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NAT I Engineering Chemistry MCQs With Answers

Question # 1

SO₂ and NO₂ pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

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Question # 2

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

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Question # 3

Bell metal is an alloy of

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Cu,Zn,and Sn

Cu,Zn and Ni

Cu and Zn

Cu and Sn

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Question # 4

With increasing principle quantum number the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remains constant

Decreases for low value of Z and increases for higher value of Z.

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Question # 5

Mark the smallest atom

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Question # 6

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyl acetate

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Question # 7

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

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Question # 8

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

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Question # 9

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

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LiOH

NaOH

KOH

CaOH

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Question # 10

Gooch crucible is used for the filtration of precipitates having

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High solubility

High concentration

High ignition temperature

Low temperature

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Question # 11

Which of the following has least mass?

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2 gram atom of nitrogen

3 x 10²³ atoms of C

1 mole of S

7.0 g of Ag.

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