National Science Olympiad Forum By SOF Olympiad Trainer - Page 428
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shreyash rawat from podar international school, pune
Subject :NSO    Class : Class 4

Ans 1:

Riddhima Pandey from Chinmaya Vidyalaya, Bokaro Steel City
Class : Class 3

Ans 2:

Khanak Jha from Prime Academy, Mumbai
Class : Class 4
how do you know that Kavan knows the correct answer

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Kanav , if you know the answer then why have you posted it on the forum ?

Ans 4:

Kavin from ISG , Muscat, Muscat
Class : Class 5
white you are rude for sure and it IS b

Ans 5:

Vidit Dubey from Gundecha Education Academy, Mumbai
Class : Class 7

Ans 6:

Harshit from Montfort , Delhi
Class : Class 7
is is b how

Ans 7:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
option B

Ans 8:

Aananya Singh from DPS East, Bangalore
Class : Class 4

Ans 9:

Aananya Singh from DPS East, Bangalore
Class : Class 4

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Anuj Sandesh Kanekar from Shrimant Maisaheb Bavadekar Academy, Kolhapur
Subject :NSO    Class : Class 6

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Pragun goel from Venkateshwar International School, Delhi
Subject :NSO    Class : Class 5

Ans 1:

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 2:

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

Ans 3:

RISHABH SAHOO from DAV PUBLIC SCHOOL UNIT 8 BHUBANESWAR, BHUBANESWAR
Class : Class 4
Answer is wrong

Ans 4:

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 5:

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 6:

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

Ans 7:

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

Ans 8:

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

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:

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

Ans 11:

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

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

Ans 1:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 7
The correct answer is C.

Ans 2:

Advait Apte from SSRVM, Pune
Class : Class 4

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

Advait Apte from SSRVM, Pune
Class : Class 4

Ans 8:

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

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

Read the given statements and select the correct answer.
Statement 1 : The distance x at which a car can be stopped by applying brakes depends on the initial velocity.
Statement 2 : Mass of the car has no role to play.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.


mass of the car has role to play due to momentum.

Ans 1:

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 2:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8
C only

Ans 3:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8
No b is only

Ans 4:

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 5:

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 6:

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

Ans 7:

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 8:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8
Yes

Ans 9:

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 10:

ALICE from Delhi Public School, UDAIPUR
Class : Class 8

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

Besides the arrangement as shown in the given set-up, what other arrangements must be made to test for the presence of starch in the leaves X and Y ?


A The plant should be destarched first and then used for the experiment.
B The plant should be placed in continuous light for 2-3 days prior to experiment.
C On leaf Y, iodine solution should be put on while leaf X should be used as control without iodine application.
D None of these


I suppose it should be placed in dark for destarching and then in sunlight for testing whether the plant can perform photosynthesis in absence of CO2..

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 7
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 5:

kartick Somasundaram from san academy, chennai
Class : Class 1
option B

Ans 6:

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

Ans 7:

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:

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

Ans 3:

Haris from Deens academy , Banglore
Class : Class 5
b

Ans 4:

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

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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 correct answer

Ans 2:

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

Ans 3:

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

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 5:

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

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

Refer to the given figure and select the incorrect statement.

(i) S is the coloured circular part of the eye.
(ii) P is the outermost part of eye and it maintains the shape of the eyeball.
(iii) Q is a layer of light sensitive receptors at the back of the eye.
(iv) R carries message from eye to brain.
(v) T is the folded skin above eye which protects eye from dust, durt, etc.

A (i) and (ii) only
B (ii), (iii) and (iv) only
C (i) and (v) only
D (ii), (iv) and (v) only

Ans 1:

Mehar from NCS, Vasco
Class : Class 5
please explain

Ans 2:

niuv from meridian, Hyderabad
Class : Class 6

Ans 3:

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

Ans 4:

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

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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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