Hydrogen-Structure, Preparation, Reactions and Uses of Hydrogen Peroxide (NEET Chemistry): Questions 9 - 14 of 19

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Question number: 9

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

Statues coated with white lead on long exposure to atmosphere turn black due to the formation of?

Choices

Choice (4) Response

a.

Lead oxide

b.

Lead sulphate

c.

Lead sulphide

d.

All of the above

Question number: 10

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

Excess of KI and dil H2SO4 were mixed in 50 ml H2O2. The liberated I2 requires 20 ml of Na2S2O3. Find out the strength of H2O2 in g/litre?

Choices

Choice (4) Response

a.

6.8g

b.

0.068 g

c.

68 g

d.

0.68 g

Question number: 11

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

20 ml of a sample of H2O2 gives 400 ml of oxygen measured at NTP. The sample should be labeled as:

Choices

Choice (4) Response

a.

Dil. H2O2

b.

20 vol. H2O2

c.

Anhydrous H2O2

d.

5 vol. H2O2

Question number: 12

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

In alkaline medium, H2O2 reacts with Fe+3 and Mn+2 separately to give?

Choices

Choice (4) Response

a.

Fe+2andMn+2

b.

Fe+4andMn+4

c.

Fe+2andMn+4

d.

Fe+4andMn+2

Question number: 13

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

What is the mass in grams of available oxygen per liter from a solution of H2O2, 10 ml of which when titrated with N/20 KMnO4 solution required 25 ml for the reaction?

2KMnO4+4H2SO4+5H2O22KHSO4+2MnSO4+8H2O+5O2

Choices

Choice (4) Response

a.

12 g

b.

2 g

c.

6 g

d.

15 g

Question number: 14

» Hydrogen » Structure, Preparation, Reactions and Uses of Hydrogen Peroxide

MCQ▾

Question

Decolonization of acidified potassium permanganate occurs when hydrogen peroxide is added to it. This is due to?

Choices

Choice (4) Response

a.

reduction of KMnO4

b.

oxidation of KMnO4

c.

oxidation and reduction of KMnO4

d.

All of the above

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