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 8
The answer is C

Ans 2:

Class : Class 8
Because making of milk to curd is a chemical change and not physical change as :- A new substance is formed, It is irreversible and permanent, It's chemical components are changed, There is energy loss while making it.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
The answer is C as it is the only option that somehow results in repulsion while others don't.

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
Ans B should be the correct answer. Magnet may rotate or may not it will depend upon which pole is close to the other magnet

Ans 4:

Class : Class 8
no', the ans. should be d

Ans 5:

Class : Class 7

Ans 6:

Class : Class 9
The option C indicates repulsion.

Ans 7:

Class : Class 6
FIRST I ALSO DO SAME OPTION THEN I UNDERSTAND THAT IF WE BRING BAR MAGNET NEAR TO IT TO PROVE THAT THIS IS A MAGNET IT WILL ALSO SHOW SOME REPULSION OR ATTRACTION SO THIS IS THE REASON IT ROTATES

Ans 8:

Class : Class 4
Ans.c as even a magnetic material will attract the compass needle. Only a magnet will repel another magnet and rotate before being attracted to the other magnet.

Ans 9:

Class : Class 7
The option should be the correct one as the magnet may not rotate due to opposite poles of the magnets. So , it is not necessary for it to rotate in all conditions. So, I think option B is the appropriate answer.

Ans 10:

Class : Class 8
Only a magnet can attract a compass needle. A magnetic material cannot attract it. Then why not B?

Ans 11:

Class : Class 7

Ans 12:

Class : Class 5
Option B is the answer, because if magnet is brought close to the compass, the needle points towards the magnet.

Ans 13:

Class : Class 7
d

Ans 14:

Class : Class 7
sorry c is correct

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
Yes, it is.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 6
Hey Sonia, Shadow P will be formed in the morning and not R.Shadow will be formed in the opposite direction of Sun.

Ans 3:

Class : Class 3
shadow Q in picture is not right.it is near to noon.so shadow should be smaller.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
OPTION C IS THE FOOT OF A HEN.

Ans 2:

Class : Class 7
obviously option C

Ans 3:

Class : Class 5
option c

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
I guess b since H2 can be obtained

Ans 2:

Class : Class 8
D

Ans 3:

Class : Class 9
it should be A

Ans 4:

Class : Class 9
correct answer (A). natural gas is a clean fuel.

Ans 5:

Class : Class 9
A

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9

Ans 2:

Class : Class 9
black vessel will radiate more heat and cannot retain heat of water. so answer, is (B)

Ans 3:

Class : Class 9
we know that black absorbs heat but it also radiates heat

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
harry's fastest lap time is 25.3 s the question says if he maintains his average speed of his FASTEST lap time if he completes his fastest lap in 25.3 s, he would complete 100 laps in 25.3 * 100 = approx. 2529 seconds

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