National Science Olympiad Forum By SOF Olympiad Trainer - Page 643

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6
Ans is A because lungs send oxygen-rich blood to the heart and this oxygen-rich blood is sended to all body parts and the carbondioxide-rich blood goes back to the heart from the body this carbondioxide-rich blood is sended to the lungs.

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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
D

Ans 2:

Class : Class 1
D HE GAVE EXPLANATION

Ans 3:

Class : Class 9
c is the ans

Ans 4:

Class : Class 9
C

Ans 5:

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

Ans 6:

Class : Class 3
HE DID NOT EXPLAIN.

Ans 7:

Class : Class 3
NA

Ans 8:

Class : Class 6

Ans 9:

Class : Class 3

Ans 10:

Class : Class 3

Ans 11:

Class : Class 7
kunal is wrong

Ans 12:

Class : Class 4
c maybe????

Ans 13:

Class : Class 5
abcd are correct

Ans 14:

Class : Class 7

Ans 15:

Class : Class 7

Ans 16:

Class : Class 3
c is the correct answer

Ans 17:

Class : Class 3
It should be D

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8
all of these option(D)

Ans 2:

Class : Class 6
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 6
D

Ans 5:

Class : Class 7
A is not correct D is correct

Ans 6:

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 7:

Class : Class 1
d and Gaurika actually chocolate contains fats

Ans 8:

Class : Class 3
all of these

Ans 9:

Class : Class 9
A

Ans 10:

Class : Class 7
D is correct

Ans 11:

Class : Class 9
D

Ans 12:

Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 10
The amount of water also matters right

Ans 2:

Class : Class 10

Ans 3:

Class : Class 8
d is correct answer

Ans 4:

Class : Class 7
I feel that it is D

Ans 5:

Class : Class 7

Ans 6:

Class : Class 9
I do agree it's D

Ans 7:

Class : Class 9

Ans 8:

Class : Class 5

Ans 9:

Class : Class 7
c should be the correct answer

Ans 10:

Class : Class 8

Ans 11:

Class : Class 7
i think amount of water also nedd

Ans 12:

Class : Class 8
Option D is the correct answer

Ans 13:

Class : Class 10

Ans 14:

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

Ans 15:

Class : Class 9
D

Ans 16:

Class : Class 6

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 9
I think D is the correct answer

Ans 19:

Class : Class 8
D

Ans 20:

Class : Class 8
Definitely D

Ans 21:

Class : Class 4
Water is also correct

Ans 22:

Class : Class 8

Ans 23:

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

Ans 24:

Class : Class 9
d

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
c is the correct answer

Ans 3:

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 4:

Class : Class 6
It should be A

Ans 5:

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

Ans 8:

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

Ans 9:

Class : Class 6
The 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
A is the correct answer

Ans 12:

Class : Class 6

Ans 13:

Class : Class 5

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 8
answer is a

Ans 16:

Class : Class 6
It really should be A

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
Please explain it to me.

Ans 3:

Class : Class 8
ans is option C

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 8

Ans 8:

Class : Class 9
can someone explain why?

Ans 9:

Class : Class 7
answer is option c

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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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