \mathrm { Ba } \left( \mathrm { N } _ { 3 } \right) _ { 2 } {/tex}

Explanation

Q 14.

Correct4

Incorrect-1

The reaction of white phosphorus with aqueous {tex}\mathrm {NaOH}{/tex} gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product, respectively, are

A

redox reaction, {tex} - 3 {/tex} and {tex} - 5 {/tex}

B

redox reaction, {tex} 3 {/tex} and {tex} + 5 {/tex}

disproportionation reaction, {tex} - 3 {/tex} and {tex} + 5 {/tex}

D

disproportionation reaction, {tex} - 3 {/tex} and {tex} + 3 {/tex}

Explanation