GRADE 08 (UNIT 04)

What is the conclusion of the activity shown by the figure?

• Continuous nature of solid matter.

• Discontinuous nature of liquid matter.

• Discontinuous nature of solid matter.

• Continuous nature of gaseous matter.

What is the group which has a solid, liquid and gas respectively?

• Copper, Mercury, Iron.

• Copper, Water, Oxygen.

• Iron, Ice, Nitrogen.

• Iron, Oxygen, Mercury.

Select the property only present in solids.

• Has a definite volume.

• Particles move freely.

• Has a definite shape.

• Can be compressed.

Not a physical property of matter.

• Density.

• Compressibility.

• Volume.

• Rusting of metal.

What are the elements present in the compound Copper sulphate ?

• Copper, Sodium, Sulphur.

• Copper, Oxygen, Carbon.

• Oxygen, Copper, Sulphur.

• Sulphur, Carbon, Oxygen.

Which chemical in the laboratory is a solid with yellow colour?

• Calcium carbonate.

• Sulphur.

• Copper sulphate.

• Condis.

What is the incorrect statement for the observation when a piece of condis has been put into a beaker of water?

• The colour of condis spreads in water.

• Condis particles enter into water particles.

• Condis particles enter throughout water particles.

• Particulate nature can be proved from this activity.

What is the ascending order of densities of Gold, Aluminium, Water and Mercury respectively?

• Gold < Mercury < Aluminium < Water.

• Water < Aluminium < Mercury < Gold.

• Mercury < Aluminium < Gold < Water.

• Aluminium < Water < Gold < Mercury.

Out of these, what is a property of metals?

• Being a poor heat conductor.

• Having a low melting point.

• Brittleness.

• Being a heat and electric conductor.

Out of the following, which answer includes only solid metals ?

• Calcium, Copper, Zinc, Iron.

• Zinc, Lead, Iodine, Aluminium.

• Zinc, Iron, Mercury, Carbon.

• Carbon, Sulphur, Magnesium, Sodium.