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NAT II Biological Science Chemistry MCQs With Answers

Question # 1

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

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Question # 2

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

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Question # 3

Potassium crystallizes with a

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Orthogonal lattice

Cubic lattice

Triclinic

Ortho rhombic lattice

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Question # 4

In a crystal a≠b≠c, a =γ= 90° andβ≠90°. It is

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Monoclinic

Rhombic

Trigonal

Tetragonal

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Question # 5

Calcium cyanamide on treatment with steam under pressure gives NH₃and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

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Question # 6

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these.

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Question # 7

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

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Question # 8

Which of the following process is used to separate insoluble particles from liquids?

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Seperation

Filtration

Crystallization

Condensation

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Question # 9

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

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Question # 10

Which one is the property of an ideal solvent?

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

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Question # 11

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

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Decreases

Increases

Remain constant

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

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