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Vivek Gulavani from Innisfree House School, Bengaluru
Subject :NSO    Class : Class 7

A student took an iron rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the iron rod does not burn whereas the one around the wooden rod catches fire. It is because


A Candle, in case of iron rod, is nearer to the paper
B Wood being a bad conductor of heat, takes away all the heat
C Iron being a good conductor of heat, conducts away the heat given to the paper
D Paper, in first case, is thicker.


could someone please explain the answer

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

Post Your Answer

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:

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

Ans 2:

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.

Post Your Answer

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: (Master Answer)

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

Ans 2:

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

Ans 3:

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

Post Your Answer

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

Ans 1:

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 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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 10:

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 11:

Ashwak from Cambridge, Jalandhar
Class : Class 8
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 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

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

Ans 16:

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 17:

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

Ans 18:

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 19:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 6

Ans 20:

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

Ans 21:

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

Ans 22:

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

Ans 23:

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

Ans 24:

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

Ans 25:

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 26:

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

Ans 27:

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

Ans 28:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 9
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 29:

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

Ans 30:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Answer is D

Ans 31:

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

Ans 32:

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

Ans 33: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 34:

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 35:

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

Ans 36:

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

Ans 37:

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

Ans 38:

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

Ans 39:

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

Ans 40:

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

Ans 41:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Explain this dumb question and an even dumber answer " Master Answer"

Ans 42:

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

Ans 43:

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

Ans 44:

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

Ans 45:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 6
CHILL PPL CHILL

Ans 46:

Thejaswini from Rajagiri, Chennai
Class : Class 7

Post Your Answer

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

Ans 1:

sk from psbb millennium school, Chennai
Class : Class 9

Ans 2:

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

Ans 3:

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 4:

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

Ans 5:

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

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
answer is b

Ans 8: (Master Answer)

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

Post Your Answer

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

Ans 1: (Master Answer)

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

Ans 2:

Malav patel from Navrachana school sama , Vadodara
Class : Class 4
A is the correct answer as 1 and 2 are correct

Post Your Answer

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

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 8
I too

Ans 2:

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

Ans 3:

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

Ans 4: (Master Answer)

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

Ans 5:

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

Ans 6:

Soham Yadav from Delhi Public School Rohini ,New Delhi, New Delhi
Class : Class 8
obviusly it will be d

Post Your Answer

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

Ans 1:

Mahima g pillai from Arya central school, Trivandrum
Class : Class 6
A

Post Your Answer

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