National Science Olympiad Forum By SOF Olympiad Trainer - Page 621

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8

Ans 2:

Class : Class 3
Correct answer is D

Ans 3:

Class : Class 6
You are right. It should be D.

Ans 4:

Class : Class 9
You are wrong.The correct answer should be D.

Ans 5:

Class : Class 3
I think you are right it should be D.

Ans 6:

Class : Class 9
the correct is D.

Ans 7:

Class : Class 9
d is the answer

Ans 8:

Class : Class 8
d

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
I agree Areen

Ans 2:

Class : Class 6
Ans is A because bituminous is not an ore, typhoid is not a vector-borne disease and nutcracker is not a class 1 lever.

Ans 3:

Class : Class 5

Ans 4:

Class : Class 9
The correct answer is A because Bituminous is not a ore, typhoid is a water-borne disease and rest are vector-borne disease and nutcracker is an example of 2nd class lever whereas all the other are 1st class lever.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
the answer is b . this is because sun tan is temporary.

Ans 2:

Class : Class 9
answer is b

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
How is this possible Nylon burns with smell of hair???

Ans 2:

Class : Class 8
Nylon should neither have a smell of burning hair nor the smell of burning paper. Nylon has a celery or plastic-like cell. Hence the correct answer is D. But on the other hand when acrylic burns, it shrinks and converts into black beads. On this contrast, the correct answer will be B with respect to acrylic and D with respect to Nylon. There is definitely an error in the options of the answers!

Ans 3:

Class : Class 10

Ans 4:

Class : Class 9
IT must be D! Nylon does not burn with the smell of burning hair as it is purely synthetic and has no relation to the protein based hair.

Ans 5:

Class : Class 9
nylon burns with a smell of plastic, not burning hair. WTF?

Ans 6:

Class : Class 8
Nylon does not have the smell of burning hair. So the answer should be d.

Ans 7:

Class : Class 8
Correct answer is A

Ans 8:

Class : Class 9
How can Nylon burn with the smell of burning hair??

Ans 9:

Class : Class 8
IT SHOU BE D!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 10:

Class : Class 8
(D)

Ans 11:

Class : Class 9
Supposed to be D

Ans 12:

Class : Class 9
yes the answer is D. nylon burns with a smell of celery because its a synthetic fibre.

Ans 13:

Class : Class 9
wrong answerthe answer should be B

Ans 14:

Class : Class 8
wool burns with smell of burning hair

Ans 15:

Class : Class 8
It should be D. Because nylon would never once burn with smell of paper in it's entire career. SOF, you gotta chnage the answer man.

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
THERE IS NO SOLUTION SOB HOW CAN WE UNDERSTAND

Ans 2:

Class : Class 8
There is no explanation for the answer. How do we understand Sof?

Ans 3:

Class : Class 4

Ans 4:

Class : Class 4

Ans 5:

Class : Class 8
I think c

Ans 6:

Class : Class 9

Ans 7:

Class : Class 9

Ans 8:

Class : Class 8
There is no explanation for the answer. How do we understand sof?

Ans 9:

Class : Class 5
But they are telling that the right answer is option d

Ans 10:

Class : Class 8

Ans 11:

Class : Class 4

Ans 12:

Class : Class 4
There is no explanation for the answer. How do we understand sof?

Ans 13:

Class : Class 4

Ans 14:

Class : Class 4
Air always act as Frictional force against Gravity Hence ans is B in this case

Ans 15:

Class : Class 9

Ans 16:

Class : Class 4
qwertyuiopasdfghjkkklzxcvbnm

Ans 17:

Class : Class 4
qwertyuiopasdfghjklzxcvbnm,.-/:;(â1

Ans 18:

Class : Class 8
Yea, pls explain this question to us SOF admin

Ans 19:

Class : Class 9

Ans 20:

Class : Class 4
@ishi gupta i know this is irrevelent but its not sob its sof

Ans 21:

Class : Class 9
there is air friction against gravity. so answer is B

Ans 22:

Class : Class 10
Kqwertyuiopasdfghjklzxcvbnm,.-/:;(₹

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Answer is A

Ans 2:

Class : Class 7
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Ans 3:

Class : Class 6
Admin please tell me ,how is escalator a pulley?

Ans 4:

Class : Class 5
A

Ans 5:

Class : Class 4
l

Ans 6:

Class : Class 6

Ans 7:

Class : Class 5
AAAAAAAAAAAAAAAAA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 8:

Class : Class 9
why not B all the options are levers

Ans 9:

Class : Class 7
I

Ans 10:

Class : Class 5
A

Ans 11:

Class : Class 9
the answer is A

Ans 12:

Class : Class 5
The answer could be both A or B because wheel barrows and screwdrivers are levers and wheel and axles

Ans 13:

Class : Class 7

Ans 14:

Class : Class 5
Answer is A

Ans 15:

Class : Class 6
A

Ans 16:

Class : Class 5
Yes

Ans 17:

Class : Class 5

Ans 18:

Class : Class 6
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
It should be option A- Only 1 As water is liquid, the only change that can be seen is that of the change in shape. it volume will remain the same

Ans 2:

Class : Class 9
A

Ans 3:

Class : Class 9
The answer must be the option "A", as it states so "Farheen filled container X with 100 ml of water." Container Y had just a different shape, and it was also broader, so how can it be the option "C"?

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 9
the sum of digits of the numbers in option a,b,d comes to 29. whereas in case of option c the total is 27.hence C is the correct answerwh

Ans 3:

Class : Class 6
solution pls

Ans 4:

Class : Class 8

Ans 5:

Class : Class 9
Thank you Sanvi

Ans 6:

Class : Class 6

Ans 7:

Class : Class 9
Thank you for the solution saanvi

Ans 8:

Class : Class 8
i really can't understand.

Ans 9:

Class : Class 6

Ans 10:

Class : Class 5
i dont know

Ans 11:

Class : Class 9
I can not understand.

Ans 12:

Class : Class 7
Thanks Sanvi

Ans 13:

Class : Class 7
what is this?

Ans 14:

Class : Class 7
Thank you saanvi

Ans 15:

Class : Class 8
Thanks for the solution saanvi

Ans 16:

Class : Class 7
Yes, Saanvi u r right...Thanks Anamkhan

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