National Science Olympiad Forum By SOF Olympiad Trainer - Page 620

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
All of these

Ans 2:

Class : Class 7
D is correct

Ans 3:

Class : Class 9
D

Ans 4:

Class : Class 3
all of these

Ans 5:

Class : Class 2
Fruits (2) contain minerals and vitamins and are protective food. They help in recovering from illness. Overeating of fried food (1) leads to obesity as it contains fat that gets stored in the body. Chocolates (3) contain a lot of carbohydrates which give us energy when hungry.

Ans 6:

Class : Class 5
Everyone thinks that a option is correct but it is wrong.The correct answer is d part.Everyone will think that chocolate is junk food.How can it give us the energy but chocolate contains fat.That's why when when we are hungry it gives us a lot of energy

Ans 7:

Class : Class 7
A is not correct D is correct

Ans 8:

Class : Class 9
A

Ans 9:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 10:

Class : Class 8
all of these option(D)

Ans 11:

Class : Class 6
D

Ans 12:

Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
I think D is the correct answer

Ans 2:

Class : Class 10

Ans 3:

Class : Class 9
d

Ans 4:

Class : Class 7

Ans 5:

Class : Class 9
I do agree it's D

Ans 6:

Class : Class 7
c should be the correct answer

Ans 7:

Class : Class 9

Ans 8:

Class : Class 8
Definitely D

Ans 9:

Class : Class 9
D

Ans 10:

Class : Class 10
The amount of water also matters right

Ans 11:

Class : Class 7
i think amount of water also nedd

Ans 12:

Class : Class 10

Ans 13:

Class : Class 6

Ans 14:

Class : Class 7
I feel that it is D

Ans 15:

Class : Class 8

Ans 16:

Class : Class 8
D

Ans 17:

Class : Class 8

Ans 18:

Class : Class 7
D, amount of water matters the most out of all.

Ans 19:

Class : Class 4
Water is also correct

Ans 20:

Class : Class 7
All the given factors are required for a fair test ; So option D would be the correct answer

Ans 21:

Class : Class 8
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 22:

Class : Class 8
Option D is the correct answer

Ans 23:

Class : Class 5

Ans 24:

Class : Class 8
d is correct answer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
a is the correct answer because chemical composition dose not change

Ans 2:

Class : Class 6
C because we can get clay back from a wet pot by smashing it,but once it heats up, it dries the clay and makes it stone hard.

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
Yes ,Because chemical means change in the properties but there is no change .The answer is A

Ans 5:

Class : Class 7

Ans 6:

Class : Class 5

Ans 7:

Class : Class 6
It should be A

Ans 8:

Class : Class 7
c is the correct answer

Ans 9:

Class : Class 6
on heating, the clay pot doesn't turn into stone,right?it doesn't change composition once heated , it is still clay ! answer is "A"

Ans 10:

Class : Class 6
A is the correct answer

Ans 11:

Class : Class 8
answer is a

Ans 12:

Class : Class 7
A is correct because it just turns hard but it is still clay only.And also chemical change doesn't mean that it is irreversible,Chemical change means that the identity of the substance we started with is lost.Here the identity is not lost.So A is correct.

Ans 13:

Class : Class 6
It really should be A

Ans 14:

Class : Class 6
The answer is A.

Ans 15:

Class : Class 6
IF WE SHARP A PENCIL IT IS A PHYSICAL IRREVERSIBLE CHANGE .SO,IF WE HEAT A POT IS PHYSICAL IRREVERSIBLE CHANGE. BUT IT COULD HAPPEN THAT THE COMPOSITION OF CLAY MIGHT CHANE BECAUSE OF HEATING AS THE MOLECULES STICK TO EACH OTHER

Ans 16:

Class : Class 9
C,because- it is a chemical change. after baking we can break it into smaller particles but it won't form the same clay, with same properties again

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
ans is option C

Ans 2:

Class : Class 8

Ans 3:

Class : Class 7
Option D is correct. I dont know why. Please explain

Ans 4:

Class : Class 7
answer is option c

Ans 5:

Class : Class 8
ans is option C

Ans 6:

Class : Class 9
can someone explain why?

Ans 7:

Class : Class 7
Please explain it to me.

Ans 8:

Class : Class 8

Ans 9:

Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
jk kj;

Ans 2:

Class : Class 5
Not kerwa its kewra. It is an extract that is distilled from the flower of the Pandanus plant. Kewra water is very similar to rosewater. It is used to flavour South Asian cuisine.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
As it goes up,kinetic energy decreases due to gravity while potential energy increases with height. As it comes down, kinetic energy increases due to gravity while potential energy decreases.

Ans 2:

Class : Class 6
it will be maximum near the ground

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
it will be maximum near the ground

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Subject :NSO    Class : Class 7

Saurabh burned two different fibres X and Y in order to identify them. X smelt like burning paper while Y smelt like burning hair. Which of the following options correctly identifies the two fibres?


Ans 1:

Class : Class 7

Ans 2:

Class : Class 10

Ans 3: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
ans is d

Ans 2:

Class : Class 3
answer is B as given in the answers. there is a solution too

Ans 3:

Class : Class 6
D is the ans as air is matter and is very transparent.

Ans 4:

Class : Class 6
The answer is wrong. The correct answer is D

Ans 5:

Class : Class 7
And is b

Ans 6:

Class : Class 4
its got to be ddddd!!

Ans 7:

Class : Class 7
Answer is d

Ans 8:

Class : Class 9
What in the freaking world . I am surprised that these dumb idiots can even host international and national olympiads . Even a 5 year old could get the answer right . I won't be surprised if they give the answer 22 of the question 2 2 . I am telling you we are wasting money on these damn question papers

Ans 9:

Class : Class 7
@ashwak control your language

Ans 10:

Class : Class 7

Ans 11:

Class : Class 6
sof the answer is ddd so many times i am really fed up of your wrong answers and that is really very shamful on you.

Ans 12:

Class : Class 6
Answer is D as air it neither absorbs or reflects light,its almost transparent,it transmits the whole of light.

Ans 13:

Class : Class 7
The answer is 'D' option, 'All of the above'. It is so because Air is not visible because it neither absorbs nor reflects light, it transmits whole of light. Dust particles in air is visible as they reflect light. Air is almost transparent substance. It is not dust to be visibile. It is air, it is completely transparent.

Ans 14:

Class : Class 8
i agree with d

Ans 15:

Class : Class 7
d is the answer but the trainer is showing b as answer air reflects light that is why the sky is blue

Ans 16:

Class : Class 7
ans is d

Ans 17:

Class : Class 8
D

Ans 18:

Class : Class 6
d is the ans

Ans 19:

Class : Class 9
Answer is D

Ans 20:

Class : Class 10
these days sof olympiad trainer has gone mad. in one test, i got 4 perfectly wrong question . and now this . this adds up to fivei do not know what is the problemans should be ddddddddd!!!!!

Ans 21:

Class : Class 6
its D come on two total mistakes in one test

Ans 22:

Class : Class 6
I agree with everyone is Satwik because air trasparent it neither reflects nor absorbs light and trasmits whole of light So ans is D

Ans 23:

Class : Class 6
ANS IS D

Ans 24:

Class : Class 6
ans is d because it is transparent which allows light to pass, it doesn't observe light but transmits all light

Ans 25:

Class : Class 6
ANS IS D

Ans 26:

Class : Class 7
It should be d but they are telling its b.

Ans 27:

Class : Class 4
Option D. All of the above.

Ans 28:

Class : Class 6
THE ANSWER IS D

Ans 29:

Class : Class 9
Answer is D

Ans 30: (Master Answer)

Class : Class 1

Ans 31:

Class : Class 10
Ans is D as air is all of the above

Ans 32:

Class : Class 9
The correct answer should be option D, All of these

Ans 33:

Class : Class 7
D

Ans 34:

Class : Class 7

Ans 35:

Class : Class 4
Option D. All of the above.

Ans 36:

Class : Class 6
ans is D

Ans 37:

Class : Class 6
ans is d

Ans 38:

Class : Class 7
CHILL PPL CHILL

Ans 39:

Class : Class 6
i mean except Satwik

Ans 40:

Class : Class 6
I should be d

Ans 41:

Class : Class 7

Ans 42:

Class : Class 9
I think its D not B

Ans 43:

Class : Class 3
ans is d sof !!!!!!!!!!!!! ans is d

Ans 44:

Class : Class 7
ans is d

Ans 45:

Class : Class 6
It is true that air is a perfectly transparent object. It neither absorbs nor reflects light. It transmits whole of light. So, all the options are correct and answer is D.

Ans 46:

Class : Class 4
ANS IS D

Ans 47:

Class : Class 9
Explain this dumb question and an even dumber answer " Master Answer"

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
The common error is to think that pressure at 0.4h above the surface of the reservoir of mercury is 0.4 times the atmospheric pressure. The pressure at p is caused by the weight of mercury above point P. Thus preesure at P is equal to : 0.6x 100000 = 60000 Pa

Ans 2:

Class : Class 7
answer is b

Ans 3:

Class : Class 8

Ans 4:

Class : Class 7
everybody just copy and paste it, can anyone explain in an easier way

Ans 5:

Class : Class 9

Ans 6:

Class : Class 8

Ans 7: (Master Answer)

Class : Class 1
The correct answer is B.

Ans 8:

Class : Class 9

Ans 9:

Class : Class 9

Post Your Answer

X Y
(A) Wool Silk
(B) Cotton Rayon
(C) Cotton Silk
(D) Silk Wool