National Science Olympiad Forum By SOF Olympiad Trainer

Naman surana from Witty international udaipur, Udaipur

Subject :NSO Class : Class 8

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light

A Remains constant
B Continuously increases
C Continuously decreases
D First increases than decreases.

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Ans 1:

Naman surana from Witty international udaipur, Udaipur

Class : Class 8

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Jayaditya singh from Delhi Public School, gurgaon

Subject :NSO Class : Class 3

Read the given conversation.
Which of the following statements is correct regarding X, Y and Z?

A X could be ruby and Z could be tungsten.
B Y could be granite and Z could be quartz.
C X could be diamond and Y could be silica.
D Y could be graphite and Z could be tungsten.

B

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Ans 1:

divita saxena from bhavans vidya mandir ashti nagpur, nagpur

Class : Class 3

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

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

B

Ans 3:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

D

Ans 4:

Jayaditya singh from Delhi Public School, gurgaon

Class : Class 3

B

Ans 5:

Darshini Chakravarty from Pinnacle High International School, Mumbai

Class : Class 3

b

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Jayaditya singh from Delhi Public School, gurgaon

Subject :NSO Class : Class 3

Manish is trying to dissolve some material in the water but it is not getting dissolved.
What it could be?

A Sugar cube
B Chalk powder
C Glucose powder
D Rock salt

sugar cube A

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Ans 1:

divita saxena from bhavans vidya mandir ashti nagpur, nagpur

Class : Class 3

b chalk powder

Ans 2:

Arohan chatterjee from Bharatiya vidya bhavan salt lake, Kolkata

Class : Class 3

Ans. B

Ans 3:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

B

Ans 4:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

B

Ans 5:

Arth Karna from Presidium, New Delhi

Class : Class 3

VERY GOOD !!!!!!""""""""""

Ans 6:

Jayaditya singh from Delhi Public School, gurgaon

Class : Class 3

A

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Saranyaa Adak from Delhi Public School, Durgapur

Subject :NSO Class : Class 8

When a teacher is talking in an enclosed air-conditioned classroom, the students do not hear echo because
(1) The wall is not big enough.
(2) Sound travels too fast.
(3) The sound energy is absorbed by the students and the furniture.

A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3).

Proper terms should be used that make the meaning clearer

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Ans 1:

Pravir Mishra from National Public School, Bengaluru

Class : Class 8

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legendary ninja from dps gurgaon, Gurgaon

Subject :NSO Class : Class 5

Which of the following statements is correct?

A Installing catalytic converters in automobiles reduce vehicular exhaust.
B Manures used to increase crop yield causes air pollution.
C Water pollution leads to soil erosion.
D Afforestation destroys habitat of land animals.

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Ans 1:

legendary ninja from dps gurgaon, Gurgaon

Class : Class 6

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Jayesh Mahajan from Delhi public school Jalandhar , Jalandhar

Subject :NSO Class : Class 5

The picture below shows how a plant grows.

Which of the following can be inferred from the given picture?

AA seed has life.
BA seed needs air, water and food to grow.
CA seed cannot grow on its own.
DA seed does not need air and water to grow.

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Meher Batra from The Gurukul, Zirakpur, Zirakpur, Punjab

Subject :NSO Class : Class 3

What should Jaya do to make the shadow of Object X larger?

(1) She should put Object X nearer to the screen.
(2) She should put Object X further away from the light source.
(3) She should put Object X nearer to the light source.

A (1) and (3)
B (1) and (2)
C (3) only
D (2) only

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Ans 1:

divita saxena from bhavans vidya mandir ashti nagpur, nagpur

Class : Class 3

c 3 only

Ans 2:

FAIZA AMIN from SAINT XAINS INTERNATIONAL SCHOOL ANANTNAG, ANANTNAG

Class : Class 3

C

Ans 3:

bushra from uttam,

Class : Class 3

Ans 4:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

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Devansh k joshi from Lotus, Ahmedabad

Subject :NSO Class : Class 4

Refer to the given word gird. Select the option which is NOT hidden in the grid.

A It causes soil pollution.
B The disease that occurs due to contaminated water.
C It is one of the negative impact of deforestation.
D Farmers use it in their fields to grow crops.

I have 31 marks yeah!!!!!!

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Ans 1:

Rishit Garg from Bhavan s B P Vidya Mandir , Nagpur

Class : Class 3

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Shreetej from Pearson public school, Pune

Subject :NSO Class : Class 5

Which letter is exactly midway between the 7^th letter from the left end and 8^th letter from the right end in the English alphabet series?

A K
B L
C M
D N

ans=c

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Ans 1:

Shreetej from Pearson public school, Pune

Class : Class 5

ans=c

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Shreetej from Pearson public school, Pune

Subject :NSO Class : Class 5

Select a figure from the options in which Fig.(X) is exactly embedded as one of its part.

A
B
C
D

ans=b

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Ans 1:

Shreetej from Pearson public school, Pune

Class : Class 5

ans=B

Ans 2:

Shreetej from Pearson public school, Pune

Class : Class 5

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