National Science Olympiad Forum By SOF Olympiad Trainer - Page 114
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Rishab Murthy from Birla Public School , Doha
Subject :NSO    Class : Class 4

Ans 1:

Rishika Raj Sinha from Delhi World Public School, Noida Extension
Class : Class 9
the answer is d

Ans 2:

Suharto from Springdale High School , Kalyani
Class : Class 4
It's D

Ans 3:

Aayansh Bhatnagar from Apeejay School, Noida, Noida
Class : Class 4
it should be D

Ans 4:

Vaajith from THE ELEGANT PUBLIC SCHOOL, Palakkad
Class : Class 4
Yes, it is D, but they are saying it is C.

Ans 5:

from ,
Class :
yes the answer is D

Ans 6:

Arshya from KV Meenambakkam, Chennai
Class : Class 7
YES , IT IS D

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Rohan David from Oakridge International school, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

Adarsh from DPS, Raipur
Class : Class 5
The correct answer is c

Ans 2: (Master Answer)

from ,
Class :
The correct answer is C.

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is C.

Ans 4:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
C C c everyone can seethe answer is Ceveryone plz agree

Ans 5:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
The correct option is c

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Aditya Avadhani from Deens Academy, ECC road, Whitefield, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Midhuna from ABCD, Banglore
Class : Class 3
Answer is C

Ans 2:

from ,
Class :
no no ans should be d because how will we get petrol

Ans 3:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7
D is the ans

Ans 4:

somesh from Centre point katol road, Nagpur
Class : Class 6
B

Ans 5:

Harshit from Montfort , Delhi
Class : Class 7
its c

Ans 6:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
Maybe dry cleans have a chemical that contains petrol for oil grease

Ans 7:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10
same

Ans 8:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7

Ans 9:

from ,
Class :
Actually fresh ink stains can be lighten by using talcum powder and in dry cleans stores petrol is used to remove oil and grease So from my side C is the answer

Ans 10:

Shivam Chablani from The Shriram Millenium School , Faridabad
Class : Class 5
The answer should be D

Ans 11:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is C

Ans 12:

SUHARSH SAXENA from dpsnoida, Noida
Class : Class 6
No d is not the answer I have google it it is showing g that a Is a bad idea

Ans 13:

Avya Pandey from NPS International, Singapore
Class : Class 8
it should be D

Ans 14:

Vidhya M from Vibgyor High Bannerghatta, Bangalore
Class : Class 7
I don't believe that fresh ink stains can be removed with talcum powder and oil and grease can be removed with petrol. I think the answer should be "D"

Ans 15:

avsonawane from Blue Ridge Public School, Pune
Class : Class 9
the correct option shall be "D". The answer marked in the system shall be reviewed...

Ans 16:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 17:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 8

Ans 18:

Aarav from SNBP, Pune
Class : Class 4
It’s c because talcum powder does work on fresh ink stains and petrol works on oil and grease everyone should know that cotton need soft detergent

Ans 19:

Sreejani Bhaduri from National Public School, Bangalore
Class : Class 10
Ps

Ans 20:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 6
Yes answer should be D because I also think like Vidhya M.

Ans 21:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Explanation please

Ans 22:

from ,
Class :

Ans 23:

from ,
Class :
yes ans should be d

Ans 24:

Gunnit Kant from DPS, Nerul, Navi Mumbai
Class : Class 7
c

Ans 25:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 26:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 27:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
Answer is most probably C

Ans 28:

SHUVRA MAITRA from THE HERITAGE , KOLKATA
Class : Class 4

Ans 29:

Samarth Vijay Yeliathaya from Shri Kumarans Children home,cbse, Bangalore
Class : Class 5
Even I thought 'D' is the answer

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from ,
Subject :NSO    Class : Class 4

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Navneeth Reejish from Yuvabharati International school, Singapore
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

from ,
Class :
The correct answer is C.

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from ,
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

from ,
Class :
The correct answer is D.

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Ambit Biswas from Oriental Public School, Kalyani, Kalyani
Subject :NSO    Class : Class 4

Ans 1:

from ,
Class :
ans:none of these 365 days 6 hours

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OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Subject :NSO    Class : Class 4

Ans 1:

from ,
Class :
Its D

Ans 2:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
d is the answer

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
please help help master answer explain

Ans 4:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7
Can you tell the answer to this question

Ans 5: (Master Answer)

from ,
Class :
The correct answer is A.

Ans 6:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
it's 'd' or 'a'..... not sure

Ans 7:

from ,
Class :
not sure

Ans 8:

from ,
Class :

Ans 9:

from ,
Class :
The Correct Answer Is A

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from ,
Subject :NSO    Class : Class 4

Ans 1:

from ,
Class :
HOW MANY SQUARES ARE THERE AND GIVE SOLUTION

Ans 2:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
i cant count please give solution

Ans 3:

arpita Jaiswal from bhartiya vidya bhavan, wardha
Class : Class 4
Please give solution

Ans 4:

from ,
Class :
This answer should be three.

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Pratibha from Vaels billabong international, Chennai
Subject :NSO    Class : Class 4

Ans 1:

from ,
Class :

Ans 2:

Abhigyan Sinha from Podar International School, Powai, Mumbai, Mumbai
Class : Class 7
correct answer is C

Ans 3:

Rishaan Dixit from DPS Noida, Noida
Class : Class 6
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 4:

Manan thorat from Podar powai, Mumbai
Class : Class 4
The answer is C

Ans 5:

Gurnoor from Chitkara International School, Chandigarh
Class : Class 5
ans is c

Ans 6:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
C

Ans 7:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 8: (Master Answer)

from ,
Class :
The correct answer is C.

Ans 9:

Aarush Pandya from Inventure Academy, Bangalore
Class : Class 8
The correct answer is C because if organism X wipes out all tadpoles in the community, then water insects' population grows with nothing to eat them. The small fish die because they have nothing to eat, and soon the big fish die too.

Ans 10:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Ans 11:

Manjeet Prajapati from Saint Xavier College BHEL Jhansi , Jhansi
Class : Class 4
In the given food chain, tadpole feeds on water insect and in turn is eaten by small fish. If population of tadpole will decline with time then small fish population will also decrease as former is the food of later. On the other hand, water insect population will be positively affected because in the absence of predator prey population reproduces and flourishes.

Ans 12:

k tagore from montessori school, KURNOOL
Class : Class 3
The correct answer is c

Ans 13:

Priyanshi from Delhi Public School, Gurugram
Class : Class 4
the correct answer is C

Ans 14:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Aarush , there will be not enough plants to feed so many water insects . So, at a particular time all plants will finish . So , there will be nothing left for the water insects so they will also die !

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