Chemistry Class-11: Chapter – 9: Hydrogen Part – 6 Questions and Answers (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question: 53

With the help of suitable examples, explain the property of that is responsible for its bleaching action?

Question: 54

Why is water molecule polar?

Question: 55

Why does water show high boiling point as compared to hydrogen sulphide? Give reasons for your answer.

Question: 56

Why can dilute solutions of hydrogen peroxide not be concentrated by heating? How can a concentrated solution of hydrogen peroxide be obtained?

Question: 57

Why is hydrogen peroxide stored in wax lined bottles?

Question: 58

Why does hard water not form lather with soap?

Question: 59

Phosphoric acid is preferred over sulphuric acid in preparing hydrogen peroxide from peroxides. Why?

Question: 60

How will your account for 104.5° bond angle in water?

Question: 61

Write redox reaction between fluorine and water.

Question: 62

Write two reactions to explain amphoteric nature of water.

IV. Matching Type

Question: 63

Correlate the items listed in Column I with those listed in Column II. Find out as many correlations as you can.

Correlate the Items Listed in Column I with Those Listed in Column II
Column IColumn II
(i)Synthesis gas(a)
(ii)Dihydrogen(b)Oxidizing agent
(iii)Heavy water(c)Softening of water
(iv)Calgon(d)Reducing agent
(v)Hydrogen peroxide(e)Stoichiometric compounds of s-block elements
(vi)Salt like hydrides(f)Prolonged electrolysis of water
(g)
(h)
(i)Synthesis of methanol
(j)Mixture of and

Answer:

Question: 65

Match the terms in Column I with the relevant item in Column II

Match the Terms in Column I with the Relevant Item in Column II
Column IColumn II
(i)Electrolysis of water produces(a)Atomic reactor
(ii)Lithium aluminum hydride is used as(b)Polar molecule
(iii)Hydrogen chloride is a(c)Recombines on metal surface to generate high temperature
(iv)Heavy water is used in(d)Reducing agent
(v)Atomic hydrogen(e)Hydrogen and oxygen

Answer:

Question: 66

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

Match the Items in Column I with the Relevant Item in Column II
Column IColumn I
(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

Answer: