Question # 1

The no.of neutrons in deutrium is

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1

2

3

4

First energy level is denoted by:

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K

L

M

N

Deuterium is used to make:

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light water

heavy water

soft water

hard water

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

The boiling point of H2O is:

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100

12

1.105

9

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

________________ orbital is more complex in shape.

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s

p

f

d

In isotopes numbers of ________________ is same.

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Protons

Electrons

Neutrons

Mass number

Half life of C-14 ________________ years.

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5800

5700

5600

5500

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

In a discharge tube, the pressure of a gas is kept at

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

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9th Class Chemistry Chapter 2 Structure of Atoms English Medium KPK Boards Online Mcqs MCQs With Answers

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