(A) electric current

(B) electric field

(C) acceleration

(D) linear momentum

A) C2H6O

B) HCl

C) Na2CO3

D) NaCl

(A)  cosmic rays

(B) X-rays

(C) radio waves

(D) microwaves

(A) liquid dispersed in gas

(B) solid dispersed in a liquid

(C) liquid dispersed in solid

(D) gas dispersed in a liquid

A) Polarization and interference

B) Diffraction and dispersion

C) Multiple refraction and dispersion

D) Multiple reflection and interference

(A) centre of gravity

(B) centripetal force

(C) centrifugal force

(D) moment of force

(A) metallic

(B) ionic

(C) molecular

(D) covalent-network

(A) virtual and upright

(B) virtual and inverted

(C) real and inverted

(D) real and upright

(A) nuclear fusion

(B) nuclear fission

(C) radioactivity

(D) artificial radioactivity

(A)  at an elevated position

(B) falling

(C) at rest

(D) moving