National Science Olympiad Forum By SOF Olympiad Trainer

Dhruv from na, Udaipur

Subject :NSO Class : Class 6

Express the ratio of the area of Square A to the area of Rectangle B in its simplest form.

(A) 4 : 1

(B) 1 : 2

(C) 1 : 4

(D) 2 : 1
I have selected the correct option but it is showing me that I have sected another option. Why?

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Dhruv from na, Udaipur

Subject :NSO Class : Class 6

A change in which the original substance can be obtained back by reversing conditions is called

(A) Reversible change

(B) Physical change

(C) Irreversible change

(D) Both (A) & (B).
I think it should be a option. can anyone explain me?

Ans 1:

Preeti tanwar from DON BOSCO ACADEMY, Patna

Class : Class 9

a

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Soham from DPS sector 45, Gurgaon

Subject :NSO Class : Class 5

Sneh classified some materials as shown below.

W and X refer to _____ and _____ respectively.

A W : Allows light to pass through easily , X : Does not allow light to pass through at all
B W : Non magnetic , X : Magnetic
C W : Does not conduct electricity , X : Conducts electricity easily
D W : Colourless , X : Coloured

why is answer C correct option A is also correct

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Ans 1:

Shivam Dave from Jamnabai Narsee School, Gandhinagar

Class : Class 7

The answer should come as B as the class W is Non-Magnetic and class X is Magnetic not C as ice does conduct electricity. BIG MISTAKE ð

Ans 2:

rishi karthik from Bvm Global, chennai

Class : Class 5

You are correct B is the correct answer.

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Dhruva Shah from DPGA, Mumbai

Subject :NSO Class : Class 5

The diagram below shows what happens when four materials of the same size AB, CD, EF and GH are suspended next to one another.

Which of the following statements are correct?
(i) AB is a magnet.
(ii) B and C are unlike poles.
(iii) D attracts E.
(iv) EF is not a magnet.

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

I didn't understand how this happens

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Ans 1:

Jaanya Vijh from DPSG Meerut Road, Ghaziabad

Class : Class 5

Hi there, the answer is option C

Ans 2:

Prasenjit Nandy from ,

Class : Class 4

its right

Ans 3:

Srija Sneha from Lotus Valley International School, Noida

Class : Class 5

Hi there, Option C is correct

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Dhruva Shah from DPGA, Mumbai

Subject :NSO Class : Class 5

Sonal sets up 4 tests, namely Test P, Test Q, Test R and Test S.

Which two set-ups should she use to compare the effect of temperature on the rate of evaporation?

A Test P and Test S
B Test Q and Test S
C Test Q and Test R
D Test P and Test R

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Supreet Birdi from Global Indian International School, Bangalore

Subject :NSO Class : Class 4

Consider the following statements regarding carbon dioxide.

I .It is produced when an object is burnt.

II .It is consumed by living organisms during respiration.

III . It is released by green plants during photosynthesis.

Among the given statements,

Aonly I is incorrect
Bonly III is incorrect
Cboth I and II are incorrect
Dboth II and III are incorrect

Please explain

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Ans 1:

Aarush Bansal from PSBN, Bangalore

Class : Class 4

it is wrong answer

Ans 2:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar

Class : Class 4

The ans will also be option B

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Soham Gupta from JSSIS Dubai, Dubai

Subject :NSO Class : Class 3

Count the number of rectangles in the given figure.

(A) 8

(B) 9

(C) 10

(D) 11

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Ans 1:

Ravi Kumar Tammineni from ,

Class : Class 3

Yeah what you told is correct

Ans 2:

Admin from Revisewise, Noida

Class : Class 3

Answer: A

8

Solution: There are 8 rectangles in the given figure.

Ans 3:

Madhu Pujar from ,

Class : Class 3

8

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purnendu from National public school , indiranagar , Bengaluru

Subject :NSO Class : Class 3

Which of the following statements are correct?

(i) Safety means being careful and avoiding accidents only when walking on the road.

(ii) There are rules and signs for safety of people on the ship.

(iii) We must use footpath for walking and cyclists must keep to the left.

(iv) We must cross the road as we like anywhere and everywhere.

A (i), (ii), & (iii)
B (ii) & (iii)
C (iii) & (iv)
D (i) & (iii)

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Soham Gupta from JSSIS Dubai, Dubai

Subject :NSO Class : Class 3

Which part of the given figure needs to be shaded so that 5/8 of the figure is shaded ?

(A) P

(B) Q

(C) R

(D) S

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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Yashi Agrawal from Blue Ridge Public School , Pune

Subject :NSO Class : Class 8

Which one of the following would best reduce Climate Change?

AUsage of more organic food
BUsage of unleaded petrol instead of diesel in car engines
CUsage of wind energy in generating electricity
DDriving cars faster so that there is less time spent on journeys

What about pollution due to gases released by combustion of diesel in cars?

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Ans 1:

Kshitij verma from DPS KAMPTEE NAGPUR, Nagpur

Class : Class 8

yeah it is incorrect

Ans 2:

Khushi from Pathseekers, Beas

Class : Class 3

this is incorrect

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