(A) Calcium carbonate
(B) Calcium phosphate
(C) Calcium sulphate
(D) Calcium nitrate

(A) Precipitation
(B) Hailstorm
(C) Condensation 
(D) Formation of ice

(A) Einstein
(B) Newton
(C) Gahleo
(D) Hubble

(A) 0°C
(B) 4°C
(C) 4° K
(D) 4.8°C

A. A binocular
B. A camera
C. An epidiascope
D. A stereoscope

(A) Surface tension
(B) Viscosity
(C) Specific gravity
(D) Elasticity

(A) Viscosity of ink
(B) Capillary action phenomenon
(C) Diffusion of ink through the blotting
(D) Siphon action

(A) Increasing the temperature of the water
(B) Reacting chemically with dirt
(C) Reducing the surface tension of water
(D) Dissolving dirt

(A) The hair barging against the charged comb
(B) Small electric sparks
(C) The rubbing of the comb with the hair
(D) None of the above

(A) Steam can penetrate the skin
(B) Steam is at a higher temperature
(C) Steam contains more energy than boiling water
(D) Steam is at a higher pressure