National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 6

Study the given Venn diagram.

Following statements represent the causes of different kinds of pollution. Which of the following statements hold true for the given Venn diagram?
(i) Factory discharge coming out of a chimney can be included in R.
(ii) Construction work going on at a building site can be included in Q.
(iii) Pesticide spray in fields and youngsters dancing in a disco can be included in O.
(iv) Vehicles moving on roads can be included in O.


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


Is statement II can cause water pollution? How?

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
The answer for the above question is C How is it possible?? Why is the answer not D??

Ans 3:

Class : Class 8
The strength of a magnet is always stronger at its poles and not at the middle, so if we suppose Q as a bar magnet it will be wrong as it is written that in diagram 1 the strength of attraction is more but Qis attracting P from middle, so it is wrong

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
A.Butterfly

Ans 2:

Class : Class 3
butterfly

Ans 3:

Class : Class 10
A. Butterfly. To grow into an adult butterflies go through 4 stages: egg, larva, pupa and adult. They have 6 legs

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
the answer is at B Petroleum Conservation Research Association

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
higher is the answer

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :NSO    Class : Class 3

The temperature changes in a kettle of water was recorded for 14 minutes and represented in the graph as shown.

Which of the following statements is/are true?
1. The water in the kettle was initially in the liquid state.
2. There was less water in the kettle at point 'e' than at point 'a'.
3. The water took 6 minutes to reach its boiling point after it was heated.
4. The kettle of water was heated for 6 minutes.

A 1 and 2
B 1 and 3
C 1, 2 and 3
D 1, 3 and 4


pl explain

Ans 1:

Class : Class 10
A. 1 and 2 Point 1 is correct and simple to understand. Point 2 is correct because some water would have evaporated after it reached boiling point. Point 3 is incorrect because the heating started at 3 and it reached boiling point at 6. So it took 3 minutes to reach boiling point. Point 4 is incorrect because as per the graph water was heated from point 3 till point 11 i.e. for 8 minutes.

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
in ans sheet ans. is a

Ans 2:

Class : Class 6
The distance of the image in the mirror s the same as it is in reality.So Sachin is sitting 3 meters away from the mirror and the image is forming 7 meters away from the mirror . Then 3 meters 4 meters= 7 meters and the image will be formed 14 meters away from the object.

Ans 3:

Class : Class 7
he is sitting 3cm in FRONT of the mirror. the letters appear 7M IN FRONT of him. now, 7-3=4. so if the distance BETWEEN MIRROR AND IMAGE is 4m. this means that the distance BETWEEN AND REAL OBJECT is also 4m. Sachin is sitting 3cm in front of the mirror, so 4-3=1m. thus the answer is a

Ans 4:

Class : Class 5

Ans 5:

Class : Class 7
Please draw the diagram first. You will find the answer. When the image is 7 m infront of him, means the image is at 4m from the mirror on its back and the thus the object will be at the 4 m infront of the mirror, which is 1 m behind him.

Ans 6:

Class : Class 7
The answer is (A) I m behind him.

Post Your Answer