National Science Olympiad Forum By SOF Olympiad Trainer

Het Aryan from Podar International School , Pune

Subject :NSO Class : Class 9

The given diagram represents a fractionating column where petroleum is separated into various fractions. Arrange the fractions X, Y, Z in order of decreasing boiling point range and identify the fraction that condenses first.

AZ > Y > X; X
BZ > Y > X; Z
CX > Y > Z; Y
DY > Z > X; Z

Fractional distillation.

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Ans 1:

Het Aryan from Podar International School , Pune

Class : Class 9

Ok

Ans 2:

Ashvik Banerjee from Mount Litera Zee School , Vasco

Class : Class 9

It is B

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mahati from Delhi public school, Hyderabad

Subject :NSO Class : Class 5

Find the missing number in the given number pattern.
3, 9, 27, 81, __?__

A213
B243
C198
D256

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Sanjay Srinivasan from Inventure academy, Bangalore

Subject :NSO Class : Class 7

Identify the incorrect matches and select the correct option.
(i) Vitamin B₁ – Thiamine
(ii) Vitamin B₃ – Niacin
(iii) Vitamin B₇ – Pantothenic acid
(iv) Vitamin B₁₂ – Biotin

A(i) and (ii)
B(i) and (iii)
C(iii) and (iv)
D(ii) and (iv)

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Antareep Mukherjee from New Horizon Public School, Bangalore

Class : Class 8

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Ridhima Mishra from DPS Kalyanpur , Kanpur

Subject :NSO Class : Class 8

An oil spill covered a large area of water in an ocean. The marine life in that area was badly affected. A lot of marine animals were found dead and floating on the surface of the water. This is because ____________.
(i) They drank the water that was contaminated by the oil
(ii) The fish swallowed the oil and were poisoned
(iii) Eutrophication caused as a result of oil spill leads to depletion of oxygen in water body.

A (ii) only
B (i) and (ii) only
C (ii) and (iii) only
D (i), (ii) and (iii)

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Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

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Sanjay Srinivasan from Inventure academy, Bangalore

Subject :NSO Class : Class 7

Meenakshi walks 1 km towards East and then she turns to South and walks 5 km. Again she turns to East and walks 2 km, after this she turns to North and walks 9 km. Now, how far is she from her starting point?

A3 km
B4 km
C5 km
D7 km

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Ans 1:

Vihaan from Dhirubhai Ambani International School, Mumbai

Class : Class 7

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LAKSH RAJ from Mothers global school, Delhi

Subject :NSO Class : Class 4

Mansi did a study on two fabrics, P and Q. At the end of her study she prepared following table about her observations. What can be the name of these two fabrics?

AFabric P-Rayon Fabric Q-Lycra
BFabric P-Cotton Fabric Q-Linen
CFabric P-Polyester Fabric Q-Silk
DFabric P-Silk Fabric Q-Cotton

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ANWESHA PATRA from VYDEHI SCHOOL OF EXCELLENCE, Banglore

Subject :NSO Class : Class 7

Find the number of squares formed in the given figure.

A30
B34
C32
D35

how

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Jaron Joyson from Indian School al Ghubra, Muscat

Subject :NSO Class : Class 7

Select a figure from the options which will continue the same series as established by the Problem Figures.

A
B
C
D

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Raghav Srinivasan from new horizon, bangalore

Subject :NSO Class : Class 3

Wool is obtained from _____.

ASheep
BRabbit
CGoat
DAll of these

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Ravi from Greenwoodhigh, Bengaluru

Subject :NSO Class : Class 5

Study the given Venn diagram and select the correct option.

AX can be an animal that has wings and Z can be an animal that breathes through spiracles
BY can be an animal having outer body covering of scales and X can be an animal that has outer body covering of fur
CW can be an animal that lays eggs and Y can be an animal that has hair on its body
DY can be an animal whose young one breathes through gills and there is no animal as Z