National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Both blocks will fall because there will be nothing to hold them.It is like a sea-saw balanced in the middle.If one person gets up,the other will go down.

Ans 2:

Class : Class 7
c because of gravity 1 will fall. imbalance and so other will also fall

Ans 3:

Class : Class 7
Both of them will fall because box II will come down due to gravity and box I will become heavier

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Subject :NSO    Class : Class 7

Kanav took two test tubes marked as I and II. In test tube I, he put calcium carbonate and hydrochloric acid while in test tube II, he put zinc granules and hydrochloric acid. He passed the gas coming out from both the test tubes in lime water. What would be his observation?


A The gas coming out from test tube I turned lime water milky.
B The gas coming out from test tube II turned lime water milky.
C The gases coming out from both the test tubes turned lime water milky.
D None of these.


it could have been simpler

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8
If it could have been simpler, then you don't have to study for these Olympiads as its too difficult. And I don't think it is very difficult and the option is (A) i think.

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Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
option b is the answer

Ans 2:

Class : Class 7
Answer is B don't look for more information ans is hidden in question with less information also

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Subject :NSO    Class : Class 7

Swati take X fabric and burn it. She observes following properties of the fabric :
(i) It burns but does not melt.
(ii) It shrinks from flame.
(iii) It gives the odour of charred meat while burning.
(iv) It left residue after burning which is black, hollow, irregular bead that can be easily crushed to a gritty black powder.
(v) It is self extinguishing.
According to her observation, X could be

A Silk
B Jute
C Cotton
D Nylon.


Ans 1:

Class : Class 8
It HAS to be silk. Reference: https://www.dharmatrading.com/home/the-fire-test.html

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Subject :NSO    Class : Class 8

Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.
(i) Growing different crops in different seasons in the same field will deplete the nutrients of soil.
(ii) Freshly harvested grains must be dried before sowing.
(iii) Manures are mineral specific as they provide all the minerals needed by plant.
(iv) Broadcasting of seeds is done by seed drill.

(i) (ii) (iii) (iv)
A T F F F
B F T F F
C T T F F
D F T F T


According to me answer show be C

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
Hi bro, it is very easy if you understand it properly. It is just for testing your direction sense.

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
It's (A) as I have done a similar question like this.

Ans 2:

Class : Class 7
Wrong ques ans its 'A'

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