Chemistry Class-11: Chapter –9. Hydrogen Part – 6

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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 you 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. Find Out as Many Correlations as You Can.
Correlate the items listed in Column I with those listed in Column II. Find out as many correlations as you can.

Column I

Column II

(i)

Synthesis gas

(a)

(ii)

Dihydrogen

(b)

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

Column I

Column II

(i)

Electrolysis of water produces

(a)

Atomic reactor

(ii)

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

Column I

Column 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:

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