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NAT I Engineering Chemistry MCQs With Answers

Question # 1

In the manufacture of iron from haematite,limestone is added to act as.

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Flux

A reducing

Slag

An oxidizing agent.

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Question # 2

The weight of 11.2 liters of CO₂ at S.T.P. would be

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88 g

44 g

32 g

22 g

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Question # 3

The number of unpaired electrons in the P-subshell of oxygen atom

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Question # 4

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

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Question # 5

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

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Question # 6

The total pressure exerted by a number of non reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

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Question # 7

Potassium is kept in

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Water

Ammonia

alcohol

Kerosene

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Question # 8

Calcium cyanamide on treatment with steam under pressure gives NH₃ and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

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Question # 9

Which of the following will not change the concentration of ammonia in the equilibrium N₂(g) + 3H₂(g) 2NH₃(g): ΔH = -kj

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Increase of pressure

Increase of temperature

Decrease of volume

Addition of catalyst

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Question # 10

When pressure is applied to the equilibrium system Ice Water Which of the following phenomenon will happen?

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More ice will be formed

Water will evaporate

More water will be formed

Equilibrium will not be formed

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Question # 11

The formula of calcium cyanamide is

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Ca(CN)₂

CaC₂N

CaNCN

CaCHNH₂

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