National Science Olympiad Forum By SOF Olympiad Trainer

Aran Gupta from Shri Ram Centennial School, Dehradun

Subject :NSO Class : Class 3

Select the nutrient content graph that most likely represents a slice of brown bread.

A
B
C
D

option A is correct

Ans 1:

Naisha Gupta from DPS School, Khajaguda, Hyderabad

Class : Class 4

A

Ans 2: (Master Answer)

from ,

Class :

A

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Ibrahim Aslam from uttam, Ghaziabad

Subject :NSO Class : Class 4

What is common among the given planets?
1. They are made up of frozen gases.
2. They are made up of rocks and iron.
3. They are neither hot nor cold.
4. They all have Moons.

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

There in the solution there is Pluto,but Pluto does not exist!

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Ans 1:

dveep jain from mindful gurukul, Mumbai

Class : Class 4

Answer is a

Ans 2:

Ibrahim Aslam from uttam, Ghaziabad

Class : Class 2

Ans 3:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida

Class : Class 7

Don't get it!

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Sanskriti Nagar from Rose Bud Academy, khagaria

Subject :NSO Class : Class 5

Which of these is a correct match?

A
B
C
D

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Ans 1: (Master Answer)

from ,

Class :

A

Options A, B, C and D show ploughing, sowing, spraying pesticide and harvesting respectively.

Ans 2:

Reyansh Garg from Lotus Valley International School, Noida Extention

Class : Class 7

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Sanskriti Nagar from Rose Bud Academy, khagaria

Subject :NSO Class : Class 5

Who hasg ot the international rank1 i want to know

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krish Singla from DELHI PUBLIC SCHOOL, BATHINDA

Subject :NSO Class : Class 9

A cation M and an anion N have the following composition:

M and N form a compound with formula M₃N₂. p, q, r and s are respectively ________.

A11, 12, 13, 28
B10, 11, 13, 27
C13, 11, 12, 25
D10, 11, 13, 28

i didnt get this ques how sodium will gain 3 electrons

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Ritvija Jaiswal from Sanawar an Institute for children, Bathinda

Subject :NSO Class : Class 4

During her summer vacations, Nishtha is going to a place where stilt houses and floods are very common. Which of the following should she preferably pack in her luggage?

A
B
C
D

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Ans 1:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi

Class : Class 7

D

Ans 2:

Ishaan Singh from BBPS, Gurugram

Class : Class 9

The correct answer is C.

Ans 3:

Ritvija Jaiswal from Sanawar an Institute for children, Bathinda

Class : Class 10

Ans 4:

saketh from VIBGYOUR HIGH ,BTM layout Bangalore, Bangalore

Class : Class 4

c

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Bhagyesh Kamal from DPS, Mumbai

Subject :NSO Class : Class 8

Refer to the given figures, P and Q.

How do reproductive cells produced in P differ from those produced in Q in terms of production and their modes of storage?

A Mature cells of P can get stored for longer periods in reproductive tract whereas in Q, only immature cells remain stored.
B P produces fewer reproductive cells than Q does.
C Reproductive cells produced by P do not show motility.
D Q produces reproductive cells for a longer period in an individual’s life span than P does.

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NAMAN HARITASH from DPS DLF CITY, GURGAON

Subject :NSO Class : Class 8

Why is the switch for any electrical appliance in ac circuit always connected to the live wire?

A No current flows in the neutral wire.
B There will be a short circuit if the switch is in the Earth lead.
C The device can be switched off easily if the switch is in the neutral lead.
D The device can be isolated (mode safe) if the switch is in the live lead.

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Ans 1:

Siya Aneja from Tagore International , SOUTH DELHI

Class : Class 8

(D)

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NAMAN HARITASH from DPS DLF CITY, GURGAON

Subject :NSO Class : Class 8

Which of the following is correct?

A Water can be used for extinguishing fires caused due to electrical faults.
B Carbon is a non-metal so it cannot be used in electrolytic cell.
C A liquid conducts electricity because of the presence of ions.
D Pure water forms ions to conduct electricity.

answer shall be c

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Ans 1:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

Ans 2:

NAMAN HARITASH from DPS DLF CITY, GURGAON

Class : Class 9

c

Ans 3:

Parth Dhondiram Gadgile from Narayana international school Loha Dist. Nanded, Parbhani

Class : Class 8

D is right ans guys

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Dushyant Singh from Shri Ram Centennial School, Indore

Subject :NSO Class : Class 5

A housewife was preparing hot meal for her family. She accidentally placed her fingertip into some boiling soup, but quickly withdrew it. She felt significant pain in the finger immediately after that. Which of the following is the most likely explanation for this time lag?

A The withdrawal of her finger is a reflex action that is triggered more quickly than the transmission of information related to pain stimulus to her brain.
B The pain receptors present on her finger skin are less efficient, so information regarding pain is transmitted to brain at a slower rate as compared to that of heat.
C The withdrawal of her finger is controlled by brain so it occurs very fast whereas feeling of pain is a reflex action controlled by spinal cord so it takes comparatively much more time.
D None of these

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Ans 1:

Sanskriti Nagar from Rose Bud Academy, khagaria

Class : Class 5

A is the correct answer

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