National Science Olympiad Forum By SOF Olympiad Trainer - Page 540
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Pragun goel from Venkateshwar International School, Delhi
Subject :NSO    Class : Class 5

Ans 1:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
the options are wrong...... even the explaination is wrong

Ans 2:

ADRIJA SAHA from DPS RANIPUR, Haridwar
Class : Class 6
I think answer is wrong. Shivani is also right. Using a tourniquet prevents the poisoned blood from reaching the heart.

Ans 3:

Reyansh Arora from The ShriRam Millenium, Noida
Class : Class 5

Ans 4:

Rajrupa and Aparupa from Oxford cbse, bangalore
Class : Class 6
answer is wrong it should be c

Ans 5:

Bhavya Agrawal from Cambridge Court High School , JAIPUR
Class : Class 8

Ans 6:

Prerona Chatterjee from Delhi Public School North Kolkata, Kolkata
Class : Class 5
answer is ok.

Ans 7:

RISHABH SAHOO from DAV PUBLIC SCHOOL UNIT 8 BHUBANESWAR, BHUBANESWAR
Class : Class 7
Answer is wrong

Ans 8:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
Answer is wrong, Souvik is saying 'avoid' while the answer is giving a different explanation .All Samrak, Souvik and Shivani are wrong.

Ans 9:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
answer is wrong because if we apply tourniquet it may damage the nerves. the poison will remain its place but it may kill all the cells there

Ans 10:

Riya Gupta from Birla Divya Jyoti, Siliguri
Class : Class 8
OPTION OF ANSWERS ARE WRONG. SIMMI AND SAMRAT HAVE MADE WRONG STATEMENT

Ans 11:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6
I think answer is wrong , use of tourniquet was preferred method until few years ago , it has been found it can damage blood flow and nerves

Ans 12:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
souvik is saying 'avoid giving water to the person in case of poisoning so the poison does not spread in the body. and tying torniquet just above the wound will spread the poison more. so, the answer should be C

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Advait Apte from SSRVM, Pune
Class : Class 4

Ans 2:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4
online document so C

Ans 3:

Advait Apte from SSRVM, Pune
Class : Class 4

Ans 4:

Daksh Singh from Sanskrit School Undri , PUNE
Class : Class 3
The correct answer is C

Ans 5:

Avyukta Saraswat from St Francis School , Greater noida west
Class : Class 3
how can we send parcels on e-mail

Ans 6:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
C

Ans 7:

Daksh Singh from Sanskrit School Undri , PUNE
Class : Class 3
your answer is right

Ans 8:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 9
The correct answer is C.

Ans 9:

Havi Jain from GEMS modern academy, Gurgaon
Class : Class 8
C

Ans 10:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4

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SATYAM SATAPATHY from ODM PUBLIC SCHOOL BHUBANESWAR, BHUBANESWAR
Subject :NSO    Class : Class 7

Ans 1:

Soham Dighe from DAV Boys Senior Secondary School Gopalapuram Chennai, Chennai
Class : Class 8
C should be the correct answer. Same has been explained in the solution also.

Ans 2:

Pranav Prakash from SSSVV GAIL Vijaipur, Guna
Class : Class 9
Apropos to the question the mass of the car has a role in the momentum of the car, as Momentum=mv ,therefore option 'C' should be the correct answer.

Ans 3:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9
No b is only

Ans 4:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9
Yes

Ans 5:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9

Ans 6:

Jeevika from St Marys , Titardi , Udaipur
Class : Class 4
if you read the solution properly it is quite clear that the answer is b

Ans 7:

TRIYA SOUMIK NATH from SYMBIOSIS PRIMARY SCHOOL, PUNE
Class : Class 6
Though it looks like mass has no role to play in braking distance, actually coeff of friction (COF) between tyre and road surface has inverse relationship with braking distance. COF depends on normal force due to weight of vehicle and therefore indirectly mass plays a role on braking distance. The correct answer should be C

Ans 8:

ALICE from Delhi Public School, UDAIPUR
Class : Class 9
C only

Ans 9:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4
C is the correct answer. Force is applied to stop the vehicle. The formulae of force is mass * acceleration. Acceleration is final velocity - initial velocity by time. F= M*{(v-u)/t} and its kinetically equation is F=M *[v square - u square/ 2 * distance]. Which ever formula for force has been taken MASS is important. So clearly MASS HAS A ROLE TO PLAY. hence the answer must be C

Ans 10:

Raavi from DPS, Ranchi
Class : Class 8
c is the correct answer and solution is also given in favour of option c. but answer is b

Ans 11:

Anu Aarna Jagadeesan from Don Bosco School of Excellence, Chennai
Class : Class 5

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Anshuman D from MVM, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Karan Oberoi from Amanora School, Pune
Class : Class 8
Destarching of leaf is a more effective way so option A should be correct

Ans 2:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
The leaves should be destarched first, so that there is no presence of starch prior to the experiment in any of the leaves. In that manner, the experiment will be more clear. Therefore, Option A is also a potential answer.

Ans 3:

KHYATI LAKHCHAURA from MVN, FARIDABAD
Class : Class 8
it should be destarched first then keep the setup in sunlight because if we will directly test the presence of starch both the leaves will show blue -black color as there will be starch already present in both of them. So the correct answer should be OPTION A

Ans 4:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option b

Ans 5:

kartick Somasundaram from cps, chennai
Class : Class 3
option B

Ans 6:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option b

Ans 7:

Anish Ranjan Senapati from V S VIDYALAYA, KORAPUT
Class : Class 5

Ans 8:

Derek from Arsha vidya Mandir, Chennai
Class : Class 7
It should be destarched first

Ans 9:

Rohan A Gowda from Jnana Sagara International Public School, Channarayapatna
Class : Class 8
The plant should be destarched first and then used for the experiment To accurately test for the presence of starch in leaves X and Y.

Ans 10:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option b

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Yatindra G from SBOA, Chennai
Class : Class 4
B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 2:

Haris from Deens academy , Banglore
Class : Class 5
b

Ans 3:

Haris from Deens academy , Banglore
Class : Class 5
all the questions answer is b

Ans 4:

SRIRAM SRINIVASAN PAKU from KENDRIYA VIDHALAYA ASHOK NAGAR, CHENNAI
Class : Class 6

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Shreetej from Pearson public school, Pune
Class : Class 5
D is the answer

Ans 2:

Shubhank Mittal from Lotus Valley International School, Noida
Class : Class 5

Ans 3:

Shreetej from Pearson public school, Pune
Class : Class 5
d is correct answer

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 5:

Sanskriti Nagar from Rose Bud Academy, khagaria
Class : Class 5
D

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

niuv from meridian, Hyderabad
Class : Class 6

Ans 2:

CHIRAG KHORIA from EVERGREEN PUBLIC SCHOOL, MAYNAGURI
Class : Class 5
tough one,i think the explanation is:S is lens and that part is not colored and t is either eye lids or cornea and neither of them is folded skin.acoording to me

Ans 3:

Anya the IEO prodigy gymnast from Gopalan International School, Bengaluru
Class : Class 4
very tough though the ans is c

Ans 4:

Mehar from NCS, Vasco
Class : Class 5
please explain

Ans 5:

Soham from DPS Whitefield, Bangalore
Class : Class 4
wrong answer

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Adyasha Senapati from Gopalan International School, Bangalore
Class : Class 6
What's the Correct answer?

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Ans 2:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Ans 3:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
both answers b and c are not advisable

Ans 4:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Post Your Answer

Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

PARUL GHARSE from Vibgyor, Mumbai
Class : Class 6

Ans 2:

Devina kashyap from TPS, Mumbai
Class : Class 4

Ans 3:

Vallabh Agrawalla from Sai International School, Bhubaneswar
Class : Class 8
After unscrambling the four jumbled words. We get, Sedimentation, Chlorination, Distillation and Filtration. Filtration and Sedimentation are methods of removing insoluble impurities. Distillation is the only option that is used to remove soluble impurities.

Ans 4:

Devina kashyap from TPS, Mumbai
Class : Class 4

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