National Science Olympiad Forum By SOF Olympiad Trainer

YAGYA SHUKLA from KENDRIYA VIDYALAYA AFS BEGUMPET, HYDERABAD

Subject :NSO Class : Class 8

In the given diagram, when a weight of 100 g is hung from the spring, its length is 9 cm. When a weight of 150 g is hung from it, its length is 11 cm. What is the length of the spring when there is no weight hanging from it?

A 2 cm
B 4 cm
C 5 cm
D 7 cm

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Ans 1:

SONAL MUKUND SHINDE from PODAR INTERNATIONAL SCHOOL SANGLI, TASGAON

Class : Class 10

Ans 2:

SONAL MUKUND SHINDE from PODAR INTERNATIONAL SCHOOL SANGLI, TASGAON

Class : Class 10

Option A

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ALICE from Delhi Public School, UDAIPUR

Subject :NSO Class : Class 5

Karan walks 8 m towards North and then turn left and walks 7 m. Again he turns to right and walks 3 m. Finally, he turns right and walks 7 m. In which direction is he now with respect to the starting point?

AEast
BWest
CNorth
DSouth

GR8 question

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Ans 1:

ALICE from Delhi Public School, UDAIPUR

Class : Class 9

cdvg

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Sanvi from K R Mangalam, Ghaziabad

Subject :NSO Class : Class 5

A break in continuity of a bone is called fracture. Select the incorrect option regarding it.

AAs a first aid, one must ensure that the part fractured should not move.
BSimple fractures can heal naturally if not disturbed.
CA fractured bone cannot be repaired without medicines.
DFractures occur due to high force, impact or trauma.

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Ans 1:

Shraddha S Nair from Bright CBSE, Day school vasna, Vadodara

Class : Class 7

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Sahasra Shanker from KV IIT, Chennai

Subject :NSO Class : Class 10

Read the passage carefully and answer the following questions. A beam of white light falling on a glass prism gets split into seven colours marked 1 to 7 as shown in figure.

Which of the following statement is correct?

A The colours in the order of increasing wavelength are 1 < 2 < 3 < 4 < 5 < 6 < 7.
B The colours in the order of increasing frequency are 1 < 2 < 3 < 4 < 5 < 6 < 7.
C The colours in the order of decreasing speed are 7 > 6 > 5 > 4 > 3 > 2 > 1.
D The colours in the order of decreasing deviation are 1 > 2 > 3 > 4 > 5 > 6 > 7.

how to do this

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Pranav from JSS Public School, Bengaluru

Subject :NSO Class : Class 9

Which of the following molecules contains highest number of particles?

A 8 g of CH₄
B 4.4 g of CO₂
C 34.2 g of C₁₂H₂₂O₁₁
D 2 g of H₂

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Ans 1:

Pranav from JSS Public School, Bengaluru

Class : Class 10

Ans 2:

Pranav from JSS Public School, Bengaluru

Class : Class 10

Ans 3:

Pranav from JSS Public School, Bengaluru

Class : Class 10

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anu from Haralur, Bengaluru

Subject :NSO Class : Class 2

In hilly areas, houses are made with sloping roofs because it prevents ________.

A Mountain animals from getting into house
B Flood water to enter into house
C The house from breaking down in storms
D Snow from collecting on the roof

D

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Ans 1:

Sidharth V from Hindustan International School, Chennai

Class : Class 4

Ans 2:

anu from Haralur, Bengaluru

Class : Class 5

dddddDDDDDD

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ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM

Subject :NSO Class : Class 3

Aman went to watch a football match. He wrote his experience on a picture card as shown here.
His father explained that it is the force applied on the football which causes it to ________.

A Move faster or slower
B Stop moving
C Change its direction of motion
D All of these

so HENCE THE ANSWER IS ALL OF THESE MEANS D ONE

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Ans 1:

Krithik Mishra from Delhi Public School East, Bangalore

Class : Class 6

it will be (d) because it dose all of them

Ans 2:

Vaishnavi from DPS , Singapore

Class : Class 3

Ans 3:

SS from meridian, hyderabad

Class : Class 5

no way

Ans 4:

Aradhya Shankar from Vibgyor, Kolhapur

Class : Class 4

D is right

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swasthi m bhat from vivekananda cbsc school, puttur

Subject :NSO Class : Class 1

Ravi circled the odd member in the following four groups, but made one mistake. Find out the group in which he circled incorrect member.

A , Road, Mountain, Car
B Elephant, Pumpkin plant, Wood,
C Air, Water, Soil,
D , Book, Aeroplane, Fan

Why it is option b?

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Anwesha Kale from wisdom world school, pune

Subject :NSO Class : Class 5

Refer to the given Venn diagram.

Select the option which correctly identifies P-S.

AP- Beetle Q- Leech R- Parrot S- Cockroach
BP- Frog Q- Lizard R- Fish S- Crow
CP- Earthworm Q- Frog R- Beetle S- Snake
DP- Amoeba Q- Crocodile R- Lizard S- Grass hopper