National Science Olympiad Forum By SOF Olympiad Trainer - Page 654

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
It should be D

Ans 2:

Class : Class 1
D HE GAVE EXPLANATION

Ans 3:

Class : Class 9

Ans 4:

Class : Class 3
NA

Ans 5:

Class : Class 7

Ans 6:

Class : Class 4
c maybe????

Ans 7:

Class : Class 9
c is the ans

Ans 8:

Class : Class 9
kunal is wrong

Ans 9:

Class : Class 3

Ans 10:

Class : Class 3
ahh... very easy answer is d

Ans 11:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 12:

Class : Class 3
D

Ans 13:

Class : Class 9
C

Ans 14:

Class : Class 2

Ans 15:

Class : Class 3

Ans 16:

Class : Class 3
c is the correct answer

Ans 17:

Class : Class 5
abcd are correct

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 2:

Class : Class 6
D

Ans 3:

Class : Class 7
D is correct

Ans 4:

Class : Class 6
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 9
A

Ans 7:

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 8:

Class : Class 3
all of these

Ans 9:

Class : Class 5

Ans 10:

Class : Class 7
A is not correct D is correct

Ans 11:

Class : Class 9
D

Ans 12:

Class : Class 8
all of these option(D)

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Definitely D

Ans 2:

Class : Class 9
D

Ans 3:

Class : Class 10

Ans 4:

Class : Class 6

Ans 5:

Class : Class 7

Ans 6:

Class : Class 8
Option D is the correct answer

Ans 7:

Class : Class 9
I think D is the correct answer

Ans 8:

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

Ans 9:

Class : Class 8

Ans 10:

Class : Class 7
c should be the correct answer

Ans 11:

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

Ans 12:

Class : Class 9
d

Ans 13:

Class : Class 5

Ans 14:

Class : Class 8
D

Ans 15:

Class : Class 10

Ans 16:

Class : Class 9
I do agree it's D

Ans 17:

Class : Class 7
i think amount of water also nedd

Ans 18:

Class : Class 7
I feel that it is D

Ans 19:

Class : Class 8
d is correct answer

Ans 20:

Class : Class 8

Ans 21:

Class : Class 9

Ans 22:

Class : Class 10
The amount of water also matters right

Ans 23:

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 24:

Class : Class 4
Water is also correct

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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
A is the correct answer

Ans 3:

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 4:

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

Ans 5:

Class : Class 8
answer is a

Ans 6:

Class : Class 7

Ans 7:

Class : Class 6
It really should be A

Ans 8:

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 9:

Class : Class 5

Ans 10:

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 11:

Class : Class 6
The answer is A.

Ans 12:

Class : Class 7
c is the correct answer

Ans 13:

Class : Class 6
It should be A

Ans 14:

Class : Class 6

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

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
answer is option c

Ans 2:

Class : Class 8
ans is option C

Ans 3:

Class : Class 8

Ans 4:

Class : Class 9
can someone explain why?

Ans 5:

Class : Class 8
Option D is correct. I dont know why. Please explain

Ans 6:

Class : Class 8

Ans 7:

Class : Class 7

Ans 8:

Class : Class 9
ans is option C

Ans 9:

Class : Class 7
Please explain it to me.

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Subject :NSO    Class : Class 4

Ans 1:

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.

Ans 2:

Class : Class 5
jk kj;

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
it will be maximum near the ground

Ans 2:

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.

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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: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
THE CORRECT ANS IS OPTION C

Ans 4:

Class : Class 10

Post Your Answer

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