Question

(b)
Tick () the correct option:
1. A pure substance is something that
(a) is made up of one kind of molecules ·
(b) is made up of different kinds of molecules
(c) is made up of more than one kind of
dissimilar molecules
(d) none of these
2. Air is
(a)
a pure substance
(b) a mixture
(c) a compound of oxygen and nitrogen
(d) a compound of oxygen and nitrogen
3. A mixture of sand and iron fillings is best
separated by
(a) sedimentation
(b) winnowing
(c) magnetic separation
(d) hand-picking
4. The components of a mixture are separated
(a) to obtain two different useful products
(b) to remove harmful components or impurities
(c) to remove non-useful components of a
mixture
10. The process of
liquid state on cooling is ca
(a) evaporation
(c) filtration (d) lc
II. Fill in the blanks:
1. Tea leaves are removed by
from the brew.
2. In the kitchen, the grains are
3. Seawater contains a lot of sa
by
4. Solubility of gases
temperature.
III. Tick (V) the correct and
statement:
1. Milk is not a mixture.
2. Water purifiers purify w
boiling.
3. Farmers clean the grain
hand-picking
4. Solution of salt in water
separated by filtration.
5
Different constituents c​

Answer 1

Answer:

1. a
2. b
3. c

Explanation:

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