Question # 1

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

The atomic number of sodium is ............... .

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9

10

11

12

It is heterogeneous mixture

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Sand

Milk

Air

Brass

Which of the following can be separated by physical means?

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Mixture

Element

Compound

Radical

One carbon is _________ times heavier than hydrogen.

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12

13

14

15

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

Which one of the following pair has the same mass?

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1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

_____________ revolves in orbits around nucleus.

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Electron

Proton

Neutrons

Nil

The valency of nitrogen is

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1

2

3

4

An ion is a charged particles:

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True

False

In some conditions

Never

Potassium's atomic no. is :

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17

18

19

20

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9th Class Chemistry Chapter 1 Fundamentals of Chemsitry English Medium KPK Boards Online Mcqs MCQs With Answers

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