Which is a permanent change which cannot be reversed?
Chemical change
Physical change
Temporary change
Conversion of water to ice
Which one of the following always in a state of motion?
Molecules
Elements
Compounds
Mixtures
All matter can be split into tiny units called:
elements
compounds
mixtures
molecules
Which of the following liquids dissolve in water?
Alcohol
Kerosene
Petrol
Diesel
Which of the following is soluble in water?
salt
chalk
kerosene
diesel
In which of the following, the molecules are separated by large empty spaces?
solids
liquids
gases
In which of the following, the molecules are very close to each other?
complexes
Which one of the following has a definite volume, but no definite shape?
Liquid
Solid
Gas
Oxygen
Which is the smallest unit of a substance that has all the properties of that substance?
molecule
Atoms of different kinds combine and form:
