Which of the following is a physical change?

Which of the following involves a chemical change?

Which of these is not a chemical change?

Formation of curd from milk is an example of

When iron reacts with oxygen in the presence of moisture, it forms

The process of burning magnesium ribbon in air produces

Which of the following shows both physical and chemical changes?

Which change involves formation of a precipitate?

When food is digested in our body, it is a

Rusting of iron can be prevented by