NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 400 - 406 of 1258

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Question number: 400

» Hydrogen » Physical and Chemical Properties of Water

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MCQ▾

Question

Hard water is not suitable for washing clothes because?

Choices

Choice (4) Response

a.

It contains impurities

b.

It gives insoluble precipitates

c.

It is acidic in nature

d.

It contains Na2SO4 and KCl

Question number: 401

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

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MCQ▾

Question

Oxygen at 1 atmosphere and 0℃ has a density of 1.4290 g L-1. Find the rms speed of oxygen molecule?

Choices

Choice (4) Response

a.

345.2

b.

34.52

c.

461.15

d.

46.11

Question number: 402

» Hydrogen » Preparation, Properties and Uses of Hydrogen

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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.

1: 3

b.

1: 1

c.

2: 1

d.

3: 1

Question number: 403

» States of Matter » Gaseous State » Van Der Waals Equation

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MCQ▾

Question

The units of “a” in Vander Waal’s equation is?

Choices

Choice (4) Response

a.

atom litre 2 mol-2

b.

atom litre mol-1

c.

atom litre2mol-1

d.

atom litre mol-2

Question number: 404

» Atomic Structure » Hund's Rule

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MCQ▾

Question

The total spin resulting from a d7 configuration is –

Choices

Choice (4) Response

a.

2

b.

c.

1

d.

Question number: 405

» Hydrogen » Physical and Chemical Properties of Water

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

water is lighter than petrol

b.

Hydrogen bonding

c.

petrol is lighter than water

d.

Question does not provide sufficient data or is vague

Question number: 406

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

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MCQ▾

Question

In alkaline medium, H2O2 reacts with Fe+3 and Mn+2 separately to give?

Choices

Choice (4) Response

a.

b.

c.

d.