Kerosene floats on water because
Kerosene has more density
Kerosene has less energy
Densities of water and kerosene and equal
Water has more density
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
Clinical thermometers are made up of glass. The important characteristic(s) considered for this selection is/are:
It is a bad conductor of heat
It is transparent
Both A and B
It is strong
Salt water is a
Good conductor of electricity
Bad conductor of electricity
Insulator
All the above
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
Opaque
Transparent
Tanslucent
Which of the following is suitable to make rain coats?
Cotton
Plastic
Silk
Door locks are made of metals because metals:
Have luster
Are opaque
Are good conductors of heat
Are hard and strong
Of our total body weight, about two thirds is made up of water and it is important to have a regular intake of water. This is because
Water has lots of vitamins and proteins
Water can dissolve a lot of substances
Water conducts heat very fast and there by maintains the body temperature
Water is stored as energy in our body
