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NAT I Engineering Chemistry MCQs With Answers

Question # 1

Chile salt petre is

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NaNO₃

Na₂SO₄

KNO₃

Na₂S₂O₃

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Question # 2

Which of the following alkali metal hydroxides is the strongest base?

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LiOH

NaOH

KOH

CaOH

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Question # 3

Hybridization explain the------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

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Question # 4

Ethanol containing some methanol is called

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Absolute spirit

Rectified spriit

Power alcohol

Methylated spirit

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Question # 5

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 # 6

In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will

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Also be doubled

Be halved

Becomes one fourth

Remains the same

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Question # 7

Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about

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Two inches

Three inches

Five inches

Six inches

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Question # 8

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

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Question # 9

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

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Question # 10

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

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Question # 11

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

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