Hydrogen (NEET Chemistry): Questions 22 - 27 of 50

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Question number: 22

» Hydrogen » Preparation, Properties and Uses of Hydrogen

MCQ▾

Question

2 g of aluminum is treated separately with excess of dilute sulphuric acid and excess of NaOH. The ratio of volumes of hydrogen evolved under similar conditions of pressure and temperature is?

Choices

Choice (4) Response
a.

3: 1

b.

2: 1

c.

1: 3

d.

1: 1

Question number: 23

» Hydrogen » Physical and Chemical Properties of Water

MCQ▾

Question

Water can extinguish most fires but not petrol fire, because?

Choices

Choice (4) Response
a.

water is lighter than petrol

b.

petrol is lighter than water

c.

Hydrogen bonding

d. None of the above

Question number: 24

» 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: 25

» Hydrogen » Physical and Chemical Properties of Water

MCQ▾

Question

The temporary hardness of water due to calcium bicarbonate can be removed by adding?

Choices

Choice (4) Response
a.

Calcium carbonate

b.

Calcium chloride

c.

Calcium hydroxide

d.

Hydrochloric acid

Question number: 26

» 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: 27

» Hydrogen » Preparation, Properties and Uses of Hydrogen

MCQ▾

Question

The correct order of thermal stability of hydrides is?

Choices

Choice (4) Response
a.

AsH3 < SbH3 < BiH3 < NH3 < PH3

b.

NH3>PH3>AsH3>SbH3>BiH3

c.

AsH3>SbH3>BiH3>NH3>PH3

d.

NH3<PH3<AsH3<SbH3<BiH3

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