6th
Standard Science-Series 2
1. Handpicking is a
method of separating substances, based on
a. Size
b. Colour
c. shape
d. All the above
Answer: D
2. Solid mixtures are
separated by
1. Hand Picking
2. Winnowing
3. Sieving
4. Magnetic separation
5. Sedimentation
Codes
a. 1, 2, 3 and 4 only
b. 2, 3, 4 and 5 only
c. 1, 3, 4 and 5 only
d. 1, 3 and 4 only
Answer: A
3. Vegetables are
separated by
a. Hand Picking
b. Winnowing
c. Sieving
d. Magnetic separation
Answer: A
4.
Statements
Assertion:
Farmers allow the mixture of grain and husk to fall from the height when wind
flows
Reason:
The method of separating lighter particles from heavier particles with the help
of wind is called winnowing
a. Both Assertion and Reason are
correct and Reason is the Correct Explanation to Assertion
b. Both Assertion and Reason are
correct BUT Reason is not the Correct Explanation to Assertion
c. Assertion is true Reason is false
d. Assertion is false Reason is true
Answer:
A
5.
The method of separating lighter particles from heavier particles with the help
of wind is called
a. natural fall
b. Winnowing
c. Sieving
d. Wind separation
Answer: B
6. By which method of
separation is used when the components of mixture has different sizes
a. natural fall
b. Winnowing
c. Sieving
d. Wind separation
Answer: C
7. Which method is used
to separate particles when the components attracted by magnet
1 Winnowing
2. Sieving
3.
Magnetic separation
Codes:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 3 only
Answer:
D
8.
Which of the following two components use similar separation method?
1 Paddy and Chaff
2. Ragi and Pulses
3.
Sand and stone
4. Rava and Iron particles
Codes:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 3 and 4 only
Answer:
B
9.
Insoluble solids from liquids are separated by the methods of
1. Sedimentation
2. Decantation
3.
Filtration
Codes:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2 and 3 only
Answer:
D
10.
In which order, the insoluble solids are separated from liquids are
1. Sedimentation
2. Decantation
3.
Filtration
Codes:
a. 1, 2 and 3
b. 2, 3 and 1
c. 3, 2, and 1
d. 1, 3 and 2
Answer:
A
11.
What is/are the methods used to separate solid substances from liquid
a. Evaporation
b. Condensation
c. Both a and b
d. Filtration
Answer:
C
12.
One litre of sea water contains about
a. 35 gram of salt
b. 3.5 gram of salt
c. 350 gram of salt
d. 0.35 gram of salt
Answer:
B
13.
Common salt contains
a. More than 50 minerals
b. 40 -50 minerals
c. 30-40 minerals
d. 20-30 minerals
Answer: A
14. Crude oil is a
mixture of petrol, kerosene and naphtha like
a. 56 minerals
b. 66 minerals
c. 76 minerals
d. 86 minerals
Answer:
D
15.
Suitable method to separate lighter impurities from mixture is
a. Hand picking
b. Winnowing
c. Evaporation
d. Magnetic separation
Answer:
A
16. The method used to
separate the seeds from the fruit juice is
a. Sieving
b. Winnowing
c. Filtration
d. Crystallization
Answer:
C
17.
Separation of common salt from sea water is by
a. Evaporation
b. Winnowing
c. Filtration
d. Sieving
Answer:
A
18.
Find out the odd man out
a. Hand picking
b. Evaporation
c. Winnowing
d. Sieving
Answer:
B
19.
Find out the odd man out
a. Filtration
b. Sedimentation
c. Decantation
d. Condensation
Answer:
D
20.
Why do one needs to use different methods of separation?
1. To remove the unwanted substances
2. To remove substances which are
harmful to our body
3.
To obtain the substances which are useful to us in a pure state
Codes:
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. All the above
Answer:
D
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