National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
Option D)

Ans 3:

Class : Class 6
D) Both A & B

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Subject :NSO    Class : Class 8

Read the given statements and mark the correct option.
Statement 1 : Copper sulphate solution is a good conductor of electricity.
Statement 2 : Conduction of electricity takes place in liquids due to flow of ions.

ABoth statement 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.


Question is very confusing. Statement 2 does not naturally flow from statement 1. statement 2 may have read that "All salts allow flow of ions"

Ans 1:

Class : Class 8
excuse me!!!! Is water not a liquid? :)

Ans 2:

Class : Class 8
yes it is but it does not have ions that can conduct electricity

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
ya its b

Ans 2:

Class : Class 8

Ans 3:

Class : Class 5
Option B

Ans 4:

Class : Class 8
b?

Ans 5:

Class : Class 9
Even i chose option B. Plz explain why would the answer be option D

Ans 6:

Class : Class 8
The answer must be Option B

Ans 7:

Class : Class 6

Ans 8:

Class : Class 8
no guys m sorry but their answer is correct as when we wear water goggle we can see clear. its fault our eyes not water.

Ans 9:

Class : Class 8
I too did B but the answer according to sof is DPlease explain

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
answer is d because after new moon cresent moon comes after 2 days

Ans 2:

Class : Class 6
the answer is D. because after the full moon, there comes the glibbous moon

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 4

Which of the following statements is INCORRECT?

APlant and animals help to maintain the balance of oxygen and carbon dioxide in nature.
BCamouflage is the ability of an animal to change its colour to blend or merge with its surrounding.
CDue to the extreme heat and lack of food, some animals survive the summer season by going into a kind of deep sleep called hibernation.
DFew animals living in cold Arctic and Antarctic region have a thick layer of fat called blubber under their skin.


correct ans C

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
answer b is right

Ans 2:

Class : Class 4
it will be option b light falls on screen in reverse order of VIBGYOR after dispersion

Ans 3:

Class : Class 7
Option b is the correct answer .

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
Answer is A

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 4
d as graphite is used to make pencil lead and bulb is made up of tungsten

Ans 3:

Class : Class 3
D

Ans 4:

Class : Class 4
b

Ans 5:

Class : Class 3
B

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