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JEE • CHEMISTRY • HYDROGEN

Hydrogen 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 61-76 of 76 questions

61 Easy

61 of 76

Remembering +4 | -1

Which of the following metals absorbs Hydrogen

View answer and explanation

Correct option: B

Pd

Option B (

Pd

) is correct because Palladium is well-known for its ability to absorb hydrogen.

62 Easy

62 of 76

Analyzing +4 | -1

Which of the following cannot be oxidized by

\mathrm{H}_2 \mathrm{O}_2

View answer and explanation

Correct option: B

\mathrm{O}_3

Option B (

\mathrm{O}_3

) is correct because ozone is a stronger oxidizing agent than hydrogen peroxide, so H2O2 cannot oxidize it.

63 Easy

63 of 76

Remembering +4 | -1

For the bleaching of hair, the substance used is:

View answer and explanation

Correct option: C

{\mathrm{H}_2}{\mathrm{O}_2}

Option C (

{\mathrm{H}_2}{\mathrm{O}_2}

) is correct because hydrogen peroxide is commonly used for bleaching hair due to its oxidizing properties.

64 Easy

64 of 76

Understanding +4 | -1

The decomposition of

{\mathrm{H}_2}{\mathrm{O}_2}

can be slowed down by the addition of small amount of phosphoric acid which acts as:

View answer and explanation

Correct option: C

Inhibitor

Option C (Inhibitor) is correct because phosphoric acid acts as a negative catalyst, slowing down the decomposition of hydrogen peroxide.

65 Easy

65 of 76

Remembering +4 | -1

In the case of

{\mathrm{H}_2}{\mathrm{O}_2}

,the angle between the planes containing the hydrogen atom is:

View answer and explanation

Correct option: B

90\mathrm{ }^\circ

Option B (

90\mathrm{ }^\circ

) is correct because the angle between the planes containing the hydrogen atoms in

{\mathrm{H}_2}{\mathrm{O}_2}

is approximately 90 degrees.

66 Easy

66 of 76

Application +4 | -1

The weight percentage of deuterium in heavy water is:

View answer and explanation

Correct option: D

Option D (20) is correct because the weight percentage of deuterium in heavy water (D2O) is calculated based on the molar mass ratio.

67 Easy

67 of 76

Remembering +4 | -1

The method used to remove temporary hardness of water is:

View answer and explanation

Correct option: B

Clark’s method

Option B (Clark’s method) is correct because Clark's method is specifically used for removing temporary hardness of water by reacting bicarbonates with slaked lime.

68 Easy

68 of 76

Understanding +4 | -1

Hydrogen peroxide does not:

View answer and explanation

Correct option: C

Give silver peroxide with moist silver oxide

Option C (Give silver peroxide with moist silver oxide) is correct because hydrogen peroxide does not react with moist silver oxide to give silver peroxide.

69 Easy

69 of 76

Remembering +4 | -1

Which hydride is neutral?

View answer and explanation

Correct option: B

{\mathrm{H}_2}\mathrm{O}

Option B (

{\mathrm{H}_2}\mathrm{O}

) is correct because water (

{\mathrm{H}_2}\mathrm{O}

) is a neutral hydride with a pH of 7.

70 Easy

70 of 76

Remembering +4 | -1

In the preparation of hydrogenated oil the chemical reaction involving hydrogen is called:

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Correct option: A

Hydrogenation

Option A (Hydrogenation) is correct because the addition of hydrogen to unsaturated fats to produce hydrogenated oil is specifically called hydrogenation.

71 Easy

71 of 76

Remembering +4 | -1

In Bosch’s process which gas is utilised for the production of hydrogen gas?

View answer and explanation

Correct option: B

Water gas

Option B (Water gas) is correct because the Bosch process uses water gas (CO + H₂) to produce hydrogen gas.

72 Easy

72 of 76

Understanding +4 | -1

In one of these compounds does hydrogen have an oxidation state of

- 1

View answer and explanation

Correct option: D

Ca{H_2}

Option D (

Ca{H_2}

) is correct because in metal hydrides like calcium hydride, hydrogen has an oxidation state of -1.

73 Easy

73 of 76

Remembering +4 | -1

Water is said to be permanently hard when it contains:

View answer and explanation

Correct option: A

Chlorides of

Ca\,\,\,{\text{and}}\,\,\,Mg

Option A (Chlorides of

Ca

and

Mg

) is the correct answer because permanent hardness in water is caused by the presence of chlorides and sulfates of calcium and magnesium.

74 Easy

74 of 76

Remembering +4 | -1

The number of radioactive isotopes of hydrogen is:

View answer and explanation

Correct option: A

Option A (1) is correct because only tritium (

^3H

) is a radioactive isotope of hydrogen.

75 Easy

75 of 76

Remembering +4 | -1

Which one of the following is used for reviving the
exhausted permutit?

View answer and explanation

Correct option: D

10 \% \mathrm{~NaCl}

solution

Option D (

10 \% \mathrm{~NaCl}

solution) is correct because sodium chloride solution is used to regenerate exhausted permutit.

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76 Easy

76 of 76

Remembering +4 | -1

\mathrm{D}_{2} \mathrm{O}

is used more in

View answer and explanation

Correct option: A

Nuclear reactor

Option A (Nuclear reactor) is correct because deuterium oxide (D2O) is commonly used as a moderator in nuclear reactors to slow down neutrons.

Revision notes and key takeaways

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