Page 104 - Science Class 6 Times Publication

b. The smallest particle of matter which can take part in a
chemical reaction is called

i. Molecule ii. Atom

iii. Particle iv. All of these

c. The process of change of a liquid substance into its solid form
is called

i. Melting ii. Evaporation

iii. Freezing iv. Condensation

d. Sublimation occurs in

i. Camphor ii. Iodine
iii. Ammonium chloride iv. All of these

e. How many elements have been discovered so far?
i. 109 ii. 118

iii. 112 iv. 92

2. Copy the correct statements and correct the wrong

statements if any:
a. Matter is any thing which has mass, volume and occupies space.
b. Solid is a form of matter in which molecules are tightly
packed.

c. Intermolecular force is more but intermolecular space is less
in solid than in gas.
d. The process of changing solid into liquid on heating is called
solidi cation.
e. The process of changing solid into vapour on heating and

vapour back into solid on cooling is called sublimation.
f. Rain occurs due to change in state of matter.

Times' Crucial Science and Environment 100 Book 6