Question

2. State whether the following statements are 'True' or 'False'.
a. Change in the phases of Moon is a periodic change.[]
b. No new substance is formed in a chemical change.[]
c. Rusting of iron is a fast change.[]
d. Most metals contract on heating.[]
e. Sublimation of camphor is an irreversible change.[]​

Answer 1

Answer:

true

false

false

false

false

Explanation:

yes changes in the phases of moon is a periodic change

every time when there is a chemical change each new substance is formed and it is a Irreversible change

rusting of iron is a very slow change it happens within a period of time not very fast

most metals expand on heating and not contract

sublimation of camphor is a reversible change because when the vapours of camphor is heated it changes into solid

Answer 2

Answer:

a. true

b. false

c. true

d. false

e. true