NEET Chemistry: Questions 451 - 456 of 677

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Question number: 451

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

How many significant figures are in each of the following numbers?

(1) 4.003 (2) 6.023×1023 (3) 5000

Choices

Choice (4) Response

a.

4, 4, 4

b.

3, 4, 3

c.

4, 3, 2

d.

3, 4, 1

Question number: 452

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

MCQ▾

Question

The oxide that gives hydrogen peroxide on treatment with a dilute acid is?

Choices

Choice (4) Response

a.

MnO2

b.

Na2O2

c.

TiO2

d.

PbO2

Question number: 453

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

MCQ▾

Question

A sample of a gas occupies a volume of 512 ml at 20℃ and 74 cm of Hg as pressure. What volume would this gas occupy at STP?

Choices

Choice (4) Response

a.

580 ml

b.

485.3 ml

c.

546 ml

d.

464.5 ml

Question number: 454

» Atomic Structure » Spin Quantum Number

MCQ▾

Question

Find out the maximum number of electrons in any energy level. (If n = 2)

Choices

Choice (4) Response

a.

Six electrons

b.

Two electrons

c.

Eight electrons

d.

Four electrons

Question number: 455

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

MCQ▾

Question

Rate of diffusion of a gas is directly proportional to?

Choices

Choice (4) Response

a.

Square of its molecular mass

b.

inversely proportional to the square root of its density

c.

its molecular mass

d.

its density

Question number: 456

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

A tennis ball have mass 6.0×102kg is moving with a speed of 62m/s. calculate the wavelength associated with the ball.

Choices

Choice (4) Response

a.

3.84 × 10 - 36m

b.

8.9×1034m

c.

5.6 × 10 - 34m

d.

1.8×1034m

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