National Science Olympiad Forum By SOF Olympiad Trainer - Page 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

Refer to the given pie chart showing nutrients P, Q, R and S present in different foods and identify the correct statements regarding them.

(i) Food rich in P is taken by sportspersons which provides them with instant energy and it turns blue-black in colour on adding iodine solution.
(ii) S helps in retaining water in the body and maintains healthy bowel movement.
(iii) S is important for growth and repair of body tissues thus, required in more amount in person recovering from accident injuries.
(iv) R forms antibodies in the body and its deficiency causes marasmus characterised by dry and rough hair, swollen stomach and mental retardation in children.
(v) Food sample containing Q turns into purple or violet colour when treated with 2 drops of copper sulphate and sodium hydroxide solution.

A(i), (iii) and (iv) only
B(ii), (iii), (iv) and (v) only
C(i), (ii) and (v) only
D(ii), (iii) and (iv) only


Ans 1:

Class : Class 6
Option C

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 6

Read the given statements regarding friction and select the correct ones.
(i) Friction may cause moving objects to slow down.
(ii) A rough surface offers greater friction than a smooth surface.
(iii) Friction makes it easy to slide heavy objects across the floor.
(iv) Friction always acts in the opposite direction of motion of objects.

A (i), (ii) and (iv) only
B (ii) and (iv) only
C (i) and (ii) only
D (iii) and (iv) only


No it is wrong because friction always acts opposite of motion

Ans 1:

Class : Class 6
Option A

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 6

Consider a 3 V cell, it is connected across two uniform resistance wires PQ and RS of resistance 1 Ω and 2 Ω respectively. Length of PQ is 3 cm and length of RS is 6 cm.

A voltmeter with one end fixed at point P and the other end connected to a jockey (J) slides from point R to point S. Which of the following diagrams represents reading of the voltmeter (V) as the jockey (J) slides? (x is the length from R to J.) (A voltmeter measures voltage and it allows almost no current to pass through it.)

A
B
C
D


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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
The answer is D

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