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arnav reddy from oakridge international school, hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Vineet Banode from New Horizon Scholars School, Thane
Class : Class 3

Ans 2:

akshitha from Euroschool, Bengaluru
Class : Class 3
all of these

Ans 3:

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

Ans 4:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 3
A is not correct D is correct

Ans 5:

MAYANK from Jain Public School, REWARI
Class : Class 5
D

Ans 6:

MAYANK from Jain Public School, REWARI
Class : Class 5
A

Ans 7:

Samik Praveen from Euro School Airoli, Mumbai
Class : Class 5
All of these

Ans 8:

Havi Jain from GEMS modern academy, Gurgaon
Class : Class 3
all of these option(D)

Ans 9:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 3
D is correct

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

Read the given data and select the correct option for the following questions.
Raman carried out an experiment to find out how fast water can pass through four different types of soil. He put each type of soil in four pots with equal sized holes at the base and placed separate dishes at their bottom to collect water. He poured water in them one by one, and used a stopwatch to record the time taken for water to reach the level he had marked same in each dish. His recording is given in the table as shown below.

What factors should Raman keep the same to ensure a fair test?
(i) The amount of soil
(ii) The size of the pot
(iii) The shape of the dish
(iv) The amount of water

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


How can it be a fair test if the amount of water varies

Ans 1:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
The amount of water also matters right

Ans 2:

Dhairya Vinayak from Loyola High School, Patna
Class : Class 8

Ans 3:

Anuraaj Salunkhe from St Gregorios High School, Mumbai
Class : Class 8

Ans 4:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
All the given factors are required for a fair test ; So option D would be the correct answer

Ans 5:

Palash sachin patel from Kips, Patan
Class : Class 8
d is correct answer

Ans 6:

shreya from GIIS, KualaLumpur
Class : Class 5

Ans 7:

Mehaan Bhatt from Pawar Public School , Mumbai
Class : Class 6

Ans 8:

septic pooper from dps gurgaon, Gurgaon
Class : Class 7
Water is also correct

Ans 9:

Tanmayi kiran giri from jwalamukhi public school, senapati
Class : Class 7
I do agree it's D

Ans 10:

Shriyans from DPS Agra, Agra
Class : Class 7
D

Ans 11:

Kamal Manchenella from Delhi Public School, Hyderabad
Class : Class 7
I feel that it is D

Ans 12:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 13:

Shubham Ashish Kulkarni from APEEJAY PITAMPURA, DELHI
Class : Class 8
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 14:

aditya ranjan from gyan niketan , patna
Class : Class 7
i think amount of water also nedd

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Aswath Krishna from DPS EAST, Bengaluru
Subject :NSO    Class : Class 6

A potter shapes pots out of clay (Process 1). He then bakes the pots in an oven (Process 2). Which of the following statements is correct?

A Process 1 is a reversible, physical change while process 2 is an irreversible, physical change.
B Process 1 is an irreversible, physical change while process 2 is an irreversible, chemical change.
C Process 1 is a reversible, physical change while process 2 is an irreversible, chemical change.
D None of these.


Is it A or C?

Ans 1:

VIJAYA SREYAS B from NARAYANA OLYMPIAD SCHOOL KUKATPALLY, HYDERABAD
Class : Class 6
C because we can get clay back from a wet pot by smashing it,but once it heats up, it dries the clay and makes it stone hard.

Ans 2:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru
Class : Class 6
on heating, the clay pot doesn't turn into stone,right?it doesn't change composition once heated , it is still clay ! answer is "A"

Ans 3:

D Murari from Indian School of Excellence, Bangalore
Class : Class 6
C,because- it is a chemical change. after baking we can break it into smaller particles but it won't form the same clay, with same properties again

Ans 4:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
A is the correct answer

Ans 5:

Archisman Rout from Podar International School, Powai
Class : Class 6
A is correct because it just turns hard but it is still clay only.And also chemical change doesn't mean that it is irreversible,Chemical change means that the identity of the substance we started with is lost.Here the identity is not lost.So A is correct.

Ans 6:

Anika Saha from New Town School, KOLKATA
Class : Class 6
The answer is A.

Ans 7:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6
answer is a

Ans 8:

ridhima from mdps, faridabad
Class : Class 6

Ans 9:

Vidula Malkar from DPYA High school, Mumbai
Class : Class 7
a is the correct answer because chemical composition dose not change

Ans 10:

Tanishtha from DPS, Greater Noida
Class : Class 7
c is the correct answer

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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:

Aarnavi Mann from Scholars rosary Sr. Sec. School, Rohtak
Class : Class 7

Ans 3:

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

Ans 4:

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

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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:

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:

from Sri Chaitanya Techno School, Bengaluru
Class : Class 9

Ans 2:

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

Ans 3: (Master Answer)

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

Post Your Answer

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

Ans 1:

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 2:

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

Ans 3:

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 4:

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

Ans 5:

Arsh from Lahs, Gwalior
Class : Class 8
ans is d sof !!!!!!!!!!!!! ans is d

Ans 6:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
only dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

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:

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

Ans 9:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 6
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 10:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4

Ans 11:

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

Ans 12:

Anshuman Mishra from kv no 3, Bhubaneswar
Class : Class 7

Ans 13:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6
i agree with d

Ans 14:

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

Ans 15:

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

Ans 16:

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 17:

arjun from the bishops school camp , pune
Class : Class 8

Ans 18:

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

Ans 19:

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

Ans 20:

khushi Joshi from Svkm , Mumbai
Class : Class 9
Ans is D as air is all of the above

Ans 21:

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

Ans 22:

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

Ans 23:

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

Ans 24:

Praneeth from Null, Null
Class : Class 7
Option D. All of the above.

Ans 25:

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

Ans 26:

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

Ans 27:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 6
Answer is D

Ans 28:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 29:

Siddharth from DPS, Jodhpur
Class : Class 4
The correct answer should be option D, All of these

Ans 30:

Naisha from Brilliant public school b, Bilaspur
Class : Class 6
D

Ans 31:

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 32:

Praneeth from Null, Null
Class : Class 7
Option D. All of the above.

Ans 33:

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

Ans 34:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
Answer is D

Ans 35:

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

Ans 36:

Videh Jain from Bluebells School International, Delhi
Class : Class 6
ddddddddddddddd

Ans 37:

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

Ans 38:

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

Ans 39:

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

Ans 40:

sujata patel from Podar International, Pune
Class : Class 6
dddddddddddddddddddddddddddddddddddddddddd!!!!!!!!!!!!!

Ans 41:

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

Post Your Answer

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

Ans 1:

Harsh Kant from Gyan Ganga Educational Academy, Raipur
Class : Class 8

Ans 2:

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 3: (Master Answer)

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

Ans 4:

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 5:

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

Post Your Answer

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