Question # 1

Electron ________________ energy when they jump from low to higher level.

Choose an answer

Absorb

Radiate

Nothing

Nil

The number of electrons in K shell of O is ________________

Choose an answer

9

10

2

1

Deuterium is used to make:

Choose an answer

light water

heavy water

soft water

hard water

Alpha particles are double charged.

Choose an answer

Negative

Positive

Can be both

Nil

________________ proposed that matter is composed of small particles.

Choose an answer

Greek

English's

Russian

Nil

The isotopes C-12 is present in abundance of:

Choose an answer

96.6%

97.6%

99.7%

None of these

Which radioisotope is used for the diagnosis of tumor in the body?

Choose an answer

cobalt-60

iodine-131

strontium-90

phosphorus-30

Cathode rays are actually

Choose an answer

Electrons

Protons

Neutrons

Photons

For diagnosis of goiter in thyroid gland we use

Choose an answer

Co-60

C-14

I-131

Sr-90

Half life of C-14 ________________ years.

Choose an answer

5800

5700

5600

5500

When U-235 breaks up, it produces?

Choose an answer

electrons

neutrons

protons

nothing

Which of the following result in discovery of proton?

Choose an answer

cathode rays

canal rays

x-rays

alpha rays

Which one of the following shell consists of three subshells?

Choose an answer

K- shell

M-Shell

L-shell

M-shell

More Classes

Other Links

Chemistry 9th Class English Medium Unit 2 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer