Which of the following material is hard, opaque and shines when freshly cut ?
Rubber
Wood
Tin
Plastic
Kerosene floats on water because
Kerosene has more density
Kerosene has less energy
Densities of water and kerosene and equal
Water has more density
Clay is used for making pots and bricks because it is:
Opaque
Non magnetic
A good conductor of heat
Easily moulded into different shapes
By dropping a drop of water on a glowing electric blub, it bursts. This is because glass is a:
Good conductor of heat
Bad conductor of heat
Transparent substance
Good conductor of electricity
1 kg of iron occupies less space compared to 1 kg of sponge. Why ?
Iron has less density than sponge
Iron and sponge have equal densities
Iron has more density than sponge
None
Opaque objects:
Reflect most of the light falling on them
Transmit most of the light falling on them
Absorb most of the light falling on them
Are strong and hard
Paper bags are preferred over plastic ones because
Plastic bags are light
Paper bags are stronger
Plastic bags are not biodegradable
Paper bags are not biodegradable
A mirror is
Transparent
Tanslucent
A needle and a knife belong to the same group because:
They are transparent
They are hard and magnetic
They float on water
They are poor conductors of heat
A vendor sells white powdered salt mixed with white powdered stone. The knowledge of which properly will help you detect this malpractice?
Ductility
Opacity
Density
Solubility
