National Science Olympiad Forum By SOF Olympiad Trainer - Page 487
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Aaryav Tiwari from DPS VK, Delhi
Subject :NSO    Class : Class 6

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Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Subject :NSO    Class : Class 6

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nishant doshi from new era senior secondary school nizampura vadodara, Vadodara
Subject :NSO    Class : Class 6

Ans 1:

Shabd Mehta from Shabd Mehta, Agra
Class : Class 6
VOTE FOR OPTION D (SAY D)

Ans 2:

Samitha Kumar from Boaz Public School , Chennai
Class : Class 10

Ans 3:

Anish Kumar from Dehli Public School, Bopal, Ahmedabad
Class : Class 7
Read the question carefully kids!

Ans 4:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The answer is C as if assume x as a insulator , all other condition satisfy

Ans 5:

Ahana Mandal from Delhi Public School Asansol , Asansol
Class : Class 6
Very good question. Here object X is a insulator but the bulbs glow up because of parallel connection of circuit. So according to that, option A is wrong and is the correct answer.

Ans 6:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7
ANSWER IS B

Ans 7:

Mangesh Mukund Shete from Phoenix, Hyderabad
Class : Class 3
pls explain

Ans 8:

Falguni from Navkis, Bangalore
Class : Class 7
Can someone explain it ,please??

Ans 9:

SURYAKANTA MAHALIK from SAI International Scool, Bhubaneswar
Class : Class 6
It says wrong then its A

Ans 10:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Answer supposed to be b

Ans 11:

Avya Pandey from NPS International, Singapore
Class : Class 8
It says which one is wrong, not right

Ans 12:

aikya from psbn, bangalore
Class : Class 5
someone please explainnnnn

Ans 13:

PS Gour from Chirec international schoo The best 30 years and beyond, Hyderabad
Class : Class 7
plz answer

Ans 14:

ADITHYA B SOMARAJ from chinmaya vidyalaya thripunithura, cochin
Class : Class 3
And is A since X is insulator it doesn't allow electricityTo pass through so nothing glows

Ans 15:

SURYAKANTA MAHALIK from SAI International Scool, Bhubaneswar
Class : Class 6
if x is insulator it should be D

Ans 16:

Samitha Kumar from Boaz Public School , Chennai
Class : Class 10

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UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Subject :NSO    Class : Class 7

Ans 1:

Hritvi from Podar International School, Mumbai
Class : Class 7
Option D is the right answer. The Solution also tells the same then how can they say our answer is wrong?? Try putting this question in the "ERROR" box

Ans 2:

bhuvan from vvs, bengaluru
Class : Class 7
Option D is the right answer

Ans 3:

Hritvi from Podar International School, Mumbai
Class : Class 7
Q also can be cockroach. Thus in my OPINION C can also be the answer

Ans 4:

Ahaan Pathak from Treamis World School, Bangalore
Class : Class 8
Its Option D

Ans 5:

SUNIL KHANDELWAL from Bhartiya Bhavans, Kolkata
Class : Class 7
but the question says to choose incorrect answer

Ans 6:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 9
The answer has to be D because they have asked for the incorrect option

Ans 7:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4
answer should be A. They have asked for the INCORRECT OPTION and A is incorrect. Earthworm uses skin not trachea. The answer is A. It also appears in my solution

Ans 8:

sunil agrawal from DPS chandigarh, Mohali
Class : Class 7
Wrong answer provided . Even the solution says answer d

Ans 9:

Ekansh Agrawal from NDPS, Indore
Class : Class 7

Ans 10:

Sainyam Sharma from Thakur Public School, Mumbai
Class : Class 7
Answer is C

Ans 11:

Krishna Srivastava from manipal public school, lucknow
Class : Class 7
Option D

Ans 12:

swayam aditya from LR DAV public school, Cuttack
Class : Class 8
eplanation given is correct but answer is option d

Ans 13:

Hritvi from Podar International School, Mumbai
Class : Class 7
Forget about the Option C. Option D is the right answer.

Ans 14:

Naitik Mundra from International School Rheintal, Buchs Sankt Gallen
Class : Class 9
Answer should be D. Solution provided by them says so too.

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aditya arora from Heritage Experiential Learning School, gurugram
Subject :NSO    Class : Class 6

Ans 1:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct answer is option B . A compass may be used to find East and west direction . Once you find North and South , by facing north , the right side will be East and left one will be West

Ans 2:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 7
The answer could be B and D as both are correct

Ans 3:

Charunainika A L from SILVER HILLS HSS, Kozhikkode
Class : Class 6
Also, d is right. Attraction is a sure test for magnetism. both b and d are right. Compromised?

Ans 4:

Abhiram Vedula from Deens Academy, Gunjur, Bangalore
Class : Class 6
both b and d are correct.

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 2:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
How is 1 correct? Please reply

Ans 3:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
as per Wikipedia no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 4:

Pratham Dave from GNS, Bangalore
Class : Class 7
2 and 4 is the answer to this question

Ans 5:

Siddhant Singhania from AGCS purulia, Puruliya
Class : Class 7

Ans 6:

Bertrand Calvin Fernando from Aqunias International School, mumbai
Class : Class 5

Ans 7:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
Please correct it

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Harsh Gupta from saint anslems pink city jaipur , Jaipur
Class : Class 5
Both A and C are correct

Ans 2:

PARUL GHARSE from Vibgyor, Mumbai
Class : Class 6
cerebrum is the largest part of the brain. cerebellum is the second largest part and it controls musculo-skeleton movement

Ans 3:

Ayushman from Adamas International School, Kolkata
Class : Class 6
Correct answer should be d because cerebellum is below cerebrum, located towards the back of the brain.

Ans 4:

Prashant MD from Ambassador School Dubai, Dubai
Class : Class 5

Ans 5:

Navya GUPTA from dps noida, Noida
Class : Class 3
This is absolutely correct as y is cerebrum and x is. EllThis Is absolutely correct as y is cerebrum X is cellebellum and Z is the Medulla ✅✅✅✅

Ans 6:

Pratham Dave from GNS, Bangalore
Class : Class 7
B is the answer to this question but it is showing A as correct option and it is showing B as correct option in the solutions.

Ans 7:

Sonika from Delhi public school, Faridabad
Class : Class 7
THERE CHECKING IS WRONG AS ANSWER IS C

Ans 8:

vayurve gowda from narayana group of schools, chennai
Class : Class 6
this question is wrong

Ans 9:

inaira heredia from Jamnabai narsee international school, MUMBAI
Class : Class 5
It says which option is incorrect not which one is correct

Ans 10:

Fateh Singh Nanda from Gems modern academy, Dubai
Class : Class 5

Ans 11:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
This question is correct

Ans 12:

rajanya mandal from j h ambani, surat
Class : Class 4

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Devansh from asn senior secondary school, delhi
Subject :NSO    Class : Class 3

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 6
A

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
A

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PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Subject :NSO    Class : Class 6

Ans 1:

Ayan Gupta from sdf public school, GAUTAM BUDDHA NAGAR
Class : Class 6
The correct is NSN

Ans 2:

Shivani from DPS North school , Bangalore
Class : Class 7
There is no option only for the answer they had provided us with, gave the correct explanation but the need to correct the answer as well.

Ans 3:

ADRIJA SAHA from DPS RANIPUR, Haridwar
Class : Class 6
The answer does not match with the solution. There should be a change in the answer.

Ans 4:

shrenik from anand niketan, Ahmedabad
Class : Class 9
yes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
YES , their answer is not matching with their solution !!

Ans 6:

Shriya Prakash from NPS International, Singapore
Class : Class 6

Ans 7:

Arsh from Lahs, Gwalior
Class : Class 3
ayush u are right!!!!!!!!!!!!!!!

Ans 8:

Arjun gupta from Dps noida , Noida
Class : Class 7
why arent they changing the answer

Ans 9:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4

Ans 10:

arpan bar from Future Bhubaneswar School, BHUBANESWAR
Class : Class 7

Ans 11:

shrenik from anand niketan, Ahmedabad
Class : Class 9

Ans 12:

Kaustav Bhowal from Julien Day School, Kolkata
Class : Class 10
clear objection

Ans 13:

Shriya Prakash from NPS International, Singapore
Class : Class 6
Although the explanation is correct, it does not match the answer

Ans 14:

Rachna Jo from HIS, BLR
Class : Class 6
correct option is C, not B. Please make correction.

Ans 15:

Surya from INDIAN SCHOOL JALAN OMAN, Alkamil oman
Class : Class 7
they aren't giving the answer and the solution same in some papers

Ans 16:

Vikram from AVM, Mumbai
Class : Class 5

Ans 17:

Shubhangi Pathak from Lilavatibai Podar High School, Mumbai
Class : Class 8
Pls rectify.

Ans 18:

Pratheek from Null, Null
Class : Class 4
What is this? Answer and solution are completely different, they are not matching!

Ans 19:

Aarav Gupta from Cambridge International School, Jalandhar
Class : Class 5
The option selected here is wrong.

Ans 20:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
please explain. your solution doesn't match the correct answer provided by you.

Ans 21:

arpan bar from Future Bhubaneswar School, BHUBANESWAR
Class : Class 7
Given correct answer and explanation do not match...please rectify...

Ans 22:

SHIRIN BHATTACHARYYA from St. Joseph's Convent School, KHANDWA
Class : Class 10

Ans 23:

lavanya from sacred heart convent school, raikot road Barnala , Barnala
Class : Class 3

Ans 24:

Satwik Dixit from Christ Academy, Bangalore
Class : Class 7
Answer and solution are completely different, they are not matching!The solution is correct, but their ans is wrong

Ans 25:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
NA

Ans 26:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8
The ans is not matching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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EKLAVYA GONDULE from DPS BHILAI, Bhilai
Subject :NSO    Class : Class 6

Ans 1:

Aritra Porey from DPS Bangalore North, Bengaluru
Class : Class 10
According to definition - answer would be 0.2 s

Ans 2:

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

Ans 3:

kiyoshi from st xavier high school, Jaipur
Class : Class 6
The answer should be 0.2 s

Ans 4:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 9
the answer is wrong

Ans 5:

Lakshya Gupta from Manthan, Hyderabad
Class : Class 6

Ans 6:

shashwat from vidyashram, jaipur
Class : Class 8
please explain the answer

Ans 7:

Satwik Dixit from Christ Academy, Bangalore
Class : Class 7
The swing completes 25 oscillations in 5 seconds So, It will complete 1 oscillation in 5/25 seconds = 0.2 secondsSo, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 8:

Angela M Dodmani from The jain International school, HUbli
Class : Class 7
The answer is wrong. It is 0.2

Ans 9:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
answer is wrong it should be 0.2 s

Ans 10:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
According to definition - answer would be 0.2 s

Ans 11:

Kaustav Bhowal from Julien Day School, Kolkata
Class : Class 10
the answer is wrong , it should be 0.2s. please kindly provide the solution to this question.

Ans 12:

SOURADEEP SHARMILA MANDAL from KENDRIYA VIDYALAYA IISC, Bengaluru
Class : Class 7
I THINK IT COMPLETES 25 OSCILLATIONS IN 5s

Ans 13:

shrawan azad from DPS VASANTKUNJ NEW DELHI, New Delhi
Class : Class 4
Answer is wrong

Ans 14:

Anoop Haridas from dpsmis doha, doha
Class : Class 8
I think this answer is wrong. It should be 0.2 seconds, according to the definition of a Time Period in oscillatory motion.

Ans 15:

Prajith Kumaran from RCIS, Bangalore
Class : Class 7

Ans 16:

PRISHA WAGH from G D SOMANI MEMORIAL SCHOOL, MUMBAI
Class : Class 7
wrong answer. should be 0.2s

Ans 17:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6
The answer has to be 0.2 seconds(5/25). Pls correct

Ans 18:

Kaushik Bhattacharya from LVIS, NOIDA
Class : Class 7
The answer seems to be wrong. 5 seconds to complete 25 oscillations. That means for one oscillation it is 5/25 = 0.2 seconds. 'Period' usually means one complete oscillation that is 0.2 seconds and that is not given.

Ans 19:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
The time taken to complete one oscillation - a left swing and a right swing - is called the time period (T); it is measured in seconds.A swing takes 5 seconds to complete 25 oscillations. That means it would take 1 second to complete 25 ÷ 5 = 5 oscillations. That also means it would take 1 ÷ 5 = 0.2 seconds to complete 1 oscillation.So, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

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