NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 466 - 472 of 1258

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Question number: 466

» Hydrogen » Isotopes

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MCQ▾

Question

Which of the following isotopes of hydrogen is radio active in nature?

Choices

Choice (4) Response

a.

Protium only

b.

Deuterium only

c.

Deuterium and tritium

d.

Tritium only

Question number: 467

» Hydrogen » Physical and Chemical Properties of Water

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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.

100 - 150 ppm

c.

150 - 200 ppm

d.

100 ppm

Question number: 468

» States of Matter » Liquid State » Surface Tension

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

Increase

b.

Decreases

c.

Does not vary

d.

Question does not provide sufficient data or is vague

Question number: 469

» Hydrogen » Physical and Chemical Properties of Water

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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.

200 ppm

b.

2000ppm

c.

20 ppm

d.

120 ppm

Question number: 470

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

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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.

0.224 L

b.

2.24 L

c.

224 L

d.

22.4 L

Question number: 471

» Atomic Structure » Quantum Mechanical Model of Atom

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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.

4.44 x 10-10 m

b.

2.34 x 10-10 m

c.

1.34 x 10-10 m

d.

3.46 x 10-10 m

Question number: 472

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

3.741×1010 erg

b.

374×108 erg

c.

374×10-8 erg

d.

3.741×10-10 erg