Question # 1

Canal rays are actually

Choose an answer

Electrons

Protons

Neutrons

X-rays

Which of the following result in discovery of proton?

Choose an answer

cathode rays

canal rays

x-rays

alpha rays

Who discovered the proton?

Choose an answer

Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

In ________________ Rutherford's was studying radiations.

Choose an answer

1911

1931

1921

1922

For diagnosis of goiter in thyroid gland we use

Choose an answer

Co-60

C-14

I-131

Sr-90

L shell can accommodate ________________ electrons.

Choose an answer

2

8

18

32

The number of electrons in K shell of O is ________________

Choose an answer

9

10

2

1

The isotopes of an element have different number of

Choose an answer

Electrons

Protons

Neutrons

Protons & Neutrons

In isotopes numbers of ________________ is same.

Choose an answer

Protons

Electrons

Neutrons

Mass number

Atoms of elements combine chemically to form:

Choose an answer

Mixtures

compounds

solutions

ions

The boiling point of H2O is:

Choose an answer

100

12

1.105

9

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

Choose an answer

cobalt-60

iodine-131

strontium-90

phosphorus-30

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