Which of the following liquids dissolve in water?

Which one of the following has a definite volume, but no definite shape?

Heating or cooling brings about changes in:

In which of the following, the molecules are separated by large empty spaces?

In which of the following, the molecules are very close to each other?

Which is a permanent change which cannot be reversed?

In which of the following, the molecules are less closely packed?

Which is the smallest unit of a substance that has all the properties of that substance?

What do fish and other animals that live in water breathe?

All matter can be split into tiny units called: