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JEE Advanced

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

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Q 1. {tex} \mathrm { Ag } _ { 2 } \mathrm { O } + \mathrm { H } _ { 2 } \mathrm { O } _ { 2 } \rightarrow 2 \mathrm { Ag } + \mathrm { H } _ { 2 } \mathrm { O } + \mathrm { O } _ { 2 } {/tex}
In an above reaction {tex} \mathrm { H } _ { 2 } \mathrm { O } _ { 2 } {/tex} acts as/an

A

Oxidizing agent

Reducing agent

C

Bleaching agent

D

None of these

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Q 2. How does {tex} \mathrm { H } _ { 2 } \mathrm { O } _ { 2 } {/tex} differ from {tex} \mathrm { O } _ { 3 } {/tex} in its chemical action?

A

In oxidizing {tex}\mathrm{PbS}{/tex} to {tex}\mathrm{PbSO_4}{/tex}

B

In librating {tex} \mathrm { I } _ { 2 } {/tex} from {tex}\mathrm{KI}{/tex}

In decolorizing acidified {tex}\mathrm{KMnO_4}{/tex}

D

In oxidizing {tex} \mathrm { K } _ { 4 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex} to {tex} \mathrm { K } _ { 3 } \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] {/tex}

Explanation

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Q 3. Select the incorrect statement

A

{tex} \mathrm { H } ^ { + } {/tex} can exist as {tex} \mathrm { H } _ { 9 } \mathrm { O } _ { 4 } ^ { + } {/tex} in water

B

{tex} \mathrm { H } _ { 2 } {/tex} is thermally stable

Ionisation of {tex} \mathrm { CH } _ { 3 } \mathrm { COOH } {/tex} is slower than that of {tex} \mathrm { CH } _ { 3 } \mathrm { COOD } {/tex}

D

Kinetic isotopic effect is observed when there is retardation in the rate water {tex} \mathrm { H } _ { 2 } \mathrm { O } {/tex} is replaced by {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex}

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Q 4. Consider the following reactions
I: {tex} \mathrm { AlH } _ { 3 } + \mathrm { H } ^ { - } \rightarrow \mathrm { AlH } _ { 4 } ^ { - } {/tex}
II: {tex} \mathrm { H } _ { 2 } \mathrm { O } + \mathrm { H } ^ { - } \rightarrow \mathrm { H } _ { 2 } + \mathrm { OH } ^ { - } {/tex}
Select the correct statements based on these reactions

A

{tex} \mathrm { H } ^ { - } {/tex} is a Lewis acid in I and Lewis base in II

{tex} \mathrm { H } ^ { - } {/tex} is a Lewis base in I and Bronsted base in II

C

{tex} \mathrm { H } ^ { - } {/tex} is a Lewis acid in I and Bronsted acid in II

D

{tex} \mathrm { H } ^ { - } {/tex} is a Lewis base in I and II

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Q 5. {tex} \mathrm { H } _ { 2 } {/tex} reacts much faster with {tex} \mathrm { Cl } _ { 2 } {/tex} than {tex} \mathrm { D } _ { 2 } {/tex}, because

A

Rate of diffusion of {tex} \mathrm { H } _ { 2 } {/tex} is greater than {tex} \mathrm { D } _ { 2 } {/tex}

{tex} \mathrm { H } _ { 2 } {/tex} has lower energy of activation than {tex} \mathrm { D } _ { 2 } {/tex}

C

Both (a) and (b) are correct

D

None of the statements is correct

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Q 6. Which among the following is a hydride?

A

Rongalite

B

Nitrolim

Hydrolith

D

Minium

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Q 7.

Consider the following statements

and forms of hydrogens are

I. different due to difference in their nuclear spins

II. different due to difference in their electrons spins

III. have same physical properties

I II III

A

T F

B

F T F

T F

D

T F T

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Q 8.

This represents

A

Oxidation of

B

Reduction of

Disproportionation of

D

Acidic nature of

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Q 9.

is used as but not as

A

Oxidant, reductant

B

Bleaching agent

C

Antiseptic

Catalyst

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Q 10.

Which of the following easily reacts with water producing hydrogen?

A

C

D

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Q 11.

Molar ratio of oxidised by one mole of in basic and acidic medium is

A

1:1

B

1:2

3:5

D

5:3

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Q 12.

Hydrogen

A

Is placed in I A since it forms monovalent cation

B

Is placed in VII A (halogen family) since it forms monovalent anion

C

Is placed in IV A (carbon family) since both have a half-filled shell of electrons

Follows all of the above facts

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Q 13.

Perhydrol is

A

30% solution of

“100 volume”

C

Both (a) and (b) are correct

D

None of the above is correct

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Q 14.

Select the correct statement(s)

A

reduces to in acidic medium

B

reduces to in basic medium

C

can be used to bleach blackened oil paintings

All the above are correct statements

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Q 15.

can be obtained from

A

Water gas by liquefaction of at low temperature under pressure

B

Water gas by oxidation of into (by steam) which can be easily removed by dissolving in

C

Electrolysis of water

All the above methods

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Q 16.

The set of elements which could form stable, covalent hydrogen bonded hydrides are

Nitrogen, oxygen and fluorine

B

Lithium, sodium and potassium

C

Sulphur, selenium and tellurium

D

Chlorine, bromine and iodine

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Q 17.

The volume of oxygen librated at NTP from of 20 volume is

A

C

D

Explanation

20 volume” means

gives at

Thus, gives at

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Q 18.

The hardness of water is estimated by

EDTA method

B

Titrimetric method

C

Conductivity method

D

Distillation method

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Q 19.

Which is radioactive isotope of hydrogen?

A

B

D

All of those

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Q 20.

Which is not the correct statement?

A

-block elements, except and , form ionic hydride

B

and are intermediate hydride

C

-block elements form covalent hydride

-and -block elements form ionic hydride

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Q 21.

Heavy water is

A

Water at

B

Water containing heavy ions

D

Water containing sulphate of

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Q 22.

has maximum density at

A

C

D

0 K

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Q 23.

The most stable is

A

B

C

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Q 24.

Water gas is a mixture of

A

and

B

and

and

D

and

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Q 25.

Dil. and oxide react to produce hydrogen peroxide. The oxide is

A

B

C