National Science Olympiad Forum By SOF Olympiad Trainer - Page 509
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Abhay Agarwal from St Francis School, Ghaziabad
Subject :NSO    Class : Class 8

Ans 1:

vatsal jay gandhi from new era senior secondary school, Vadodara
Class : Class 8
please explain this question.

Ans 2:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
answer??????????????????????????????????????????????????????

Ans 3:

Bhramana Roy from Glendale Academy International, Hyderabad
Class : Class 8
Time taken to utter single syllable=1/5th of a sSpeed of sound in air=330m s^-1 or 330m/sso distance to reflecting surface=1/5 * 330 as that will give the distance=66.0mSo, distance to reflecting surface is 66.0m

Ans 4:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9
please explain this question

Ans 5:

Darsh Singh from DAV, Talcher
Class : Class 8
Yes, it should be 33m as distance for an echo = s x t/2

Ans 6:

Nilanjana De from Delhi Public School North, Bengaluru
Class : Class 8
Can someone please explain this question?

Ans 7:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9

Ans 8:

Prisha Hemchandra Lokhande from NPS Whitefield, Bangalore, Bangalore
Class : Class 8
Is the question wrong...? the answer should be 33.0 m as speed=2d/t

Ans 9:

Akhil Budithi from Kennedy high the global school , Hyderabad
Class : Class 8
please explain this question.

Ans 10:

Ansuman Mohanty from O.D.M.Plubic School, Bhubaneswar
Class : Class 9

Ans 11:

Kabir Kaushik from Elpro International School, Pune
Class : Class 8
Yes I think it is 33 also because it says it is an echo

Post Your Answer

SAYAN MONDAL from BURDWAN CMS HIGH SCHOOL, BURDWAN
Subject :NSO    Class : Class 4

Ans 1:

Akshat Pathak from DPS, Noida
Class : Class 4
correct answer is D

Ans 2:

Nakul Bhasker from National Public School Whitefield, Bangalore
Class : Class 5
THE ANSWER IS D AS FROG HAS 4 STAGES IN IT'S LIFE CYCLE ,BUT DOES NOT LOOK LIKE IT'S PARENT.WHILE,MOSQUITO HAS THREE SYTAGES IN IT'S LIFE CYCLE AND DOES NOT LOOK LIKE IT'S PARENT.I MADE THE SAME MISTAKE IN THE PREVIOUS TEST

Ans 3:

Kishore Kadiyala from NPS, BANGALORE
Class : Class 5

Ans 4:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 5:

Manan thorat from Podar powai, Mumbai
Class : Class 4
Frog has 4 stages any of the answers are not correct

Ans 6:

Nishchita from Gems Modern Academy , Dubai
Class : Class 8
The correct answer is C

Ans 7:

LAVANYA DADHWAL from BLOOM PUBLIC SCHOOL, South West Delhi
Class : Class 9

Ans 8:

Krishna Kumari Nayak from Sai International school , Bhubaneswar
Class : Class 4
It is option B

Ans 9:

Rishita Sivakumar from Indian High School, Karama Dubai
Class : Class 9
the answer is d

Ans 10:

Rishita Sivakumar from Indian High School, Karama Dubai
Class : Class 9

Ans 11:

Kishore Kadiyala from NPS, BANGALORE
Class : Class 5
the answer is d as the mosquito does not look like the parent , has 3 stages of life and lays eggs while frog does not look like the adult , has 4 stages of life and lays eggs .

Ans 12:

Krish Karthik from freedom international school, Bangalore
Class : Class 5
but frog dosnt have just 3 life stages it has 4 so its not the answer

Ans 13:

Shreshta from Presidium, Ghaziabad
Class : Class 3
The answer which is given in the SOF application is wrong, because a frog has four life stages in his life stages, the correct answer must be moth because it has only three life stages in his life cycle and the parent and child do not look same,

Ans 14:

Harsh Sobti from the samhita academy, BLR
Class : Class 5

Post Your Answer

Chiranjib kar from MOUNT LITERA ZEE SCHOOL, JAJPUR
Subject :NSO    Class : Class 5

Ans 1:

Ajitesh Mishra from Vikas the concept school, Hyderabad
Class : Class 5
ANS A

Ans 2:

Swastik Srivastava from Baldwin Boys High School, Bangalore
Class : Class 5
ans is B

Ans 3:

S A ANIRUDH from S B O A SCHOOL AND JUNIOR COLLEGE, CHENNAI
Class : Class 5
Answer is C

Ans 4:

Bhavya from ABC, Delhi
Class : Class 7
super easy answer. it is 'A'

Post Your Answer

Chiranjib kar from MOUNT LITERA ZEE SCHOOL, JAJPUR
Subject :NSO    Class : Class 5

Ans 1:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
What is the question?????????????????????????????????

Ans 2:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 3:

Reynah Gupta from The Shri Ram School, Aravali, Gurugram
Class : Class 10
question is incomplete

Ans 4:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 7
There is no question. What are we supposed to answer. It is incomplete

Ans 5:

Etash M B from Sri Sri Ravi Shankar Vidya Mandir, Bengaluru
Class : Class 5
where the h

Ans 6:

Siddhanth Subramanian from Global Indian International School , Singapore
Class : Class 7
question????????????????

Ans 7:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
The question is in the solution please check

Ans 8:

Ashwak from Cambridge, Jalandhar
Class : Class 9
question is incomplete

Ans 9:

sarah pranav gothivarekar from Indian School Al Gubra, Muscat
Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 10:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
No relevant question

Ans 11:

Jasmine Kaur from Venkateshwar International School , New Delhi
Class : Class 5
There is no question!

Ans 12:

Swastik Srivastava from Baldwin Boys High School, Bangalore
Class : Class 5
where is the question ??????????????????

Ans 13:

marika from VTS, Mumbai
Class : Class 4
There is no question and when I reported that error, it just came as "invalid"

Ans 14:

Malav patel from Navrachana school sama , Vadodara
Class : Class 5

Ans 15:

Pratham Dave from GNS, Bangalore
Class : Class 7
No question?????????????????????????????

Ans 16:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6

Ans 17:

Ayushree Barman from Sri Sri Academy, Kolkata
Class : Class 6
Where is the question? Isn't it very vague?

Ans 18:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
no question.report error please

Ans 19:

Kavin Karthick M from DPS bangalore east, Bengaluru
Class : Class 6
there is no proper question?

Ans 20:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
see the solution the question is how many kharif crops are there. there are 6.

Ans 21:

Aditi DasBidhar from Treamis World School, Bengaluru
Class : Class 6
Where is the question!?

Ans 22:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

Ans 23:

Shreetej from Pearson public school, Pune
Class : Class 5
where is the question???????????????????????????

Ans 24:

Shaanvi from ,
Class : Class 5
wrong question, incompleted question!!!!!!!!!!!!!????

Ans 25:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 26:

Chandradeep Kumar from ,
Class : Class 5

Ans 27:

kushaal srinandan reddy bandi from bhartiya vidya bhavans public school vidhyasharam jublee hills , HYDERABAD
Class : Class 6
this is not a question

Ans 28:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
no question!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 29:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 7

Ans 30:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
report error

Ans 31:

Suvanjot Kaur from Springdale Senior School, Amritsar
Class : Class 5
The question is incomplete

Ans 32:

SUARGHYA CHATTERJEE from INDIA INTERNATIONAL SCHOOL, asansol
Class : Class 5
WHERE IS THE QUESTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!??????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!???????????????????????????

Ans 33:

Mishika shah from little angels high school, gwalior
Class : Class 9
The question is there in the solution please check

Ans 34:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
If they don't give the complete question, we all will get it wrongSOF please look into this matter

Ans 35:

Samyuktha from Sri Chaitanya, Chennai
Class : Class 7
they did not give the question .

Ans 36:

Shreyan from Delhi Public School Bangalore East, Bangalore
Class : Class 5
what.

Ans 37:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Post Your Answer

Shreenath Rajesh Nair from J H A S V Surat, Surat
Subject :NSO    Class : Class 8

Ans 1:

neelu desai from bombay scottish, mumbai
Class : Class 8

Ans 2:

ANUSHKA SHARMA from CAMBRIDGE COURT WORLD SCHOOL, JAIPUR
Class : Class 8
Please explain how the deviation has happened at 180 degrees

Ans 3:

NAMAN HARITASH from DPS DLF CITY, GURGAON
Class : Class 9
but due to water refraction will also take place

Ans 4:

Shaman Amin from SDM school, Mangalore
Class : Class 10
But wont the refraction of light in water play a role?

Ans 5:

vrrsekar from INDIAN SCHOOL SUR OMAN, sur
Class : Class 6
Thank You Mr.Rahul

Ans 6:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8
explain please....

Ans 7:

Rahul Jha from Delhi Public School BN, Bengaluru
Class : Class 8
Key Idea: Phenomenon of reflection is independent of medium. The deviation produced by combination of two plane mirrors is δ=2π−2θ =2π−2×π2 (θ=90o) ⇒ δ=π=180o. Hence, total deviation in incident ray is180o

Ans 8:

Khushi Chaudhuri from Step By step, Noida
Class : Class 8
Why does the deviation happen to be 180 degrees

Post Your Answer

H R Kanish from Chennai public school, Chennai
Subject :NSO    Class : Class 6

Ans 1:

Alyassa Pradhan from St Josephs Convent Higher Secondary School, Sambalpur
Class : Class 4
D

Ans 2:

Kushal from Chirec, Hyderabad
Class : Class 7

Ans 3:

Advait talnikar from Dhruv Global School, Sangamner
Class : Class 6
Answer can be A

Ans 4:

Ayush malik from JAI KRAISHANA INTERNATIONAL SCHOOL, Rohtak
Class : Class 6
D

Post Your Answer

H R Kanish from Chennai public school, Chennai
Subject :NSO    Class : Class 6

Ans 1:

MAHI ABHIJIT CHAUDHARI from Sentia The Global School, HYDERABAD
Class : Class 6
Answer B is the correct answer as the question specified for the arrangement which will allow the bulb to stay lighted for the longest possible time. Option B is connected as One cell as per the circuit (all connections are in parallel), While Option D is in Series (in case of failure of one cell, the circuit will not work as the current will not pass through the cell)

Ans 2:

Shabd Mehta from Shabd Mehta, Agra
Class : Class 7
How many times will olympiad confuse us its D

Ans 3:

BHAVYA JHA from GLOBAL CITY INTERNATIONAL SCHOOL, BANGALORE
Class : Class 6
According to me D is the correct answer

Ans 4:

Harsh Kedawat from Apeejay, Noida
Class : Class 8
pls explain how the answer is B

Ans 5:

Pranjal Chaudhari from St Aloysius Convent High School, Bhusawal
Class : Class 6
pls explain how the answer is B

Ans 6:

SOURADEEP SHARMILA MANDAL from KENDRIYA VIDYALAYA IISC, Bengaluru
Class : Class 7

Ans 7:

Pranav Kartik from DPS sushant lok , Gurgaon
Class : Class 3
D is the correct answer

Ans 8:

Ashi Goyal from Sacred heart convent school,raikot road,barnala, punjab
Class : Class 6

Ans 9:

Hemanshu VM from Sri Kumaran Public School, Bangalore
Class : Class 6
the answer is D

Ans 10:

Naitik Mundra from International School Rheintal, Buchs Sankt Gallen
Class : Class 9
When a battery is constructed such that all the positive terminal of the cells are connected to a same point and all the negative terminals of the cells are connected to another point then the grouping of cells in this manner is called the Parallel Grouping of cells. The two end terminals of the construct where all the positive and negative terminals of the cells are connected act as the corresponding terminal of the battery.

Ans 11:

PS Gour from Chirec international schoo The best 30 years and beyond, Hyderabad
Class : Class 7
according to me D is correct

Ans 12:

Kushal from Chirec, Hyderabad
Class : Class 7

Ans 13:

Kaustav Bhowal from Julien Day School, Kolkata
Class : Class 10
D is the correct answer.

Ans 14:

Shantaneel Sarkar from Delhi Public School, Nagpur
Class : Class 6
According to me D is the correct answer as a wire should be connected from a terminal of a battery to the - terminal of the battery for longer stay of electric circuit, and this rule is satisfied by the circuit shown in option D.

Ans 15:

Shourya Kumar from Delhi Public School Noida, Noida
Class : Class 9

Ans 16:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8

Ans 17:

SUSHEELA KAMLENDRA from FLORENCE ACADEMY, BENGALURU
Class : Class 6

Ans 18:

Kshitij from Sams, Bangalore
Class : Class 6
pls explain how the answer is bBTW: your answer is correct

Ans 19:

Smita De from Bishop Cotton Girls School, BANGALORE
Class : Class 5

Ans 20:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

Ans 21:

Ayush malik from JAI KRAISHANA INTERNATIONAL SCHOOL, Rohtak
Class : Class 6
D

Ans 22:

Aayush Reddy Bomidika from Delhi Public School Nacharam, Hyderabad
Class : Class 9
D is definitely the correct answer

Ans 23:

Naitik Mundra from International School Rheintal, Buchs Sankt Gallen
Class : Class 9
Answer is B

Ans 24:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

Ans 25:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10

Post Your Answer

Pranjal Chaudhari from St Aloysius Convent High School, Bhusawal
Subject :NSO    Class : Class 6

Ans 1:

AUSTIN from Viswajyothi CMI Public School, Chowara
Class : Class 7
the answer is C because YARNS are woven not FIBRES

Ans 2:

Kaushik Bhattacharya from LVIS, NOIDA
Class : Class 7
There seems to be an error in this. We feel that it is B

Ans 3:

Rithvik Chandra from Greenwood High School, Bangalore
Class : Class 6
it is C, YARNS are woven not FIBRES.

Ans 4:

Pratheek from Null, Null
Class : Class 4
It is C!!!!! Be careful!!!!!!!!!

Ans 5:

shrawan azad from DPS VASANTKUNJ NEW DELHI, New Delhi
Class : Class 4
The answer is B

Ans 6:

PRISHA WAGH from G D SOMANI MEMORIAL SCHOOL, MUMBAI
Class : Class 7
answer is B

Ans 7:

Nandini from Ins, Pune
Class : Class 8

Ans 8:

Admin fly from Ddssxxx, Ax
Class : Class 1
there is an error. the answer is C

Ans 9:

Ishita Pandey from The Samhita academy, Bengaluru
Class : Class 7
I agree with A Ramakrishna's point

Ans 10:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8
it is cccccccccccccccccccccc!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 11:

anika from St Joseph sen sec school Mahoba, Kulpahar
Class : Class 5
its an error as weaving is done as sam eas decribed in statement 2 i think answer should be ...............BBBBB......................

Ans 12:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
Answer is C. As you can't weave fibres.read the question properly!!!!!!!!!!!!!!!

Ans 13:

nimay gupta from Shiv Nadar School, noida
Class : Class 8

Ans 14:

Animesh Jain from DPS, Bengaluru
Class : Class 10

Ans 15:

Pragnay Priyadarshi from Quantum Leap School, HYDERABAD
Class : Class 7

Ans 16:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
thanks for the answer

Ans 17:

Sarah Ishika Dowerah from Delhi Public School, Numaligarh
Class : Class 8
I think the is option B

Ans 18:

Pranav Kartik from DPS sushant lok , Gurgaon
Class : Class 3
It is C only!!!

Ans 19:

Ahana Mandal from Delhi Public School Asansol , Asansol
Class : Class 6
Very good and tricky question

Ans 20:

A Ramakrishna Rao from D A V Public School. Unit 8. Bhubaneswar , Bhubaneswar
Class : Class 6
the correct answer is c as it is given weaving fibres not weaving yarn.read the question carefully.

Ans 21:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Answer is C. ttraj's point is true.

Ans 22:

Sarah Ishika Dowerah from Delhi Public School, Numaligarh
Class : Class 8

Ans 23:

AARNA Kapse from The swaminarayan school, Nagpur
Class : Class 7
Ans = C

Ans 24:

Aarushi Upadhyayula from The Cambridge International School, Bengaluru
Class : Class 7
The answer would be C. If you read the question carefully, it says, "Weaving is done by interlacing two sets of FIBRES at right angles." There are two things wrong with this: 1) They need not be interlaced at right angles. 2) The question clearly says 'fibres', not 'yarns' as it should be. Therefore, the answer is C.

Ans 25:

Aditya Korke from Ekya, Bengaluru
Class : Class 6
Both statements are true

Ans 26:

Parth Kadam from Pawar Public School , Nanded City, Pune
Class : Class 8
The answer is B

Post Your Answer

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

Post Your Answer

Chaitanya L K from SKCHEC, bangalore
Subject :NSO    Class : Class 7

Ans 1:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7

Ans 2:

Nivriti from Euro, Mumbai
Class : Class 8
ns is C

Ans 3:

Ashvita R from PSBB Millennium School OMR, Chennai
Class : Class 7
i clicked the correct option but it showed wrong.. this system is completely stupid.. 0 stars out of 5

Ans 4:

P Easha from Chettinad Vidyashram, Chennai
Class : Class 7
p

Ans 5:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
q

Ans 6:

Nivriti from Euro, Mumbai
Class : Class 8
ans is c

Ans 7:

Hritvi from Podar International School, Mumbai
Class : Class 7
Bubble pack is a good insulator than a cotton wool.

Post Your Answer