National Science Olympiad Forum By SOF Olympiad Trainer - Page 570

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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
answer is b

Ans 2:

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

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
(D)

Ans 2:

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

Ans 3:

Class : Class 8
wool burns with smell of burning hair

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 9
wrong answerthe answer should be B

Ans 7:

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

Ans 8:

Class : Class 9
Supposed to be D

Ans 9:

Class : Class 10

Ans 10:

Class : Class 8
Correct answer is A

Ans 11:

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 12:

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

Ans 13:

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

Ans 14:

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 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

Ans 2:

Class : Class 4

Ans 3:

Class : Class 8

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 7
There is no explanation for the answer. How do we understand Sof?

Ans 7:

Class : Class 7
There is no explanation for the answer. How do we understand sof?

Ans 8:

Class : Class 4

Ans 9:

Class : Class 4
qwertyuiopasdfghjkkklzxcvbnm

Ans 10:

Class : Class 9

Ans 11:

Class : Class 4

Ans 12:

Class : Class 9

Ans 13:

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

Ans 14:

Class : Class 9

Ans 15:

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

Ans 16:

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

Ans 17:

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

Ans 18:

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

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 8
I think c

Ans 22:

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

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Yes

Ans 2:

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

Ans 3:

Class : Class 4
l

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7
I

Ans 6:

Class : Class 5
Answer is A

Ans 7:

Class : Class 9
the answer is A

Ans 8:

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

Ans 9:

Class : Class 5
A

Ans 10:

Class : Class 6
A

Ans 11:

Class : Class 7
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Ans 12:

Class : Class 5
Answer is A

Ans 13:

Class : Class 5

Ans 14:

Class : Class 5
A

Ans 15:

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

Ans 16:

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

Ans 17:

Class : Class 6
A

Ans 18:

Class : Class 6

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Subject :NSO    Class : Class 5

Ans 1:

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"?

Ans 2:

Class : Class 9
A

Ans 3:

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

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Thanks Sanvi

Ans 2:

Class : Class 9
Thank you for the solution saanvi

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6

Ans 5:

Class : Class 9
Thank you Sanvi

Ans 6:

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 7:

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

Ans 8:

Class : Class 8
i really can't understand.

Ans 9:

Class : Class 5
i dont know

Ans 10:

Class : Class 6
solution pls

Ans 11:

Class : Class 8
Thanks for the solution saanvi

Ans 12:

Class : Class 8

Ans 13:

Class : Class 6

Ans 14:

Class : Class 7
what is this?

Ans 15:

Class : Class 9
I can not understand.

Ans 16:

Class : Class 7
Thank you saanvi

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 10
Can you explain

Ans 3:

Class : Class 5
can you please explain me

Ans 4:

Class : Class 4
Can you please explain

Ans 5:

Class : Class 2
ans is c

Ans 6:

Class : Class 9
U gotta explain this... d is also correct

Ans 7:

Class : Class 6
Option C) as it ask that what is the heart beat just stop so it means That in this point of time the heart beat is gonna decrease.

Ans 8:

Class : Class 7
every question is fake without solution including this one

Ans 9:

Class : Class 5

Ans 10:

Class : Class 5
bruh, ques 12

Ans 11:

Class : Class 5
Areem is correct

Ans 12:

Class : Class 7
Areen is correct but I ticked d so I got it wrong

Ans 13:

Class : Class 5

Ans 14:

Class : Class 5
very silly question! haaaaaah

Ans 15:

Class : Class 4

Ans 16:

Class : Class 5

Ans 17:

Class : Class 6
Ans is B because as in the line graph the number of heartbeats decreased in the line RS.

Ans 18:

Class : Class 9
I ticked D by mistake 🙄

Ans 19:

Class : Class 7
its D

Ans 20:

Class : Class 7

Ans 21:

Class : Class 7
When we stop exercise in heart rate decreases So in the graph it will be a decline in the line so option is B

Ans 22:

Class : Class 1
Can u please explain

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