Hydrogen

(A) \(\mathrm{HOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \longrightarrow \mathrm{H}_{3} \mathrm{O}++\mathrm{Cl}^{-}+\mathrm{O}_{2}\)

(B) \(\mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}_{2}+2 \mathrm{OH}^{-} \longrightarrow 2 \mathrm{I}^{-}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}\)

Choose the correct option

[JEE Main 2021, 24 Feb (Shift 1)]

The correct statement about \(\mathrm{H}_{2} \mathrm{O}_{2}\) are:

(A) Used in the treatment of effluents.

(B) Used as both oxidizing and reducing agents

(C) The two hydroxyl groups lie in the same plane.

(D) Miscible with water.

Choose the correct answer from the options given below:

[JEE Main 2021, 16 Mar (Shift 2)]

Statement-I: Permutite process is more efficient compared to the synthetic resin method for the softening of water.

Statement-II: Synthetic resin method results in the formation of soluble sodium salts.

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

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

Assertion (A): The dihedral angles in \(\mathrm{H}_{2} \mathrm{O}_{2}\) in gaseous phase is \(90.2^{\circ}\) and in solid phase is \(111.5^{\circ}\).

Reason (R): The change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces.

Choose the most appropriate answer from the options given below

[JEE Main 2021, 20 Jul (Shift 1)]

The amount of \({\mathrm{H}}_{2}{\mathrm{O}}_{2}\) present in 1 liter of 1.5 N \({\mathrm{H}}_{2}{\mathrm{O}}_{2}\) solution is

Which of the following statements are NOT correct?

A. Hydrogen is used to reduce heavy metal oxides to metals.

B. Heavy water is used to study reaction mechanism.

C. Hydrogen is used to make saturated fats from oils

D. The \(\mathrm{H}-\mathrm{H}\) bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element.

E. Hydrogen reduces oxides of metals that are more active than iron.

Choose the most appropriate answer from the options given below:

[NEET 2023]

Which of the following statements are NOT correct?

A. Hydrogen is used to reduce heavy metal oxides to metals.

B. Heavy water is used to study reaction mechanism.

C. Hydrogen is used to make saturated fats from oils

D. The H–H bond dissociation enthalpy is lowest as compared to a single bond between two atoms of any element.

E. Hydrogen reduces oxides of metals that are more active than iron.

Choose the most appropriate answer from the options given below:

[NEET 2023]

Which of the following can reduce decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\) on exposure to light

[JEE Main 2023, 8 Apr (Shift 2)]

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

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

Choose the most appropriate answer from the options given below:

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

The water gas on reacting with cobalt as a catalyst forms

[JEE Main 2023, 8 Apr (Shift 1)]