When a ball bounces off the ground, which of the following changes suddenly? (Assume no loss of energy to the floor) 1) Its speed 2) Its momentum 3) Its kinetic ...

Which one of the following statements about glass is not correct? 1) Glass is often said to be a super cooled liquid 2) Glass has no definite melting point 3) Soda ...

In which of the following phenomena do heat waves travel along a straight line with the speed of light? 1) Thermal conduction 2) Thermal convection 3) Thermal radiation 4) Both, ...

A sample of ‘soft soap contains 1) Caesium 2) Potassium 3) Calcium 4) Magnesium

Which one of the following statements about water is not true? 1) Hydrogen bonds are present in liquid 2) Water has a high boiling point. 3) Water has a high heat ...

The raw materials used for the manufacture of Portland cement are : 1) Lime, silica and sulfur dioxide 2) Lime, silica and carbon dioxide 3) Lime, silica and alumina 4) ...

Which one of the following statements about diamond and graphite is not correct? 1) Diamond has a tetrahedral structure, whereas graphite has a hexagonal planar structure. 2) Both physical and chemical properties ...

Which one of the following is termed as ‘Dry ice’? 1) Ice present in ice-cream 2) Solid water at Antarctica 3) Solid state of carbon dioxide 4) Solid water of ...

Which one of the following substances is not a mixture? 1) Tin 2) Sea water 3) Soil 4) Air

Soaps clean surfaces on the principle based on 1) Viscosity 2) Floatation 3) Elasticity 4) Surface tension