National Science Olympiad Forum By SOF Olympiad Trainer

UMA NATH CHAUDHARY from D R AMin Memorial School, Vadodara

Subject :NSO Class : Class 5

Chaitanya suffers from stomach ache and bad digestion whenever he eats any wheat product whereas his brother Satvik complains of bad vision in dim light. Which of the following holds true regarding them?

A Chaitanya is suffering from vitamin C deficiency and should take more of citrus fruits in his diet.
B Satvik is suffering from iron deficiency and should take more of spinach, apple, etc., in his diet.
C Chaitanya is allergic to wheat products so he should stop taking them to avoid illness caused due to their consumption.
D Satvik is suffering from vitamin B₁ deficiency so he should take more of carrots and papaya.

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Geetansh Mittal from Dasmesh Public School, Faridkot

Subject :NSO Class : Class 10

A cylindrical bar magnet is rotated about its axis as shown in figure. If a wire is connected from the axis and is made to touch the cylindrical surface through a contact, then

AA direct current flows in the ammeter
BNo current flows through the ammeter
CA time varying current flows through the ammeter
DNone of these.

acc to me ans is opt b but it is given aplease respond quickly

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harry potter from hogwarts, hogsmeade

Subject :NSO Class : Class 6

Study the given table.

Characteristics	Plants
	P	Q	R
Its positively geotropic part stores food	✓	✗	✗
Stem helps in multiplication of plant vegetatively	✓	✓	✗
Stem manufactures food	✗	✗	✗
Root helps in climbing	✗	✓	✗

Select the option that correctly identifies P-S.

AP-Turnip; Q-Betel; R-Ginger
BP-Onion; Q-Pea; R-Potato
CP-Ginger; Q-Bougainvillea; R-Carrot
DP-Tapioca; Q-Sweet pea; R-Jimikand

i am the greatest boi

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Ans 1:

Jaivardhan Gupta from Thakur International School, Mumbai

Class : Class 7

Ans 2:

Shivani from DPS North school , Bangalore

Class : Class 7

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Hrishika sugandhi from Vikhe Patil Memorial School, pune

Subject :NSO Class : Class 6

Rati performed starch and protein test on few food items and tabulated the results as shown below.

Select the tests where her observation was right and she inferred correct result.

A 1 and 2 only
B 2 and 3 only
C 3 and 4 only
D 1 and 4 only

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Ans 1:

Lovyam Kumar from Fortuna Shine School , Purnea

Class : Class 6

question out of the sllaybus but can be solved it was a good and tough question

Ans 2:

Shreyasi Padihary from The Cambridge International School , Bangalore

Class : Class 7

good question

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ARCHITA DWIVEDI from DIVINE CHILD HIGH SCHOOL, MUMBAI

Subject :NSO Class : Class 8

To maintain soil fertility, nutrient replenishment of soil is essential. Common methods of adding nutrients to soil are given in the box below.

P = Field fallow Q = Green manure R = Fertilizers S = Organic wastes

Which of the following statements is incorrect regarding this ?

(A) P is not best suited because it leaves a field economically useless for a year or two.

(B) R increases productivity readily but prove to be environmental hazard in long run.

(C) S can cause spread of diseases due to pathogenic cysts present in it.

(D) Q are green plants that are ploughed back into soil to supply specific nutrients in desired ratio.
it is tough !!

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Ans 1:

ARCHITA DWIVEDI from DIVINE CHILD HIGH SCHOOL, MUMBAI

Class : Class 8

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ARCHITA DWIVEDI from DIVINE CHILD HIGH SCHOOL, MUMBAI

Subject :NSO Class : Class 8

All the following statements about instantaneous speed is false except for ______.

(A) Instantaneous speed is, when an object moves with the same speed throughout the journey.

(B) Instantaneous speed is measured in cm³ h^-1.

(C) Instantaneous speed is the average speed over a certain distance.

(D) Instantaneous speed is the speed at any instant of time during the journey.
it is very tough question

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Ans 1:

ARCHITA DWIVEDI from DIVINE CHILD HIGH SCHOOL, MUMBAI

Class : Class 8

but it is also measured in cm3 h-1????

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aryanvir from lotus valley international school, haryana

Subject :NSO Class : Class 8

Read the given statements and select the correct option.
Statement 1 : Mountaineers often encounter the problem of nose bleeding when they reach high altitudes.
Statement 2 : The blood pressure of their body becomes much less than the atmospheric pressure, making the blood vessels burst.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.

c

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RASESH SHARMA from BAL BHARATI PUBLIC SCHOOL, NOIDA

Subject :NSO Class : Class 7

The given figure is of human heart with its parts labelled as X, Y and Z. Which of the following correctly ranks the blood pressure in X, Y and Z from the lowest to the highest?

--------Lowest → Highest
AX → Y → Z
BY → X → Z
CZ → X → Y
DZ → Y → X

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Ans 1:

aniket sabat from vishwajyot high school, navi mumbai

Class : Class 9

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Dhairya Vinayak from Loyola High School, Patna

Subject :NSO Class : Class 7

Which of the following statements is not correct in case of an electric fuse?

AFuses are inserted in electric circuits of all buildings.
BThere is a maximum limit of the current which can safely flow through the electric circuits.
CThere is a minimum limit of the current which can safely flow in the electric circuits.
DIf a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.

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Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi

Class : Class 8

Ans c.. Fuse has only maximum limit

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi

Class : Class 8

Ans c.. Fuse has only maximum limit

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Devina kashyap from TPS, Mumbai

Subject :NSO Class : Class 5

Which of the following is not a greenhouse gas?

ACarbon dioxide
BMethane
COzone
DSulphur dioxide

sulphur dioxide is a greenhouse gas and infact it possess 100 year global warming potential as compared to any other greenhouse gas whereas ozone is not a green house gas so answer C should be correct and not D

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Ans 1:

Soham Hatua from The Hindu Senior Secondary School, Chennai

Class : Class 6

yeah sulphur dioxide forms acid rain

Ans 2:

Atharv Mishra from Podar International School, Mumbai

Class : Class 7

Sulphur dioxide does cause acid rain but, is not a greenhouse gas as, it can not / does not trap heat.

Ans 3:

Anvi Ranade from ,

Class : Class 1

I don’t think that ozone is a greenhouse gas …

Ans 4:

Shreyasi Padihary from The Cambridge International School , Bangalore

Class : Class 7

Ozone and Sulphur dioxide both are green house gas. All the options are greenhouse gas and there is no correct answer in my opinion

Ans 5:

Devina kashyap from TPS, Mumbai

Class : Class 4

sulphur dioxide is a greenhouse gas infact it possess 100 year global warming potential than any other greenhouse gas and ozone is not a greenhouse gas so option C should be correct and not D

Ans 6:

shahana from Hindustan international, Chennai

Class : Class 5

Ans 7:

Mihika Hivarekar from Global Indian International School, Pune

Class : Class 7

Ans 8:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad

Class : Class 6

ozone traps heat so it is a greenhouse gas

Ans 9:

samanvay sinha from School of India, Bangalore, bengaluru

Class : Class 5

Sulphur dioxide is a greenhouse gas.

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