National Science Olympiad Forum By SOF Olympiad Trainer - Page 511

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 8

Ans 2:

Class : Class 9
C

Ans 3:

Class : Class 6
Explain

Ans 4:

Class : Class 7

Ans 5:

Class : Class 6
C is fax which is type of visual communication

Ans 6:

Class : Class 8
C

Ans 7:

Class : Class 8
explain

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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 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 5

Ans 4:

Class : Class 6
c

Ans 5:

Class : Class 5

Ans 6:

Class : Class 7
I am bengali , hindi , english and malayalam . This looks pity to me !!!!!!!!!!!!!!!!!!!

Ans 7:

Class : Class 7

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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 8
the correct is D.

Ans 2:

Class : Class 8
d is the answer

Ans 3:

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

Ans 4:

Class : Class 8
d

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
You are wrong.The correct answer should be D.

Ans 7:

Class : Class 3
Correct answer is D

Ans 8:

Class : Class 6
You are right. It should be D.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Ans is A because bituminous is not an ore, typhoid is not a vector-borne disease and nutcracker is not a class 1 lever.

Ans 2:

Class : Class 8
The correct answer is A because Bituminous is not a ore, typhoid is a water-borne disease and rest are vector-borne disease and nutcracker is an example of 2nd class lever whereas all the other are 1st class lever.

Ans 3:

Class : Class 5
I agree Areen

Ans 4:

Class : Class 5

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
the answer is b . this is because sun tan is temporary.

Ans 2:

Class : Class 9
answer is b

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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
IT SHOU BE D!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 2:

Class : Class 9
IT must be D! Nylon does not burn with the smell of burning hair as it is purely synthetic and has no relation to the protein based hair.

Ans 3:

Class : Class 8
It should be D. Because nylon would never once burn with smell of paper in it's entire career. SOF, you gotta chnage the answer man.

Ans 4:

Class : Class 8
Nylon does not have the smell of burning hair. So the answer should be d.

Ans 5:

Class : Class 9
How can Nylon burn with the smell of burning hair??

Ans 6:

Class : Class 10

Ans 7:

Class : Class 9
Supposed to be D

Ans 8:

Class : Class 9
yes the answer is D. nylon burns with a smell of celery because its a synthetic fibre.

Ans 9:

Class : Class 8
wool burns with smell of burning hair

Ans 10:

Class : Class 9
wrong answerthe answer should be B

Ans 11:

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

Ans 12:

Class : Class 8
Correct answer is A

Ans 13:

Class : Class 8
Nylon should neither have a smell of burning hair nor the smell of burning paper. Nylon has a celery or plastic-like cell. Hence the correct answer is D. But on the other hand when acrylic burns, it shrinks and converts into black beads. On this contrast, the correct answer will be B with respect to acrylic and D with respect to Nylon. There is definitely an error in the options of the answers!

Ans 14:

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

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Subject :NSO    Class : Class 8

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