11)

Solids can be classified as ______ on the basis of the nature of order present in the arrangement of their constituent particles.

SSC CPO 2020

A)

crystalline or amorphous

B)

metallic or non-metallic

C)

magnetic or non-magnetic

D)

conductor or non-conductor

12)

Name the high-frequency radiation produced in nuclear reactions and also emitted by radioactive nuclei that are used in medicine to destroy cancer cells.

SSC CPO 2020

A)

Gamma rays

B)

Ultraviolet waves

C)

Light waves

D)

X-rays

13)

______ states that for a solution of volatile liquids, the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution.

SSC CPO 2020

A)

Boyle’s law

B)

Dalton’s law

C)

Faraday’s law

D)

Raoult’s law

14)

Which of the following represents an alpha particle?

SSC CPO 2020

A)

{}_2^2He

B)

{}_2^4He ⁺⁺

C)

{}_1^1He

D)

{}_1^2He

15)

Cathode rays are a beam of:

SSC CPO 2020

A)

protons

B)

positrons

C)

electrons

D)

neutrons

16)

With symbols having their usual meanings, which one among the following is used as the standard for defining atomic mass unit?

SSC CPO 2020

A)

C-12

B)

H-1

C)

N-14

D)

O-8

17)

______ solids are formed by the three-dimensional arrangements of cations and anions bound by strong coulombic (electrostatic) forces.

SSC CPO 2020

A)

Covalent

B)

Ionic

C)

Metallic

D)

Molecular

18)

According to a law postulated by ______, the amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional to their chemical equivalent weights.

SSC CPO 2020

A)

John Dalton

B)

Joseph Fourier

C)

Michael Faraday

D)

Alfred Nobel

19)

Solubility of gases in liquids ______ with decrease in temperature.

SSC CPO 2020

A)

remains constant

B)

increases

C)

decreases

D)

first decreases and then increases

20)

______ Law of independent migration of ions states that limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte.

SSC CPO 2020

A)

Dirac

B)

Kohlrausch

C)

Schrödinger

D)

Feynman