Question

1.
Solve the puzzle with the help of clues given below:
Across
a. A change which cannot be reversed.
b. A metal which gets rusted.
f. An example of a chemical change in which energy is released.
Down
c. A change in which original condition can be re-attained.
d. The change which takes place in long duration of time.
e. A reversible change involving change of liquid into gas.​

Answer 1

a. A change which cannot be reversed.

Ans : Irreversible change

b. A metal which gets rusted.

Ans : Iron

f. An example of a chemical change in which energy is released.

Ans :  Neutralization

c. A change in which original condition can be re-attained.

Ans : Physical change

d. The change which takes place in long duration of time.

Ans :  ex: Rusting

e. A reversible change involving change of liquid into gas.​

Ans : Heating/Boiling