Page 2 - HA Physical and chemical changes
P. 2
Vegetables Plastic bottle Naphthalene balls
Which of the substances will show chemical changes?
1. Vegetables
2. Plastic bottle
3. both vegetables and naphthalene balls
4. All of these
Q.4.Pooja took a candle and heated it. The wax started melting; it
changed its shape and state. What kind of change is this?
1. Irreversible change
2. Physical change
3. Chemical change
4. None of these
SUBJECTIVE QUESTIONS
Q.1. When a cut apple is exposed to air, it starts turning
brown after some time. Is it a physical change or a chemical
change? Why?
Q.2.Can you recognize the chemical and physical changes that happen all around us? If you
change the way something looks, but haven’t made a new substance, a physical change (P)
has occurred. If the substance has been changes into another substance, a chemical change
(C) has occurred.
