HARD
11th CBSE
IMPORTANT
Earn 100

Match the items in Column I with the relevant item in Column II.

Column I Column II
(i) Hydrogen peroxide is used as a (a) zeolite
(ii) Used in Calgon method (b) perhydrol
(iii) Permanent hardness of hard water is removed by (c) sodium hexametaphosphate
    (d) propellant

 

Important Questions on Hydrogen

MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 69
Atomic hydrogen combines with almost all elements but molecular hydrogen does not. Explain.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 70
How can D2O be prepared from water? Mention the physical properties in which D2O differs from H2O. Give at least three reactions of D2O showing the exchange of hydrogen with deuterium.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 9 - Hydrogen>Long Answer Type>Q 71
How will you concentrate H2O2? Show differences between structures of H2O2 and H2O by drawing their spatial structures. Also mention three important uses of H2O2.
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 Al2Cl6.