NEET (National Eligibility cum Medical Entrance Test) Chemistry: Questions 467 - 473 of 1145

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Question number: 467

» Hydrogen » Physical and Chemical Properties of Water

MCQ▾

Question

What is the tolerable amount of hardness of water in ppm in domestic usage?

Choices

Choice (4) Response

a.

100 - 200 ppm

b.

150 - 200 ppm

c.

100 ppm

d.

100 - 150 ppm

Question number: 468

» States of Matter » Liquid State » Surface Tension

MCQ▾

Question

When there is a rise in temperature the surface tension will be?

Choices

Choice (4) Response

a.

Decreases

b.

Increase

c.

Does not vary

d.

None of the above

Question number: 469

» Hydrogen » Physical and Chemical Properties of Water

MCQ▾

Question

The hardness of water sample containing 0.002 mole of magnesium sulphate dissolved in a litre is expressed as?

Choices

Choice (4) Response

a.

2000ppm

b.

20 ppm

c.

120 ppm

d.

200 ppm

Question number: 470

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

MCQ▾

Question

What is the volume of oxygen liberated at NTP by complete decomposition of 100 ml of 2M solution of hydrogen peroxide?

Choices

Choice (4) Response

a.

2.24 L

b.

22.4 L

c.

224 L

d.

0.224 L

Question number: 471

» Atomic Structure » Quantum Mechanical Model of Atom

MCQ▾

Question

In hydrogen, an electron in its normal state absorbs two times of the energy, as it requires escaping (13.6 eV) from the atom, the wavelength of the emitted electron will be -

Choices

Choice (4) Response

a.

2.34 x 10-10 m

b.

3.46 x 10-10 m

c.

4.44 x 10-10 m

d.

1.34 x 10-10 m

Question number: 472

» States of Matter » Gaseous State » Kinetic Theory of Gases

MCQ▾

Question

What is average kinetic energy per mole of CO2 gas at 27℃ in ergs (units)?

Choices

Choice (4) Response

a.

3.741×10-10 erg

b.

374×108 erg

c.

374×10-8 erg

d.

3.741×1010 erg

Question number: 473

» States of Matter » Gaseous State » Concept of Absolute Scale of Temperature

MCQ▾

Question

The critical temperature of gas is that temperature?

Choices

Choice (4) Response

a.

at which the volume of the gas becomes zero

b.

above which it can no longer remain in the gaseous state

c.

at which it solidifies

d.

above which it cannot be liquefied by pressure

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