National Science Olympiad Forum By SOF Olympiad Trainer - Page 679

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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 5
abcd are correct

Ans 2:

Class : Class 9
C

Ans 3:

Class : Class 9

Ans 4:

Class : Class 2

Ans 5:

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

Ans 6:

Class : Class 4
c maybe????

Ans 7:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 8:

Class : Class 9
kunal is wrong

Ans 9:

Class : Class 9
c is the ans

Ans 10:

Class : Class 3
D

Ans 11:

Class : Class 3
NA

Ans 12:

Class : Class 3
It should be D

Ans 13:

Class : Class 3

Ans 14:

Class : Class 1
D HE GAVE EXPLANATION

Ans 15:

Class : Class 7

Ans 16:

Class : Class 3

Ans 17:

Class : Class 3
c is the correct answer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
D

Ans 2:

Class : Class 6
D

Ans 3:

Class : Class 8
all of these option(D)

Ans 4:

Class : Class 8
D is correct

Ans 5:

Class : Class 6
All of these

Ans 6:

Class : Class 3
all of these

Ans 7:

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 8:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 9:

Class : Class 9
A

Ans 10:

Class : Class 5

Ans 11:

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 12:

Class : Class 8
A is not correct D is correct

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
d

Ans 2:

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 3:

Class : Class 9
D

Ans 4:

Class : Class 4
Water is also correct

Ans 5:

Class : Class 7
i think amount of water also nedd

Ans 6:

Class : Class 5

Ans 7:

Class : Class 6

Ans 8:

Class : Class 7
c should be the correct answer

Ans 9:

Class : Class 8
D

Ans 10:

Class : Class 8
Definitely D

Ans 11:

Class : Class 9
I do agree it's D

Ans 12:

Class : Class 8

Ans 13:

Class : Class 10

Ans 14:

Class : Class 8
Option D is the correct answer

Ans 15:

Class : Class 9

Ans 16:

Class : Class 10

Ans 17:

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

Ans 18:

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

Ans 19:

Class : Class 3
The amount of water also matters right

Ans 20:

Class : Class 7
I feel that it is D

Ans 21:

Class : Class 8

Ans 22:

Class : Class 7

Ans 23:

Class : Class 8
d is correct answer

Ans 24:

Class : Class 9
I think D is the correct answer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
c is the correct answer

Ans 2:

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 3:

Class : Class 6
The answer is A.

Ans 4:

Class : Class 8
answer is a

Ans 5:

Class : Class 6

Ans 6:

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 7:

Class : Class 6
It really should be A

Ans 8:

Class : Class 6
It should be A

Ans 9:

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

Ans 12:

Class : Class 6
A is the correct answer

Ans 13:

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 14:

Class : Class 5

Ans 15:

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

Ans 16:

Class : Class 7

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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 8

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7
Please explain it to me.

Ans 6:

Class : Class 9
can someone explain why?

Ans 7:

Class : Class 8

Ans 8:

Class : Class 8
ans is option C

Ans 9:

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

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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
THE CORRECT ANS IS OPTION C

Ans 2:

Class : Class 7

Ans 3:

Class : Class 10

Ans 4: (Master Answer)

Class : Class 1
The correct answer is C.

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