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
Equal volumes of different substances
Have equal weights
Have equal densities
Need not have equal weights
Salt water is a
Good conductor of electricity
Bad conductor of electricity
Insulator
All the above
Which of the following is suitable to make rain coats?
Cotton
Plastic
Silk
Even though a cinema hall is a place prone to fire hazards, the interiors are mostly made of wood or wood based panels. Why is this so ?
Wood does not catch fire easily
Wood is opaque
Wood can absorb sound
Wood is very commonly available
Clay is used for making pots and bricks because it is:
Opaque
Non magnetic
A good conductor of heat
Easily moulded into different shapes
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
Kerosene floats on water because
Kerosene has more density
Kerosene has less energy
Densities of water and kerosene and equal
Water has more density
Which of the following material is hard, opaque and shines when freshly cut ?
Rubber
Wood
Tin
Most balloons, tyres and footballs are made of rubber. This is because rubber is:
Naturally available
Cheap
An electrical insulator
Soft and flexible
