National Science Olympiad Forum By SOF Olympiad Trainer - Page 441

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 10

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Mark the incorrect statement.

A Melting of wax is a physical change while burning of wax in a candle is a chemical change.
B Metals expand on heating while contract on cooling. Both are physical changes.
C Composition of matter changes during a chemical change while it remains same during a physical change.
D High and low tides in sea are the examples of non-periodic changes while growth of a tree is a periodic change.


Ans 1:

Class : Class 6
D is the correct answer because the revolution of moon around the earth causes high tides and low tides and tree doesn't grow everyday.

Ans 2:

Class : Class 7
Option d is correct right can anyone explain the correct answer given

Ans 3:

Class : Class 6
yea yea its D we get it

Ans 4:

Class : Class 9
Option d is correct

Ans 5:

Class : Class 8
Option D is incorrect

Ans 6:

Class : Class 8
d

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
Its option C

Ans 2:

Class : Class 9
But how?

Ans 3:

Class : Class 10
Option C

Ans 4:

Class : Class 10
Option C

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
What is meant by the term 'AMMONOTELISM, UREOTELISM, URICOTELISM'?

Ans 2:

Class : Class 7

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Subject :NSO    Class : Class 7

Farheen soaked some bean seeds in water overnight. Next morning she drained the water and kept the seeds moist till they started germinating. She boiled half of the seeds and then kept the germinating seeds in one thermos flask (X) and the boiled seeds in another thermos flask (Y). She covered the mouths of both flasks with moist cotton wool. Then she inserted thermometers in both flasks and kept the flasks as shown in the figure.


What would be her observation?

A Temperature of flask X increases because it has photosynthesising seeds.
B Temperature of flask X increases because it has respiring seeds.
C Temperature of flask Y increases because it has boiled seeds.
D Both (B) and (C)


Ans 1:

Class : Class 7
please explain i could not understand

Ans 2:

Class : Class 7
the seeds are boiled so how are they not hot so It should be (d)

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
For part (i.) the odd one out is iodineBecause Iodine is a micronutrient while calcium, potassium, and sodium are macronutrients.For part (ii.) odd one is Vitamin B.Because Vitamin B is water-soluble vitamin while Vitamin A, D, and E are fat-soluble vitamins.For part (iii.) the odd one out is OilSince oil is unsaturated fat while Cheese, Butter, and Ghee are the saturated ones.

Ans 2:

Class : Class 10
The correct option is B

Ans 3:

Class : Class 8
In B,how is iodine the odd one out.

Ans 4:

Class : Class 9
How is oil nor iodine can be odd one out in this question

Ans 5:

Class : Class 3
I don't think it's B as for the last one, cheese is a rich source of protein while the others are full of fats. The correct answer is C

Ans 6:

Class : Class 6
yeah the correct option is B

Ans 7:

Class : Class 7

Ans 8:

Class : Class 7
answer b

Ans 9:

Class : Class 7
Answer should be B

Ans 10:

Class : Class 6
Can anyone explain why Iodine is the odd one out?

Ans 11:

Class : Class 6
Explaination=1) Iodine is the odd one as it is a trace mineral (required in small amounts)2) Vitamin B is water soluble while the others are fat soluble 3) Oil is an unsaturated while the others are saturated

Ans 12:

Class : Class 8
the correct one is B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
b

Ans 2:

Class : Class 3
answer is B

Ans 3:

Class : Class 8
Option (B) is correct. Doesn't it look like the foot of a Hen/Chicken?.

Ans 4:

Class : Class 8
The correct answer is B .

Ans 5:

Class : Class 8

Ans 6:

Class : Class 7
ans b

Ans 7:

Class : Class 5

Ans 8:

Class : Class 3
Answer is b or d

Ans 9:

Class : Class 5
Cdba

Ans 10:

Class : Class 6
The answer is B

Ans 11:

Class : Class 5
ANSWER IS B

Ans 12:

Class : Class 5
very easy BBBBBBBBBBBB

Ans 13:

Class : Class 5

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
easy

Ans 2:

Class : Class 4

Ans 3:

Class : Class 7
ANSWER IS C

Ans 4:

Class : Class 9

Ans 5:

Class : Class 9
How can this be

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