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NAT I Engineering Chemistry MCQs With Answers

Question # 1

Hess's law deals with

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Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas

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Question # 2

Heating a micture of sodium benzoate and soda lime gives

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Benzene

Methane

Sodium benzoate

Calcium benzoate

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Question # 3

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

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Question # 4

The essential component of organic compound is

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Question # 5

The number of electrons in the M shell of the element with number 24 is

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Question # 6

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

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Question # 7

The valence orbital configuration of an element with atomic number 23 is

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3d⁵

3d³, 4s²

3d³,4s¹,4p¹

3d²,4s²,4p¹

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Question # 8

Gooch crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

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Question # 9

According to MO Theory the species O⁺₂ possesses

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

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Question # 10

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

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Question # 11

The alkali metal which is liquid at 15°C is

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None

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