Question # 1

Alpha particles are double charged.

Choose an answer

Negative

Positive

Can be both

Nil

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

Choose an answer

10-2 atm

10-4 atm

10-6 atm

10-8 atm

In ________________ Rutherford's was studying radiations.

Choose an answer

1911

1931

1921

1922

The concept of orbit was used by:

Choose an answer

J.J Thomson

Rutherford

Bohr

Planck

Who discovered the proton?

Choose an answer

Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

The value of Planck's constant is

Choose an answer

6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

Which one of the following shell consists of three subshells?

Choose an answer

K- shell

M-Shell

L-shell

M-shell

The isotopes of an element have different number of

Choose an answer

Electrons

Protons

Neutrons

Protons & Neutrons

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

Choose an answer

cobalt-60

iodine-131

strontium-90

phosphorus-30

"Atoms" means _________

Choose an answer

Divisible

Indivisible

Break

Nil

The p subshell has:

Choose an answer

one orbital

two orbitals

three orbitals

four orbitals

___________ is used in treatment of cancer.

Choose an answer

Cobalt-60

C-12

H-3

Nil

Which of the following result in discovery of proton?

Choose an answer

cathode rays

canal rays

x-rays

alpha rays

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

Choose an answer

h/2π

n 2h/π

n h2/2π

n h/2π

The maximum no.of electrons that can be accommodated in M shell are

Choose an answer

2

8

18

32

Atoms of elements combine chemically to form:

Choose an answer

Mixtures

compounds

solutions

ions

In ________________ Bohr considered hydrogen atom for his model .

Choose an answer

1913

1916

1917

1918

The number of electrons in K shell of O is ________________

Choose an answer

9

10

2

1

More Classes

Other Links

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer