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
NA

Ans 2:

Class : Class 3
D

Ans 3:

Class : Class 2

Ans 4:

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

Ans 5:

Class : Class 9
c is the ans

Ans 6:

Class : Class 9
kunal is wrong

Ans 7:

Class : Class 3

Ans 8:

Class : Class 4
c maybe????

Ans 9:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 10:

Class : Class 3
c is the correct answer

Ans 11:

Class : Class 5
abcd are correct

Ans 12:

Class : Class 3

Ans 13:

Class : Class 7

Ans 14:

Class : Class 9
C

Ans 15:

Class : Class 1
D HE GAVE EXPLANATION

Ans 16:

Class : Class 3
It should be D

Ans 17:

Class : Class 9

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Subject :NSO    Class : Class 3

Ans 1:

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 2:

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 3:

Class : Class 9
D

Ans 4:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 5:

Class : Class 8
all of these option(D)

Ans 6:

Class : Class 6
D

Ans 7:

Class : Class 6
All of these

Ans 8:

Class : Class 7
D is correct

Ans 9:

Class : Class 9
A

Ans 10:

Class : Class 3
all of these

Ans 11:

Class : Class 7
A is not correct D is correct

Ans 12:

Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
I do agree it's D

Ans 2:

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

Ans 3:

Class : Class 7
c should be the correct answer

Ans 4:

Class : Class 5

Ans 5:

Class : Class 8
Definitely D

Ans 6:

Class : Class 7

Ans 7:

Class : Class 7
i think amount of water also nedd

Ans 8:

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 9:

Class : Class 10

Ans 10:

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

Ans 11:

Class : Class 9
d

Ans 12:

Class : Class 10
The amount of water also matters right

Ans 13:

Class : Class 8

Ans 14:

Class : Class 8

Ans 15:

Class : Class 9

Ans 16:

Class : Class 8
D

Ans 17:

Class : Class 9
I think D is the correct answer

Ans 18:

Class : Class 4
Water is also correct

Ans 19:

Class : Class 10

Ans 20:

Class : Class 6

Ans 21:

Class : Class 7
I feel that it is D

Ans 22:

Class : Class 8
d is correct answer

Ans 23:

Class : Class 8
Option D is the correct answer

Ans 24:

Class : Class 9
D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
It really should be A

Ans 2:

Class : Class 7
c is the correct answer

Ans 3:

Class : Class 8
answer is a

Ans 4:

Class : Class 6

Ans 5:

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

Ans 6:

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

Ans 7:

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 8:

Class : Class 5

Ans 9:

Class : Class 6
A is the correct answer

Ans 10:

Class : Class 6
It should be A

Ans 11:

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 12:

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 13:

Class : Class 7

Ans 14:

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 15:

Class : Class 6
The answer is A.

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 7

Ans 3:

Class : Class 7
Please explain it to me.

Ans 4:

Class : Class 8

Ans 5:

Class : Class 7
answer is option c

Ans 6:

Class : Class 8
ans is option C

Ans 7:

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

Ans 8:

Class : Class 8

Ans 9:

Class : Class 9
can someone explain why?

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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 10

Ans 3:

Class : Class 7
THE CORRECT ANS IS OPTION C

Ans 4:

Class : Class 7

Post Your Answer

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