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 9
c is the ans

Ans 2:

Class : Class 3

Ans 3:

Class : Class 1
D HE GAVE EXPLANATION

Ans 4:

Class : Class 9
kunal is wrong

Ans 5:

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

Ans 6:

Class : Class 3
D

Ans 7:

Class : Class 3
c is the correct answer

Ans 8:

Class : Class 5
abcd are correct

Ans 9:

Class : Class 3
It should be D

Ans 10:

Class : Class 4
c maybe????

Ans 11:

Class : Class 7

Ans 12:

Class : Class 9

Ans 13:

Class : Class 3

Ans 14:

Class : Class 3
NA

Ans 15:

Class : Class 9
C

Ans 16:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 17:

Class : Class 2

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 7
A is not correct D is correct

Ans 2:

Class : Class 3
all of these

Ans 3:

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 4:

Class : Class 9
D

Ans 5:

Class : Class 7
D is correct

Ans 6:

Class : Class 5

Ans 7:

Class : Class 8
all of these option(D)

Ans 8:

Class : Class 6
All of these

Ans 9:

Class : Class 6
D

Ans 10:

Class : Class 9
A

Ans 11:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 12:

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.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
I feel that it is D

Ans 2:

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

Ans 3:

Class : Class 9
D

Ans 4:

Class : Class 8
Definitely D

Ans 5:

Class : Class 8

Ans 6:

Class : Class 9
I do agree it's D

Ans 7:

Class : Class 10

Ans 8:

Class : Class 6

Ans 9:

Class : Class 9
d

Ans 10:

Class : Class 7
c should be the correct answer

Ans 11:

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 12:

Class : Class 8
D

Ans 13:

Class : Class 10

Ans 14:

Class : Class 9

Ans 15:

Class : Class 8

Ans 16:

Class : Class 10
The amount of water also matters right

Ans 17:

Class : Class 8
Option D is the correct answer

Ans 18:

Class : Class 7
i think amount of water also nedd

Ans 19:

Class : Class 5

Ans 20:

Class : Class 9
I think D is the correct answer

Ans 21:

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

Ans 22:

Class : Class 8
d is correct answer

Ans 23:

Class : Class 4
Water is also correct

Ans 24:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 5

Ans 2:

Class : Class 6
It really should be A

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

Ans 5:

Class : Class 7
c is the correct answer

Ans 6:

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 7:

Class : Class 6

Ans 8:

Class : Class 6
The answer is A.

Ans 9:

Class : Class 8
answer is a

Ans 10:

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 11:

Class : Class 6
It should be A

Ans 12:

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

Ans 13:

Class : Class 7

Ans 14:

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 15:

Class : Class 6
A is the correct answer

Ans 16:

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"

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
ans is option C

Ans 2:

Class : Class 7
answer is option c

Ans 3:

Class : Class 7
Please explain it to me.

Ans 4:

Class : Class 9
can someone explain why?

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8

Ans 7:

Class : Class 7

Ans 8:

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

Ans 9:

Class : Class 8
ans is option C

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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: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 3:

Class : Class 10

Ans 4:

Class : Class 7
THE CORRECT ANS IS OPTION C

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