Physical and Chemical changes

Q.

Fractional distillation is the separation of a mixture of miscible liquids into its component parts based on the difference in their boiling points. Based on this information, Fractional distillation is a __________ process.

1. It is a special type of distillation
2. All of these

3. Separation of a mixture into its component parts

4. Separation of components occur due to difference in their boiling point

Q.

Change of water into steam is a:

1. physical change

2. chemical change

3. physical and chemical change

4. biological change

Q. Burning of wood and rusting of iron bar are examples of ___________ changes.

1. physical

2. chemical

3. physical and chemical

4. biological

Q. Digestion of food is a physical change.

1. True
2. False

Q. The interconversion of a substance from one state of matter to another is an example of a ___ change.

Q.

Burning of a candle is ___ .

1. a chemical change

2. a physical and a chemical change

3. a physical change

4. biological change

Q. Burning of a candle is an example of a :

1. both physical & chemical change
2. physical change
3. chemical change
4. None of the given options

Q.

We observe that some portion of wax (in candle) melts and other portion of it is used in producing heat and light.
Statement A: The melting of wax is a physical change
Statement B: The burning of wax for the production of heat and light is a chemical change.
State which of the statement(s) is/are true.

1. Both Statement A and Statement B are true

2. Both Statement A and Statement B are false

3. Only Statement A is true
4. Only Statement B is true

Q. Three substances given below are kept in the open for a few days and some changes were observed.

Which of the substances will show a chemical change?

1. Eggs
2. Plastic bottle
3. Both eggs & moth balls
4. All eggs, plastic bottle and moth balls

Q. Which of the following is/are example(s) of physical change?

1. interconversion between states of matter
2. breaking a glass
3. burning of coal
4. digestion of food