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Fortnightly Sub Test-1A (C-08) Phase-I - Science (16!05!2021)

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16/05/2021 FST-VIII

Phase-I
Code-A

Please submit your test by


clicking on this link:
https://bit.ly/2QkfIdu

Regd. Office : Aakash Tower, 8, Pusa Road, New Delhi-110005


Ph.: 011-47623456

MM :40 Fortnightly Subjective Test-1 Time :1½ Hrs.

Integrated Classroom Course for


Olympiads and Class-VIII (2021-2022)

Topics Covered :
Physics : Force and Pressure (Complete Chapter)
Chemistry : Synthetic Fibres and Plastics: (Chemistry of Fibres and Plastics, Classification of Polymers,
Fibres)
Biology : Crop Production and Management (Complete Chapter)

GENERAL INSTRUCTIONS :

1. All questions are compulsory.


2. The question paper consists of 18 questions divided into three Sections A, B and C.
3. Section A comprises of 10 questions (5 MCQ & 5 VSA type) of 1 mark each, Section B comprises of
5 questions of 3 marks each and Sections C comprises of 3 questions of 5 marks each. There is no
overall choice in the paper. However, internal choice is provided in 2 questions of 3 marks and
1 question of 5 marks.
4. Use of calculator is not permitted.
5. It is mandatory to use Blue/Black Pen to write the answer.

SECTION-A
Multiple Choice Type Questions : [5×1=5]
1. Which of the followings is a contact force? [1]
(1) Magnetic force (2) Gravitational force
(3) Electrostatic force (4) Muscular force
2. A very familiar form of polyester which is used for making bottles and utensils is [1]
(1) Acrylic
(2) PET
(3) Rayon
(4) Nylon

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Class-VIII Fortnightly Subjective Test-1_Science (Code-A)_Phase-I
3. Polywool is a mixture of [1]
(1) Polyester and silk (2) Cotton and wool
(3) Polyester and cotton (4) Polyester and wool

Paragraph Based (Q.4 and Q.5)


Several crops are grown in different seasons. Farmers generally use different physical methods to replenish
the soli nutrients.
4. Farmers generally grow legumes in alternate seasons to replenish the soil with [1]
(1) Oxygen (2) Phosphorus
(3) Nitrogen (4) Carbon
5. Which of the following crops is sown in rainy season? [1]
(1) Soyabean (2) Gram
(3) Pea (4) Mustard

Very Short Answer Type Questions : [5×1=5]


6. What is the main cause of force? [1]
7. What is the unit of force? [1]
8. Name the polymer of [1]
(i) Ethene
(ii) Glucose
9. Write any one property of rayon. [1]
10. Mention any two sources of irrigation. [1]

SECTION-B
Short Answer Type Questions : [5×3=15]
11. Give one example in each of the following cases. [3]
(i) A force stops a moving body.
(ii) A force causes motion of a body.
(iii) A force changes the shape of a body.
12. (i) Define weight of a body. [1]
(ii) Write any two points where weight of the body becomes zero. [2]
13. Write the name of the first fully synthetic fibre and its four properties. [3]
OR
Compare synthetic fibres and natural fibres on the basis of their [3]
(i) Strength
(ii) Fire catching capacity
14. (i) Explain, how does soil become poorer in certain nutrients. [2]
(ii) What is manuring? [1]
15. (i) What is harvesting? How much time is required for a cereal crop to mature? [1]
(ii) What are the names of traditional methods of irrigation in which following systems are used?
(a) Pulley system [1]
(b) Lever system [1]
OR
Give a brief note on plough. [3]
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Fortnightly Subjective Test-1_Science (Code-A)_Phase-I Class-VIII

SECTION-C
Long Answer Type Questions : [3×5=15]
16. (i) Define contact and non-contact forces. [2]
(ii) Define the following forces. [3]
(a) Magnetic force
(b) Gravitational force
(c) Electrostatic force
OR
(i) Calculate the weight of a body having mass 7 kg. [1]
(ii) Define atmospheric pressure. [1]
(iii) Write the relation between pressure and depth variation. [1]
(iv) A 5 kPa pressure is exerted on a cube of area 10 cm2. Calculate the force applied on the cube. [2]
17. (i) Write any two differences between linear polymers and branched chain polymers. [2]
(ii) Define the following:
(a) Petrochemicals [1]
(b) Polymers [1]
(c) Natural fibres [1]
18. (i) Answer the following questions regarding the given figure.

(a) What is the use of the given tool? [1]


(b) Give four advantages of the tool depicted above. [2]
(ii) How is organic manure obtained? [2]

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Edition: 2021-22

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