Question 1.
Butter is separated from milk by
(a) sedimentation
(b) filtration
(c) churning
(d) decantation
Answer:
(c) churning
Question 2.
Threshing is done by
(a) beating
(b) bullocks
(c) machines
(d) all of these
Answer:
(d) all of these
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Question 3.
Which method is used to separate pebbles and stones from sand?
(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Any of these
Answer:
(c) Sieving
Question 4.
The components of a solution (say sugar in water) can be separated by
(a) filtration
(b) evaporation
(c) sedimentation
(d) decantation
Answer:
(b) evaporation
Question 5.
Sand from water is separated by
(a) Sieving
(b) evaporation
(c) filtration
(d) sedimentation and decantation
Answer:
(d) sedimentation and decantation
Question 6.
The process of conversion of water vapours into liquid is called
(a) condensation
(b) decantation
(c) sedimentation
(d) evaporation
Answer:
(a) condensation
Question 7.
The process of conversion of water into its vapours is called
(a) evaporation
(b) condensation
(c) guttation
(d) transpiration
Answer:
(a) evaporation
Question 8.
Paheli bought some vegetables such as french beans, lady’s finger, green chillies, brinjals and
potatoes all mixed in a bag. Which of the following methods of separation would be most
appropriate for her to separate them? (NCERT Exemplar]
(a) Winnowing
(b) Sieving
(c) Threshing
(d) Handpicking
Answer:
(d) Handpicking
Question 9.
Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with
less fat content. Which of the following methods would be most appropriate for Boojho to
prepare it? (NCERT Exemplar)
(a) Filtration
(b) Decantation
(c) Churning
(d) Winnowing
Answer:
(c) Churning
Question 10.
Which of the following mixtures would you be able to separate using the method of
filtration? (NCERT Exemplar)
(a) Oil in water
(b) Cornflakes in milk
(c) Salt in water
(d) Sugar in milk
Answer:
(b) Cornflakes in milk
Question 11.
Which amongst the following methods would be most appropriate to separate grains from
bundles of stalks? (NCERT Exemplar)
(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Threshing
Answer:
(d) Threshing
Question 12.
Four mixtures are given below:
(i) Kidney beans and chick peas
(ii) Pulses and rice
(iii) Rice flakes and corn
(iv) Potato wafers and biscuits
Which of these can be separated by the method of winnowing? (NCERT Exemplar)
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)
Answer:
(b) (ii) and (iii)
Question 13.
While preparing chapatis, Chinky found that the flour to be used was mixed with wheat
grains. Which out of the following is the most suitable method to separate the grains from the
flour? (NCERT Exemplar)
(a) Threshing
(b) Sieving
(c) Winnowing
(d) Filtration
Answer:
(b) Sieving
Question 14.
You might have observed the preparation of ghee from butter> and cream at home. Which
method(s) can be used to separate ghee from the residue? (NCERT Exemplar)
(i) Evaporation
(ii) Decantation
(iii) Filtration
(iv) Churning
Which of the following combination is the correct, answer?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iv) only
Answer:
(b) (ii) and (iii)
2. Fill in the blanks with appropriate words:
1. Peanuts are separated from a mixture of wheat and peanut by ____________
Answer:
handpicking
2. ____________ is used to separate husk from wheat.
Answer:
Winnowing
3. Fine sand can be separated from larger particles by ____________
Answer:
sieving
4. Glass is a ____________
Answer:
mixture
5. Compounds have ____________ melting points.
Answer:
fixed
6. Milk has a ____________ boiling point.
Answer:
variable
7. Boiling point of pure water is ____________ than that of impure water.
Answer:
less
8. Mixture may be solid, liquid or ____________
Answer:
gas
3. State whether the statements given below are True or False:
(i) Butter is separated from butter milk by churning.
Answer:
True
(ii) Separation of components of a mixture is a useful process.
Answer:
True
(iii) Ink loses its properties when mixed in water
Answer:
False
(iv) ‘Sharbat’ is a mixture of sugar and water.
Answer:
True
(v) Rocks are pure substances.
Answer:
False
(vi) Milk is a mixture.
Answer:
True
(vii) Common salt is a pure substance.
Answer:
True
(viii) Mixture has properties different from its components.
Answer:
True
4. Match the following items given in Column A with that in Column B:
Question 1.
Column A Column B
(a) Handpicking (i) Conversion of water vapours into liquids
(b) Threshing (ii) Separating fine particles from flour
(c) Winnowing (iii) Separating larger size impurities
(d) Sieving (iv) Separating butter from milk
(e) Sedimentation (v) Conversion of water into its vapours
(f) Evaporation (vi) Separating grains from its stalks
(g) Condensation (vii) Settling of heavier components at bottom
(h) Churning (viii) Separation by wind or by blowing air
Answer:
Column A Column B
(a) Handpicking (iv) Separating larger size impurities
(b) Threshing (vi) Separating grains from its stalks
(c) Winnowing (viii) Separation by wind or by blowing air
(d) Sieving (ii) Separating fine particles from flour
(e) Sedimentation (vii) Settling of heavier components at bottom
(f) Evaporation (v) Conversion of water into its vapours
Column A (i) Conversion of water vapours into liquids
(a) Handpicking (iv) Separating butter from milk
