National Science Olympiad Forum By SOF Olympiad Trainer - Page 673
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H KRITHIK from kendriya vidyalaya, chennai
Subject :NSO    Class : Class 3

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
ans is c

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plug key is also a type of switch.

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Raghav Mittal from DAV Public School, ludhiana
Subject :NSO    Class : Class 5

Ans 1:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
c

Ans 2:

A Andrew from Lalaji Memorial Omega International School, Chennai
Class : Class 5
sedimentation and decantation is the answer . but filtration can not come because we can see in the picture itself that the particles are big ,that's why sedimentation and decantation . if the particles are small but yet insoluble , then only it is filtration . I hope that you understood.

Ans 3:

Shivangi from St. Michael's High School, Patna
Class : Class 5
Ya, filtration can also remove insoluble impurities but in this case sedimentation and decanation is more appropriate answer.

Ans 4:

Mallika Gupta from NPS indiranagar, Bangalore
Class : Class 9
it needs to be sedimentation and decantation because the insoluble material present in the liquid is quite heavy you only perform filtration when the particles float over the surface of the water

Ans 5:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 10
Yes, but in the given figure it is sedimentation

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
every single sound has its own secondary waves, so the correct option must be option C.

Ans 2:

RAHUL S ROY from ST.XAVIERS HIGH SCHOOL,VAPI, VAPI,GUJARAT
Class : Class 7
correct option is c

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Ethel shiju from National Public School Indiranagar, Bangalore
Subject :NSO    Class : Class 8

Ans 1:

Bhuvanesh Singla from SCTS, Bengaluru
Class : Class 8
Hi, the statement 2 is true but just tells about the type type combustion to which the reaction given in statement belong. it does not tell about actual cause of burning of phosphorus in air at room temperature. the reason for statement 1 is that phosphorus is a highly reactive element that's why burns in air at room temperature.

Ans 2:

stavya from dps noida, noida
Class : Class 8
the soultion is wrong beacuse the literal defination of spontaneous combustion tells us that it happens at room temprature without application of heat by external source

Ans 3:

Student from School, City
Class : Class 8

Ans 4:

Yash Bindal from Global Indian International School, Singapore
Class : Class 9

Ans 5:

Divij Narang from ,
Class : Class 9

Ans 6:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Actually, the solution is opposite to the correct answer

Ans 7:

Soham from Vibgyor high, Pune
Class : Class 8

Ans 8:

arnav from the gurukul, Panchkula
Class : Class 5

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Ethel shiju from National Public School Indiranagar, Bangalore
Subject :NSO    Class : Class 8

Ans 1:

MandarPalkar from KV DRDO, Bangalore
Class : Class 8
The protein requirement of mustard is fulfilled by the ribozome present in root nodules of soyabean?

Ans 2:

Sumedha Mishra from xyz, School, Pune
Class : Class 8

Ans 3:

SIDDHI SHREYASH from Phoenix Green International School , Hyderabad
Class : Class 9

Ans 4:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8
Think in the way of leguminous crops

Ans 5:

Sahasra Shanker from KV IIT, Chennai
Class : Class 6
yeah right Triguna!!! in both cases soybean is present? why so?

Ans 6:

Aadavamoorthy from Advaith International Academy, Hosur
Class : Class 9
Both Wheat and Maize require rotation of crops.

Ans 7:

Triguna from Kendriya Vidyalaya No.1 Salt Lake, Kolkata
Class : Class 8
Why so? In both the cases soybean is present.

Ans 8:

Aadavamoorthy from Advaith International Academy, Hosur
Class : Class 9

Ans 9:

Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Class : Class 8

Ans 10:

Anshuman D from MVM, Hyderabad
Class : Class 9
Supposed to be only ABecause mustard is a non leguminous plantEven it can be rotated with soyabean

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Anurag Basistha from Prudence School Dwarka 16 B, Delhi
Subject :NSO    Class : Class 6

Ans 1:

Arnav Raj Sharma from Dpsvk, Gurgaon
Class : Class 9
my laptop din't provide the options

Ans 2:

Riddhi from St Ursula high school, PIMPRI CHINCHWAD
Class : Class 6
No options

Ans 3:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
They did not provide options on my laptop but option C is correct.

Ans 4:

Naman from Svm, Nalasopara
Class : Class 6
options are missing

Ans 5:

Aniket Ghosh from DAV Public School Haldia, Haldia
Class : Class 9

Ans 6:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
NO OPYIONS!

Ans 7:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
They did not give options on my ipad .

Ans 8:

khushi Joshi from Svkm , Mumbai
Class : Class 10
They did not give the options on my iPad so I couldn't see which was the correct ans. something needs to be done about this problem.

Ans 9:

Bharat from Geetanjali Olympiad school, Bangalore
Class : Class 9
they did not give options

Ans 10:

Raghav from Shalom Hills International school, Gurgaon
Class : Class 6
They're not even giving me options

Ans 11:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
they didnt give the options

Ans 12:

Pulkit Krishna from St. Paul's High School, Hajipur
Class : Class 6
The shadow will be whole black as the book is an opaque object and will not allow any light to pass through it so on the screen it will form a shadow. And the rest that is the ring, no light will reach it thus how can its shadow be formed?

Ans 13:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF

Ans 14:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
They didn't give options

Ans 15:

Ishaan Mishra from Sai International School, Bhubaneswar
Class : Class 7
I typed in c. What is this?

Ans 16:

Kshitij from Sams, Bangalore
Class : Class 6
they MUST and SHOULD be more CAREFUL. No options??? Then, how should we answer their question??? they take no actions! look:-a person has commented a year ago but?NO RESPONSE

Ans 17:

Ahaan Pathak from Treamis World School, Bangalore
Class : Class 8
they didn't give the options to my computer

Ans 18:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
they should be more careful

Ans 19:

Ritika Bakshi from Techno India Group public School Hooghly, Chinsurah
Class : Class 7
Want option!

Ans 20:

Hamsavarshini Swaminathan from St Anns Senior Secondary School, Roorkee
Class : Class 10
iT IS NOT LAPTOP'S MISTAKE IT IS THE WEBSITE'S MISTAKE ITSELF.

Ans 21:

Souvik Bhattacharya from MVM, Hyderabad
Class : Class 10
I got the question with the options in my laptop. For those who did not get the options : it is the website's fault

Ans 22:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 10
they didn't given on question page so all my friends and I missed that question

Ans 23:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9

Ans 24:

Ankush Ghosh from DPS, Doha
Class : Class 10
no options

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Anshu Manglik from Delhi Public School, Gurgaon
Subject :NSO    Class : Class 4

Ans 1:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 7

Ans 2:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
d

Ans 3:

Saiesh from Sindhi high school, Bangalore
Class : Class 4
Correct answer is C

Ans 4:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8

Ans 5:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
ACTUALLY I DISAGREE WTH my PAST SELF SAYING c IT IS d

Ans 6:

Manan thorat from Podar powai, Mumbai
Class : Class 4
Its just sooo Confusing Tel the logi I dont understand!!

Ans 7:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
D is correct

Ans 8:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
correct ans is C

Ans 9:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow
Class : Class 7
c and d are both the answers i think

Ans 10:

Chinmay S Amboori from Adani Public School, Mundra
Class : Class 7
Answer should be C and D.

Ans 11:

Anjishnu Kamboj from ST.XAVIER SEC SE CO ed Bhopal, BHOPAL
Class : Class 5
Correct answer is D.Because insectivores plants can photosynthesise.

Ans 12:

Vibha from Birla Public School, Doha
Class : Class 7
THE CORRECT ANSWER IS D BECAUSE THEY NEED TO OVERCOME DEFICIENCY OF NITROGEN

Ans 13:

Brinda Modi from Orchids International School, Pune
Class : Class 6
Yes, it is a multiple answer question.

Ans 14:

arsh from nps, bangalore
Class : Class 4

Ans 15:

Pankaj Rajput from RBK GLOBAL SCHOOL, THANE
Class : Class 4
c

Ans 16:

Madhura Mageshwaran from zurich school, zurich
Class : Class 6
This is actually multiple Answer Q.It is silly!!!

Ans 17:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 9
B,Care correct as they can not do photosynthesis , uses his leaves to catch food

Ans 18:

Daksh Chanani from Sri Sri academy, Kolkata
Class : Class 7
c

Ans 19:

Rishi from Deens Academy, BENGALURU
Class : Class 9
B C D is the answers

Ans 20:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 9
I think Dalso

Ans 21:

Vrishank Sai Anand from GEMS Modern Academy, Dubai
Class : Class 9
the correct answer should be C

Ans 22:

Suniti Kumar Ghosh from Holy Angels' School, Katwa
Class : Class 8
Correct answer is, C

Ans 23:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
C

Ans 24:

Shreyansh Saha from Dps Megacity, Kolkata
Class : Class 6
Option D

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from Queen of angel, bharuch
Subject :NSO    Class : Class 3

Ans 1:

Shreya from RCIS , MY SORE
Class : Class 3
U

Ans 2:

Shreya from RCIS , MY SORE
Class : Class 3
U

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