NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 388 - 394 of 1258

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Question number: 388

» States of Matter » Gaseous State » Gas Laws - Boyle's Law, Charle's Law, Graham's Law of Diffusion

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MCQ▾

Question

The speed possessed by most of the gaseous molecules is?

Choices

Choice (4) Response

a.

Average speed

b.

Root mean square speed

c.

Most propable speed

d.

None of the above

Question number: 389

» Atomic Structure » De-Broglie's Relationship

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MCQ▾

Question

with what velocity must an electron travel so that its momentum is equal to that of a photon of wavelength =5200 Å?

Choices

Choice (4) Response

a.

1235m/s

b.

1400m/s

c.

1300m/s

d.

1200m/s

Question number: 390

» Hydrogen » Preparation, Properties and Uses of Hydrogen

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MCQ▾

Question

Ortho and Para hydrogen differ in?

Choices

Choice (4) Response

a.

in the molecular mass

b.

in the nature of spins of electrons

c.

in the nature of spins of protons

d.

in the number of protons

Question number: 391

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

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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.

Question does not provide sufficient data or is vague

Question number: 392

» Atomic Structure » Shapes of S, P and D - Orbitals

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MCQ▾

Question

The orbital having m =- 2 should be present in the following sub-shell.

Choices

Choice (4) Response

a.

p

b.

s

c.

d

d.

None of the above

Question number: 393

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

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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.

68 g

b.

0.68 g

c.

0.068 g

d.

6.8g

Question number: 394

» States of Matter » Gaseous State » Concept of Average, Root Mean Square and Most Probable Velocities

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MCQ▾

Question

At what temperature is the root mean square speed of N2 gas equal to that of propane gas at STP?

Choices

Choice (4) Response

a.

173.7K

b.

273 K

c.

-40 ℃

d.

173.7℃