National Science Olympiad Forum By SOF Olympiad Trainer - Page 678

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
4 th blank will be filled with fertilisation correct ans is b Pollen grains are deposited on stigma and not style

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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

Ans 2:

Class : Class 5
abcd are correct

Ans 3:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 4:

Class : Class 3
NA

Ans 5:

Class : Class 2

Ans 6:

Class : Class 9
kunal is wrong

Ans 7:

Class : Class 9
C

Ans 8:

Class : Class 7

Ans 9:

Class : Class 3
c is the correct answer

Ans 10:

Class : Class 3
D

Ans 11:

Class : Class 3
It should be D

Ans 12:

Class : Class 1
D HE GAVE EXPLANATION

Ans 13:

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

Ans 14:

Class : Class 9

Ans 15:

Class : Class 3

Ans 16:

Class : Class 9
c is the ans

Ans 17:

Class : Class 4
c maybe????

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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 6
All of these

Ans 4:

Class : Class 8
A is not correct D is correct

Ans 5:

Class : Class 9
D

Ans 6:

Class : Class 8
all of these option(D)

Ans 7:

Class : Class 9
A

Ans 8:

Class : Class 5

Ans 9:

Class : Class 3
all of these

Ans 10:

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 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
D is correct

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
d is correct answer

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
Option D is the correct answer

Ans 4:

Class : Class 7
i think amount of water also nedd

Ans 5:

Class : Class 8
D

Ans 6:

Class : Class 9
d

Ans 7:

Class : Class 7
c should be the correct answer

Ans 8:

Class : Class 8
Definitely D

Ans 9:

Class : Class 5

Ans 10:

Class : Class 9
I think D is the correct answer

Ans 11:

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

Ans 12:

Class : Class 9
D

Ans 13:

Class : Class 9

Ans 14:

Class : Class 10

Ans 15:

Class : Class 3
The amount of water also matters right

Ans 16:

Class : Class 7
I feel that it is D

Ans 17:

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 18:

Class : Class 7

Ans 19:

Class : Class 9
I do agree it's D

Ans 20:

Class : Class 4
Water is also correct

Ans 21:

Class : Class 10

Ans 22:

Class : Class 6

Ans 23:

Class : Class 8

Ans 24:

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

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Subject :NSO    Class : Class 6

Ans 1:

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 2:

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

Ans 3:

Class : Class 7
c is the correct answer

Ans 4:

Class : Class 6
The answer is A.

Ans 5:

Class : Class 5

Ans 6:

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 7:

Class : Class 6
It really should be A

Ans 8:

Class : Class 6
It should be A

Ans 9:

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 10:

Class : Class 7

Ans 11:

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

Ans 12:

Class : Class 8
answer is a

Ans 13:

Class : Class 6

Ans 14:

Class : Class 6
A is the correct answer

Ans 15:

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 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 7

Ans 2:

Class : Class 9
can someone explain why?

Ans 3:

Class : Class 7
Please explain it to me.

Ans 4:

Class : Class 9
ans is option C

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
answer is option c

Ans 8:

Class : Class 8

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
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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