Pasteurisation of milk is
Physical and reversible change.
Chemical and reversible change.
Chemical and irreversible change.
Neither physical nor a chemical change.
Nitrogen reacts with hydrogen under high temperature and pressure and forms ammonia. Which type of change is undergone in the given example?
A physical change
A natural change
An electric change
A chemical change
Food which we eat in our daily life is digested at regular intervals of time. This is a:
Cannot be determined
Burning of a candle is:
a physical change
a chemical change
a physical and a chemical change
Clotting of blood is an example of _____ change.
The process of fractional distillation is used to separate mixtures of miscible liquids.
All changes need not be ____
all of the above
physical and chemical
- Formation of curd from milk
- Dissolution of sugar in water
- Cutting of paper into bits
- Melting of an ice cube