Hydrogen

In which of the following reactions of hydrogen peroxide acts as an oxidizing agent (either in acidic, alkaline, or neutral medium)?
(i) \(2F{e}^{+2}+{H}_{2}{O}_{2}\to\)
(ii) \(2{\mathrm{MnO}}_{4}^{-}+6{\mathrm{H}}^{+}+5{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to\)
(iii) \({I}_{2}+{H}_{2}{O}_{2}+2O{H}^{-}\to\)
(iv) \(M{n}^{+2}+{H}_{2}{O}_{2}\to\)

Given below are two statements :
Statement-I : Methane and steam passed over a heated Ni catalyst produces hydrogen gas.
Statement-II : Sodium nitrite reacts with \(\mathrm{NH}_4 \mathrm{Cl}\) to give \(\mathrm{H}_2 \mathrm{O}, \mathrm{N}_2\) and \(\mathrm{NaCl}\).
In the light of the above statements, choose the most appropriate answer from the options given below :

[JEE Main 2023, 11 Apr (Shift 1)]

Statements about heavy water are given below:

(A) Heavy water is used in exchange reactions for the study of reaction mechanisms.

(B) Heavy water is prepared by exhaustive electrolysis of water

(C) Heavy water has higher boiling point than ordinary water.

(D) Viscosity of \(\mathrm{H}_{2} \mathrm{O}\) is greater than \(\mathrm{D}_{2} \mathrm{O}\).

Choose the most appropriate answer from the options given below:

[JEE Main 2021, 26 Feb (Shift 1)]

Among the following, the correct statements are:
I. LiH, Be\({H}_{2}\) and Mg\({H}_{2}\) are saline hydrides with significant covalent character
II. Saline hydrides are volatile
III. Electron - precise hydrides are Lewis bases
IV. The formula for chromium hydride is CrH

Among the following, the correct statements are:
I. LiH, Be\({H}_{2}\) and Mg\({H}_{2}\) are saline hydrides with significant covalent character
II. Saline hydrides are volatile
III. Electron - precise hydrides are Lewis bases
IV. The formula for chromium hydride is CrH

In which of the following reactions of hydrogen peroxide acts as an oxidizing agent (either in acidic, alkaline, or neutral medium)?
(i) \(2F{e}^{+2}+{H}_{2}{O}_{2}\to\)
(ii) \(2{\mathrm{MnO}}_{4}^{-}+6{\mathrm{H}}^{+}+5{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to\)
(iii) \({I}_{2}+{H}_{2}{O}_{2}+2O{H}^{-}\to\)
(iv) \(M{n}^{+2}+{H}_{2}{O}_{2}\to\)

Given below are two statements :
Statement-I : Methane and steam passed over a heated Ni catalyst produces hydrogen gas.
Statement-II : Sodium nitrite reacts with \(\mathrm{NH}_4 \mathrm{Cl}\) to give \(\mathrm{H}_2 \mathrm{O}, \mathrm{N}_2\) and \(\mathrm{NaCl}\).
In the light of the above statements, choose the most appropriate answer from the options given below :

[JEE Main 2023, 11 Apr (Shift 1)]

The reaction of \(\mathrm{H}_{2} \mathrm{O}_{2}\) with potassium permanganate in acidic medium leads to the formation of mainly

[JEE Main 2022, 25 Jul (Shift 1)]

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.

Reason (R): Hydrogen is the lightest element

In the light of the above statements, choose the correct answer from the options given below:

[JEE Main 2021, 24 Feb (Shift 2)]

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

The equation that represents the water-gas shift reaction is

[JEE Main 2020, 5 Sep (Shift 1)]

In an ice crystal, each water molecule is hydrogen bonded to .......... neighbouring molecules.

[JEE Main 2023, 6 Apr (Shift 2)]

Given below are two reactions, involved in the commercial production of dihydrogen (H₂). The two reactions are carried out at temperature "T₁" and "T₂" respectively

\(\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{H}}_{2}\mathrm{O}\overset{{\mathrm{T}}_{1}}{\to }\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_{2}\left(\mathrm{g}\right)\)

\(\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_{2}\mathrm{O}\left(\mathrm{g}\right)\overset{{\mathrm{T}}_{2}}{\to }{\mathrm{CO}}_{2}\left(\mathrm{g}\right)+{\mathrm{H}}_{2}\left(\mathrm{g}\right)\)

The temperature T₁ and T₂ are correctly related as

Which one of the following methods is most suitable for preparing deionized water?

[JEE Main 2021, 26 Aug (Shift 1)]

Which one of the following metals forms interstitial hydride easily?

[JEE Main 2021, 25 Jul (Shift 2)]

Ionic hydrides reacts with water to give

Hydrogen has three isotopes (a), (b) and (c). If the number of neutron(s) in (a), (b) and (c) respectively, are (x), (y) and \((\mathrm{z})\), the sum of \((\mathrm{x}),(\mathrm{y})\) and \((\mathrm{z})\) is:

Which one of the following statements is incorrect?

[JEE Main 2021, 31 Aug (Shift 2)]

Hydrogen peroxide reacts with iodine in basic medium to give:

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by

(A) Liquid water
(B) Ice
(C) Impure water

[JEE Main 2023, 24 Jan (Shift 1)]

The functional groups that are responsible for the ion exchange property of cation and anion exchange resins, respectively, are:

[JEE Main 2021, 17 Mar (Shift 2)]

Which hydride among the following is less stable? [JEE Main 2023, 11 Apr (Shift 2)]

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion A: Isotopes of hydrogen have almost same chemical properties, but difference in their rates of reaction.

Reason R: Isotopes of hydrogen have different enthalpy of bond dissociation.

In the light of the above statements, choose the most appropriate answer from the options given below:

[JEE Main 2023, 13 Apr (Shift 2)]

At \(298.2 K\) the relationship between enthalpy of bond dissociation ( in \(kJ mol ^{-1}\) ) for hydrogen \(\left( E _{ H }\right.\) ) and its isotope, deuterium \(\left(E_D\right)\), is best described by:

[JEE Main 2021, 25 Jul (Shift 1)]

Water does not produce \(\mathrm{CO}\) on reacting with:

[JEE Main 2021, 25 Feb (Shift 2)]

The INCORRECT statement(s) about heavy water is (are)

(A) used as a moderator in nuclear reactor

(B) obtained as by-product in fertilizer industry

(C) used for the study of reaction mechanism

(D) has a higher dielectric constant than water

Choose the correct answer from the options given below:

[JEE Main 2021, 17 Mar (Shift 1)]

Dihydrogen of high purity ( \(>99.95 \%)\) is obtained through:

[JEE Main 2020, 6 Sep (Shift 2)]

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

' 25 volume' hydrogen peroxide means

[JEE Main 2023, 25 Jan (Shift 1)]

Hydrogen has three isotopes (a), (b) and (c). If the number of neutron(s) in (a), (b) and (c) respectively, are (x), (y) and \((\mathrm{z})\), the sum of \((\mathrm{x}),(\mathrm{y})\) and \((\mathrm{z})\) is:

[JEE Main 2020, 8 Jan (Shift 2)]

Which of the following equation depicts the oxidizing nature of \(\mathrm{H}_{2} \mathrm{O}_{2}\) ?

[JEE Main 2021, 25 Feb (Shift 1)]

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Physical properties of isotopes of hydrogen are different.

Reason (R): Mass difference between isotopes of hydrogen is very large.

In the light of the above statements, chose the correct answer from the options given below:

[JEE Main 2023, 10 Apr (Shift 2)]

Which one of the following statements is incorrect?

[ JEE Main 2021, 31 Aug (Shift 2)]

Which of the given compounds can enhance the efficiency of hydrogen storage tank?

[JEE Main 2023, 29 Jan (Shift 1)]

The single largest industrial application of dihydrogen is

[JEE Main 2021, 20 Jul (Shift 2)]

During water-gas shift reaction

[JEE Main 2023, 15 Apr (Shift 1)]

The starting material for convenient preparation of deuterated hydrogen peroxide \(\left(\mathrm{D}_{2} \mathrm{O}_{2}\right)\) in laboratory is:

[JEE Main 2023, 1 Feb (Shift 2)]

The oxide that gives \(H _2 O _2\) most readily on treatment with \(H _2 O\) is:

[JEE Main 2021, 27 Aug (Shift 2)]

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion A: Hydrogen is an environment friendly fuel.

Reason R: Atomic number of hydrogen is 1 and it is a very light element.

In the light of the above statements, choose the correct answer from the options given below

[JEE Main 2023, 1 Feb (Shift 1)]

Statement-I: \(\mathrm{H}_{2} \mathrm{O}_{2}\) is used in the synthesis of Cephalosporin

Statement-II: \(\mathrm{H}_{2} \mathrm{O}_{2}\) is used for the restoration of aerobic conditions to sewage wastes.

In the light of the above statements, choose the most appropriate answer from the options given below:

[JEE Main 2023, 31 Jan (Shift 2)]

Given below are two reactions, involved in the commercial production of dihydrogen \(\left(\mathrm{H}_{2}\right)\).

The two reactions are carried out at temperature " \(\mathrm{T}_{1}\) " and " \(\mathrm{T}_{2}\) " respectively

\(\mathrm{C}(\mathrm{s})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \xrightarrow{\mathrm{T}_{1}} \mathrm{CO}(\mathrm{g})+\mathrm{H}_{2}(\mathrm{~g})\)

\(\mathrm{CO}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \xrightarrow[\text { Catalyst }]{\mathrm{T}_{2}} \mathrm{CO}(\mathrm{g})+\mathrm{H}_{2}(\mathrm{~g})\)

The temperature \(\mathrm{T}_{1}\) and \(\mathrm{T}_{2}\) are correctly related as

[JEE Main 2023, 10 Apr (Shift 1)]

The metal salts formed during softening of hardwater using Clark's method are:

[JEE Main 2022, 28 Jul (Shift 1)]

In basic medium, \(\mathrm{H}_{2} \mathrm{O}_{2}\) exhibits which of the following reactions?

(A) \(\mathrm{Mn}^{2+} \longrightarrow \mathrm{Mn}^{4+}\)
(B) \(\mathrm{I}_{2} \longrightarrow \mathrm{I}^{-}\)
(C) \(\mathrm{PbS} \longrightarrow \mathrm{PbSO}_{4}\)

Choose the most appropriate answer from the options given below:

[JEE Main 2021, 18 Mar (Shift 2)]