How will you concentrate $H_{2} O_{2}$ ? Show differences between structures of $H_{2} O_{2}$ and $H_{2} O$ by drawing their spatial structures. Also mention three important uses of $H_{2} O_{2}$ .

Important Questions on Hydrogen

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 72

Give a method for the manufacture of hydrogen peroxide and explain the reactions involved therein.

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 72

Illustrate oxidising, reducing, and acidic properties of hydrogen peroxide with equations.

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 73

What mass of hydrogen peroxide will be present in

2

litres of a

5

molar solution? Calculate the mass of oxygen which will be liberated by the decomposition of

200 mL

of this solution.

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 74

A colourless liquid $‘ A ’$ contains $H$ and $O$ elements only. It decomposes slowly on exposure to light. It is stabilised by mixing urea to store in the presence of light.

(i) Suggest possible structure of $A$ .

(ii) Write chemical equations for its decomposition reaction in light.

MEDIUM

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 75

An ionic hydride of an alkali metal has significant covalent character and is almost unreactive towards oxygen and chlorine. This is used in the synthesis of other useful hydrides. Write the formula of this hydride. Write its reaction with

{Al}_{2} {Cl}_{6}

.

HARD

11th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 76

Sodium forms a crystalline ionic solid with dihydrogen. The solid is non-volatile and non-conducting in nature. It reacts violently with water to produce dihydrogen gas. Write the formula of this compound and its reaction with water. What will happen on electrolysis of the melt of this solid.