National Science Olympiad Forum By SOF Olympiad Trainer - Page 664
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Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Praveen Rai from Lotus Valley International School, Noida
Class : Class 7

Ans 2:

saikrishna from bharatiya vidhya bhavans public school, Hyderabad
Class : Class 9
can someone explain why?

Ans 3:

Aksh Swarnkar from National Center for Excellence CVR, Bangalore
Class : Class 8

Ans 4:

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

Ans 5:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 8

Ans 6:

Harshdeep roy from Bhavans School , Nagpur
Class : Class 7
answer is option c

Ans 7:

Parshti Bajpai from Modern Public School, ALWAR
Class : Class 7
Please explain it to me.

Ans 8:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
ans is option C

Ans 9:

Lakshya Vijeta from Afgji, New Delhi
Class : Class 8
Option D is correct. I dont know why. Please explain

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Pradhyumna from J S S Public School, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
jk kj;

Ans 2:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
Not kerwa its kewra. It is an extract that is distilled from the flower of the Pandanus plant. Kewra water is very similar to rosewater. It is used to flavour South Asian cuisine.

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SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Subject :NSO    Class : Class 6

Ans 1:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
As it goes up,kinetic energy decreases due to gravity while potential energy increases with height. As it comes down, kinetic energy increases due to gravity while potential energy decreases.

Ans 2:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it will be maximum near the ground

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SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Subject :NSO    Class : Class 6

Ans 1:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
it will be maximum near the ground

Post Your Answer

Prasuk Jain from Modern Delhi Public School, Faridabad
Subject :NSO    Class : Class 7

Saurabh burned two different fibres X and Y in order to identify them. X smelt like burning paper while Y smelt like burning hair. Which of the following options correctly identifies the two fibres?


Ans 1:

Aksh singh from The asian school, Dehradun
Class : Class 7

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 3:

Ishaan Roy from Sri Chaitanya Techno School, Bengaluru
Class : Class 10

Ans 4:

Aparajita Biswas from Don Bosco School Silchar, SILCHAR
Class : Class 7
THE CORRECT ANS IS OPTION C

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Pulkit Gupta from Maxfort School, New Delhi
Subject :NSO    Class : Class 6

Ans 1:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
i mean except Satwik

Ans 2:

Advik from DPS Patna, Patna
Class : Class 4
its got to be ddddd!!

Ans 3:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
D is the ans as air is matter and is very transparent.

Ans 4:

Mitra Maiti from Techno India Group Public School, Bolpur Prantik
Class : Class 6
It is true that air is a perfectly transparent object. It neither absorbs nor reflects light. It transmits whole of light. So, all the options are correct and answer is D.

Ans 5:

khushi Joshi from Svkm , Mumbai
Class : Class 10
Ans is D as air is all of the above

Ans 6:

arnav santosh shinde from new english school , landewadi
Class : Class 4
ANS IS D

Ans 7:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
Answer is D as air it neither absorbs or reflects light,its almost transparent,it transmits the whole of light.

Ans 8:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
i agree with d

Ans 9:

Agrim Jai from Modern Bharakhamba, Delhi
Class : Class 7
D

Ans 10:

Anika Saha from New Town School, KOLKATA
Class : Class 6
ANS IS D

Ans 11:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
ans is d

Ans 12:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
@ashwak control your language

Ans 13:

Shruti Rajshree from NPS Indiranagar, Bengaluru
Class : Class 3
answer is B as given in the answers. there is a solution too

Ans 14:

Parth Kaushish from MDPS, Faridabad
Class : Class 6
its D come on two total mistakes in one test

Ans 15:

Thejaswini from Rajagiri, Chennai
Class : Class 7

Ans 16:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
The answer is 'D' option, 'All of the above'. It is so because Air is not visible because it neither absorbs nor reflects light, it transmits whole of light. Dust particles in air is visible as they reflect light. Air is almost transparent substance. It is not dust to be visibile. It is air, it is completely transparent.

Ans 17:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
I agree with everyone is Satwik because air trasparent it neither reflects nor absorbs light and trasmits whole of light So ans is D

Ans 18:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 19:

Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Class : Class 9
I think its D not B

Ans 20:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
these days sof olympiad trainer has gone mad. in one test, i got 4 perfectly wrong question . and now this . this adds up to fivei do not know what is the problemans should be ddddddddd!!!!!

Ans 21:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7
CHILL PPL CHILL

Ans 22:

Aarav Garg from DPS Greater Noida, Greater Noida
Class : Class 7
It should be d but they are telling its b.

Ans 23:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 24:

Devdarsh hero from HOLY GRACE, Mala
Class : Class 6
ans is D

Ans 25:

Videh Jain from Bluebells School International, Delhi
Class : Class 6
d is the ans

Ans 26:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
THE ANSWER IS D

Ans 27:

Arsh from Lahs, Gwalior
Class : Class 3
ans is d sof !!!!!!!!!!!!! ans is d

Ans 28:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
sof the answer is ddd so many times i am really fed up of your wrong answers and that is really very shamful on you.

Ans 29:

Ashwak from Cambridge, Jalandhar
Class : Class 9
What in the freaking world . I am surprised that these dumb idiots can even host international and national olympiads . Even a 5 year old could get the answer right . I won't be surprised if they give the answer 22 of the question 2 2 . I am telling you we are wasting money on these damn question papers

Ans 30:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 31:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Explain this dumb question and an even dumber answer " Master Answer"

Ans 32:

malhar thorve from city internqtional school, satara road, pune
Class : Class 7

Ans 33:

ARAMINTA SAHA from VIBGYOR HIGH BALEWADI, PUNE
Class : Class 6
ans is d because it is transparent which allows light to pass, it doesn't observe light but transmits all light

Ans 34:

kpks14 from RIMT World School, Chandigarh
Class : Class 7
d is the answer but the trainer is showing b as answer air reflects light that is why the sky is blue

Ans 35:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is D

Ans 36: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 37:

Ishayu Mukherjee from Don Bosco Park Circus, Kolkata
Class : Class 6
The answer is wrong. The correct answer is D

Ans 38:

Naisha from Brilliant public school b, Bilaspur
Class : Class 8
D

Ans 39:

AJAY LAHOTI from SPRINGDALES DUBAI, Dubai
Class : Class 6
I should be d

Ans 40:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 41:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Answer is d

Ans 42:

Karthik from Euro, Bengaluru
Class : Class 7
ans is d

Ans 43:

niuv from meridian, Hyderabad
Class : Class 6
ANS IS D

Ans 44:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 7
And is b

Ans 45:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
Answer is D

Ans 46:

Siddharth from DPS, Jodhpur
Class : Class 9
The correct answer should be option D, All of these

Ans 47:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7

Post Your Answer

Swati from Ryan, Bengaluru
Subject :NSO    Class : Class 8

Ans 1:

Harsh Kant from Gyan Ganga Educational Academy, Raipur
Class : Class 9

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

Ans 3:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
answer is b

Ans 4:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 5:

sk from psbb millennium school, Chennai
Class : Class 9

Ans 6:

chepz from abc school, pandikkad
Class : Class 10
The common error is to think that pressure at 0.4h above the surface of the reservoir of mercury is 0.4 times the atmospheric pressure. The pressure at p is caused by the weight of mercury above point P. Thus preesure at P is equal to : 0.6x 100000 = 60000 Pa

Ans 7:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
everybody just copy and paste it, can anyone explain in an easier way

Ans 8:

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

Ans 9:

Gokul Warrier M from SRI KUMARANS MALLASANDRA, BANGALORE
Class : Class 9

Post Your Answer

Mihir Arora from dpsg, ghaziabad
Subject :NSO    Class : Class 3

Ans 1:

Malav patel from Navrachana school sama , Vadodara
Class : Class 5
A is the correct answer as 1 and 2 are correct

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Post Your Answer

Harshita.B from Narayana e techno school, Poonamalle
Subject :NSO    Class : Class 3

Ans 1:

Karangat house from Navy Children School, Payyannur
Class : Class 3

Ans 2:

SHAUNAK from St Xaviers School, HAZARIBAG
Class : Class 3
The correct answer is D [friction].

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I too

Ans 5:

Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi
Class : Class 6
obviusly it will be d

Ans 6:

Thaneesha from Radcliffe School, Kharghar
Class : Class 7
Y...I DONT UNDERSTAND SOOOOO....................TELL MEH!!

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Kimaya and Sanaya from Ekya School, Bengaluru
Subject :NSO    Class : Class 3

Post Your Answer

X Y
(A) Wool Silk
(B) Cotton Rayon
(C) Cotton Silk
(D) Silk Wool