TNPSC Model Test Questions and Answers-Science Quiz-Series 2

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