Let's Exercise
1. Choose the correct option.
a. Which of the following processes is not an example of a physical change?
i. Condensation
ii. Melting
iii. Boiling
iv. Burning
b. A change is called a chemical change, if___________.
i. there is no change in energy
ii. it can always be reversed
iii. a new substance is formed
iv. only the state of matter change
c. Freezing of ice is a/ an.
i. chemical and reversible change
iii. physical and reversible change
ii. physical and irreversible change
iv. chemical and irreversible change
d. Formation of curd from milk is a/ an-___________
i. physical and irreversible change
iii. chemical and undesirable change
ii. irreversible and desirable change
iv. physical and desirable change
earance, properties
e. Germination of seed is a
i. fast change
iii. desirable change
ii. reversible change
iv. physical change
Eural changes while
substance are altered
mical properties of a
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