When water is filled in a bottle and is allowed to freeze, the bottle breaks because

A. Water expands on freezing
B. Bottle contracts at freezing point
C. 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

The property by virtue of which metals can be beaten into thin sheets is known as?

A. Ductility
B. Malleability
C. Conductivity
D. Density

Steering of a car involves?

A. A single force
B. Two forces acting in the same direction
C. Two forces acting along different lines and in opposite direction.
D. A pair of forces acting along the same line and in opposite direction

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
Fuse-wire Is made up of tin-lead alloy (63% tin + 37% lead). It should have low melting point and high resistivity. It is used in series as a safety device in an electric circuit and is designed so as to melt and thereby open the circuit if the current exceeds a predetermined value due to some fault.