National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

Class : Class 4
C

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

Read the given paragraph with few blanks and select the option that correctly fills these blanks.
Plants reproduce vegetatively by different means. Plants like ______ reproduce with the help of leaves,______ and ______ reproduce by stem and ______ reproduces by roots. Some plants like mushrooms reproduce by ______.

ABryophyllum, potato, turnip, ginger, spores
BBegonia, onion, rose, sweet potato, seeds
CBryophyllum, rose, potato, turnip, spores
DBegonia, potato, onion, sugarcane, seeds


Ans 1:

Class : Class 5
c

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Subject :NSO    Class : Class 8

When light falls on a surface, light bounces off the surface. This is called reflection. When light falls on a smooth surface, the surface reflects the light in a well defined manner. The best example is plane mirror.
Why rose appears red in colour to our eyes?

AIt absorbs the red colour and reflects rest of the colours.
BIt absorbs the red colour and refracts rest of the colours.
CIt refracts the red colour and absorbs rest of the colours.
DIt reflects the red colour and absorbs rest of the colours.


Ans 1:

Class : Class 10
DIt reflects the red colour and absorbs rest of the colours.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
I think you are right it should be D.

Ans 2:

Class : Class 3
You are right. It should be D.

Ans 3:

Class : Class 1
You are wrong.The correct answer should be D.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Ans is A because bituminous is not an ore, typhoid is not a vector-borne disease and nutcracker is not a class 1 lever.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
answer is b

Ans 2:

Class : Class 6
the answer is b . this is because sun tan is temporary.

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Subject :NSO    Class : Class 8

Match column I with column II and choose the correct option from the codes given below.

Column I Column II
P. Nylon (i) Burns quickly with a smell of burning paper
Q. Wool (ii) Burns with sooty flame, fabric shrinks and black beads are formed
R. Acrylic (iii) Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair
S. Rayon (iv) Burns slowly with a smell of burning hair


A P - (i), Q - (iv), R - (ii), S - (iii)
B P - (iii), Q - (iv), R - (ii), S - (i)
C P - (iv), Q - (iii), R - (i), S - (ii)
D P - (ii), Q - (iv), R - (iii), S - (i)


Ans 1:

Class : Class 8
How is this possible Nylon burns with smell of hair???

Ans 2:

Class : Class 9
nylon burns with a smell of plastic, not burning hair. WTF?

Ans 3:

Class : Class 8
wool burns with smell of burning hair

Ans 4:

Class : Class 8

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Subject :NSO    Class : Class 8

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