National Science Olympiad Forum By SOF Olympiad Trainer - Page 668
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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:

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 3:

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

Ans 4:

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 5:

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

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from , Kolkata
Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

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.

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

Ans 1:

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

Ans 2:

Divij Narang from ,
Class : Class 9

Ans 3:

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 4:

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

Ans 5:

Student from School, City
Class : Class 8

Ans 6:

Soham from Vibgyor high, Pune
Class : Class 8

Ans 7:

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 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:

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

Ans 2:

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

Ans 3:

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 4:

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

Ans 5:

Paarth Vashistha from Kunskapsskolan Gurgaon , Gurgaon
Class : Class 8

Ans 6:

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

Ans 7:

Aadavamoorthy from Advaith International Academy, Hosur
Class : Class 9

Ans 8:

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

Ans 9:

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

Ans 10:

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

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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 12:

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

Ans 13:

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 14:

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

Ans 15:

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 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:

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

Ans 18:

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

Ans 19:

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 20:

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

Ans 21:

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

Ans 22:

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

Ans 23:

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

Ans 24:

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

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

Ans 1:

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

Ans 2:

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 3:

arsh from nps, bangalore
Class : Class 4

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

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

Ans 16:

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

Ans 17:

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

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

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

Ans 22:

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

Ans 23:

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

Ans 24:

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

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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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Bhabani Prasad from Narayan School, Kolkata
Subject :NSO    Class : Class 5

Ans 1:

Kashvi Sharma from Jankidevi Public School , Dausa
Class : Class 9
Yes,In the book it is said that the patient should be made sit and lean forward not backward and patient should be told to pinch the sides of the nose together. So the answer should be C.

Ans 2:

Gauri Singh from St. John's School, Marhauli, Varanasi
Class : Class 10
Option C is right

Ans 3:

A Andrew from Lalaji Memorial Omega International School, Chennai
Class : Class 5
yes. Gauri Singh is right . option c is right .

Ans 4:

Jasmine Kaur from Venkateshwar International School , New Delhi
Class : Class 5
On page 75 of "Learning Science for Smarter Life" for class V it is mentioned that person should sit down and lean forward. It also says to pinch the nose.All answer choices of this question are therefore incorrect.

Ans 5:

Siddhanth Subramanian from Global Indian International School , Singapore
Class : Class 7
option c is correct

Ans 6:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
Answer B is right because if you refer to the 4th grade book, the first point written is to tilt your your head back

Ans 7:

likith from Delhi Public School International School, Singapore
Class : Class 7
Option C is correct

Ans 8:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
option c is correct

Ans 9:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8

Ans 10:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
i agree with Gauri Singh and Kashvi Sharma

Ans 11:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
option b is correct because by sitting with his head facing up wards would take the blood flow downside

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DIBYAJYOTI ROUTRAY from Stewart school, Cuttack
Subject :NSO    Class : Class 6

Ans 1:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 2:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 3:

Pratheek from Null, Null
Class : Class 4
Acclimatization and adaptation mean two totally different things. Adaptation means permanent adjustment to our habitat whereas acclimatization means temporary adjustment to a place where we temporarily stay for some time and get used to. In my opinion, option A is the right answer.

Ans 4:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 5:

Pulkit Krishna from St. Paul's High School, Hajipur
Class : Class 6
The answer is A. You should Read the book twice again. But even then also you think that the answer is B than the book is a spam. Adaptation is the permanent feature of an organism which helps it to survive in its habitat, while acclimatisation is a temprory feature or change in feature of an organism which helps it to survive in any other place rather than its habitat......................................................................

Ans 6:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 7:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 8:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 9:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 10:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 11:

Pratheek from Null, Null
Class : Class 4

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Saksham Kaushal from Ahlcon International School, Delhi
Subject :NSO    Class : Class 5

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