National Science Olympiad Forum By SOF Olympiad Trainer
  1. Home
  2. /  Forum

User Forum

Ask Your Question
arijit paul from New Town School, Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Khwahish Sharma from Oakfield Public School , Jaipur
Class : Class 7
The answer should be C because during the last 10 seconds [ 40 second ] the distance is 10 meter not 5 meter.

Ans 2:

Neevedita Singh from Auxilium Convent School Dum Dum, Kolkata
Class : Class 7
A

Post Your Answer

Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 3

Ans 1:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
They are right it should be [B] .

Ans 2:

Sreenath from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 5
Tailor bird that is A

Ans 3:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7

Ans 4:

Jibran Noorshah from Mount Litera Zee School, Bengaluru
Class : Class 4
WHAT!!!!!! IT SHOULD BE (A).

Ans 5:

Aditi Mahanti from DPS North Kolkata, Kolkata
Class : Class 3
It should be a tailorbird

Ans 6:

Shiven Dinkar from DPS NOIDA Sector 30, Delhi
Class : Class 4
what????

Post Your Answer

Shreesh Panigrahi from St. Xavier's High School, Kedargouri Bhubaneswar
Subject :NSO    Class : Class 8

Ans 1:

Subash kandoth from New horizon public school , Navi Mumbai
Class : Class 10
TBH2VI http://www.LnAJ7K8QSpfMO2wQ8gO.com

Post Your Answer

Ankit Nandy from Lawrence High School, Bangalore
Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Alpha, Beta, Gamma in ascending order.

Alpha particles leaves the nucleus of an unstable atom at a speed of 16,000 kilometres per second, around a tenth the speed of light.
Beta particles travel at a speed of 270,000 kilometres per second, around 98% of speed of light.
Gamma particles travel at the speed of light.

Post Your Answer

Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Ans 1:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
question, answer and solution is wrongall the options are showing the difference on heating

Ans 2:

Deepak Vijayaragavan from Greenwood High, Bengaluru
Class : Class 4
Please change it. It is correct in NSO book like Harish Divakar said

Ans 3:

Arpit Pratap Singh from Delhi Public School Bangalore North , Bengaluru
Class : Class 7
you are right vaibhav all are wrong

Ans 4:

Mahati p from cornerstone the public school, deepthi sreenagar colony hyderabad
Class : Class 6
All the options are totally wrong, please change them

Ans 5:

Archit Borkar from Whitefield Global School, Bengaluru
Class : Class 5
wrong options

Ans 6:

Prashanth from Gems Modern Academy, Dubai
Class : Class 5
SHOULD HAVE BEEN SPECIFIC WITH RESPECT TO X AND Y MARKING

Ans 7:

Kaashvi Sharma from Bal Bharati Public School, GRHM, New Delhi
Class : Class 6
if an object is cooled down the molecule structure changes from loosely packed to tightly packed. therefore none of the options is correct

Ans 8:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
PLS. CORRECT

Ans 9:

monisha garg from carmel convent school sector 9 chandigarh, panchkula
Class : Class 4
all options are wrong

Ans 10:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
ALL ARE WRONG

Ans 11:

Inakshi Dev from Hemsheela, Kolkatta, Kolkatta
Class : Class 4
Are B, C, D correct.

Ans 12:

VAIBHAV RAI from Cambridge Court High School, JAIPUR
Class : Class 6
I think all options are wrong

Ans 13:

Vrishank Sai Anand from GEMS Modern Academy, Dubai
Class : Class 2
SOF IS MAD

Ans 14:

Pratibha from Vaels billabong international, Chennai
Class : Class 5
Can somebody pls answer this question with explanation

Ans 15:

Yaduveer Rathore from MSMS School, Jaipur
Class : Class 5
wrong wrong wrong wrong wrong wrong

Ans 16:

ArhamAnay Jain 4G from MDPS, Faridabad
Class : Class 4
all options are wrong

Ans 17:

Vidhya M. from Vibgyor High Bannerghatta, Bangalore
Class : Class 4
When a substance is cooled the molecules come closer. But there is no picture showing that the molecules are coming closer there is no correct answer. Also option B and C are the same. Can you please change it?

Ans 18:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 6
Please please please please please please please please change the question

Ans 19:

Prerona Chatterjee from Delhi Public School North Kolkata, Kolkata
Class : Class 5
The question is wrong... and so the answer is also misleading.

Ans 20:

Aparna praveen from Rajagiri, Ernakulam
Class : Class 4
is there a correction in the options given?if not please clarify with explanation

Ans 21:

Shailaja Divakar from Chennai public school global school, London
Class : Class 6

Ans 22:

Anirudh Bhattacharjee from THE LEXICON INTERNATIONAL SCHOOL KALYANI NAGAR PUNR, Pune
Class : Class 5

Ans 23:

Isra Fathima from sophia high school, Bengaluru
Class : Class 6
The options given are wrong / confusing. Please clarify.

Ans 24:

Abhinav Kulkarni from National Centre For Excellence, Bengaluru
Class : Class 4
all Q are wrong

Ans 25:

Riddhima Pandey from Chinmaya Vidyalaya, Bokaro Steel City
Class : Class 3
I agree with Harry , 1 B AND C ARE NOT THE SAME. 2 When liquid is cooled down it forms solid, SO THE ONLY ANSWER IS CCCC

Ans 26:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 6
I also think that.Questions ,options, colums and answers didn't mentioned.

Ans 27:

Prashanth from Gems Modern Academy, Dubai
Class : Class 5
THE ANSWER IS WRONG.

Ans 28:

Samika Ranjan from The Shri Ram School Aravali, Gurgaon
Class : Class 7
please change the question.

Ans 29:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
ALL OPTIONS ARE WRONG

Ans 30:

Bhavya Jain from K R Mangalam World Scholl, GHAZIABAD
Class : Class 4
how can liquid turn into gas by freezing ? Option A does the same thing so the correct option should be D

Ans 31:

from ,
Class : Class 5
Options are wrong. Molecular distance should be less. first fix which column is X and Y.

Ans 32:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
Option b, c are the same. Pls give me a proper explanation as to why one option is correct

Ans 33:

Angshu from Dehli Public School Bangalore East, Bangalore
Class : Class 5
it is wrong

Ans 34:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
I have by mistake typed it Co sorry it will be C. I have a solution we can report error.

Ans 35:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 5
b and c are all the same

Ans 36:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 6

Ans 37:

Mahati p from cornerstone the public school, deepthi sreenagar colony hyderabad
Class : Class 6

Ans 38:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
The correct answer is C

Ans 39:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
The question , answer and the solution are all correct … Vrishank don't say that the SOF is mad ( I think you are mad ) you are a FOOL

Ans 40:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 7
I think al options are wrong . Please tell the correct answer

Ans 41:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
all are wrong

Ans 42:

Aarush Thakur from DPS, Gurgaon
Class : Class 6
option d maybe

Ans 43:

BISWADITYA TRIPATHY from Delhi public school Bangalore east, Bangalore
Class : Class 4
Please explain the answer. I also support Baibhab that the choices given are wrong.

Ans 44:

Tulaa Auti from Vidya valley school, pune
Class : Class 4
All are wrong. At least number of atoms should be same. So answer should be D

Ans 45:

Chiranjib kar from MOUNT LITERA ZEE SCHOOL, JAJPUR
Class : Class 6
Options are wrong. Molecular distance should be less.

Ans 46:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
Qtn. agreed but main point is which is column X and which is column is Y??????

Ans 47:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
B and Co are same. Intermolecular space is not decreasing in any of the situations. It is wrong.

Ans 48:

Saumya Asmriti from CITY MONTESSORY SCHOOL INTER COLLEGE LUCKNOW UTTAR PRADESH, Lucknow
Class : Class 4
All options are wrong.

Ans 49:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 5
all options are wrong

Ans 50:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 5
the options are wrong

Ans 51:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
ansAll answers oposite

Ans 52:

sundus from salwan public school, Gurgaon
Class : Class 4
All options are WRONG

Ans 53:

Deepayan Das from South Point High School, Kolkata
Class : Class 6
There is no specific details about which one is X or Y.So by common sense I think that it would be D.But B

Ans 54:

shreyash rawat from podar international school, pune
Class : Class 6
4wrong question

Ans 55:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
HARRY CAN YOU PLEASE EXPLAIN ME

Ans 56:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
None of the options are correct according to my doubt.

Ans 57:

Shailaja Divakar from Chennai public school global school, London
Class : Class 6
All the answer is wrong. In the NSO book, it is right.

Ans 58:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4

Post Your Answer

Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Achin conducted an experiment to find out the amount of light that can pass through three different materials, a clear plastic sheet, a cardboard and a piece of tracing paper. All the materials have the same thickness. He shone a torch on the three materials and used a light sensor to measure how much light has passed through each of them. Which of the following graphs most likely shows the amount of light that has passed through each material?

A
B
C
D


Ans 1:

Rajveer Santosh Mulik from Rims International School, Pune
Class : Class 4
YES , C IS CORRECT @RAJVEER

Ans 2:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 7
I think the ‘A’ is the right answer

Ans 3:

Saani from Cambridge School, Mangalore
Class : Class 1
A is correct

Ans 4:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5

Ans 5:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
AAAAAAAAA IS RIGHT

Ans 6:

Soorya Tej R from Delhi Public School, Hyderabad
Class : Class 5
a

Ans 7:

Alisha from Delhi Public School kolar road, Bhopal
Class : Class 4
C is right and correct ,and if isnt tell me hhhhhhhhhhhhhhhooooooooooooooooooooowwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwHOW?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????/

Ans 8:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC is correct

Ans 9:

Diyaa Wahi from GDGps Vasant Kunj, Delhi
Class : Class 4
C IS THE CORRECT ANS AS BOTH CLEAR PLASTIC SHEET AND TRACING PAPER ARE BOTH TRANSLUCENT AND HENCE ALLOWING EQUAL AMOUNT OF LIGHT TO PASS THROUGH.

Ans 10:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
The answer is C .

Ans 11:

Shreeraj from ISWK, Muscat, Muscat
Class : Class 4
Very Very Good

Ans 12:

Baibhab Tripathy from SAI INTERNATIONAL SCHOOL, BHUBANESWAR
Class : Class 7

Ans 13:

Aarnav Grover from Calorx olive international school, Ahmedabad
Class : Class 5
c

Post Your Answer

ANANYA.SINGH from dps, noida
Subject :NSO    Class : Class 2

Post Your Answer

saesha from sulochanadevi singhania school, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

naman from PSBBM, Chennai
Class : Class 1
answer will be d 4 kilo meters

Ans 2:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
4 km

Ans 3:

Reeth Bhasin from Jamnabai Narsee International School, Mumbai
Class : Class 5

Ans 4:

SRIJITA MURMU from DPS Joka, Kolkata
Class : Class 7
4km

Post Your Answer

Ved Parixit Brahmbhatt from Hillwoods School, Gandhinagar
Subject :NSO    Class : Class 9

Ans 1:

Aarthi from Prince matriculation higher secondary school , Chennai
Class : Class 9
SI unit of impluse is Newton

Ans 2:

Shrestha Dutta from Julien Day School, KALYANI
Class : Class 10
force=change in momentum/time interval(del t) impulse=change in momentum=force * time interval(del t) SI unit of impulse is newton second or Ns. CGS unit of impulse is dyne second .

Post Your Answer

Sanjana Thampy from Ncfe, Bangalore
Subject :NSO    Class : Class 9

Post Your Answer