(A) Water expands on freezing
(B) Bottle contracts at freezing point
(C) the temperature outside the bottle is less than that inside the bottle.
(D) None of the above

(A) Prop him up if he falls
(B) Spread out his weight and reduce the pressure on the rope
(C) Add extra weight to keep the rope tightly stretched
(D) To keep the Center of gravity always above vertically above the rope

(A) Scatters blue light
(B) Reflects blue light
(C) Transmits blue light
(D) Has actual blue cover

(A) Ductility
(B) Malleability
(C) Conductivity
(D) Density

(A) Carbon dioxide
(B) Chlorofluorocarbons
(C) Nitrogen oxides
(D) Methane

(A) 63% tin and 37% lead
(B) 63% lead and 37% tin
(C) 63% tin and 37% aluminum
(D) 63% lead and 37% aluminum

(A) 20 dB
(B) 60 dB
(C) 100 dB
(D) 160 dB

(A) Increasing the length of the rod
(B) Increasing the weight of the bob
(C) Reducing the length of the rod
(D) Reducing the weight of the bob

(A) Hydrogen
(B) Helium
(C) Carbon dioxide
(D) Hydrogen Sulphide

(A) Kelvin
(B) Thomson
(C) Rutherford
(D) Becquerel