National Science Olympiad Forum By SOF Olympiad Trainer - Page 497
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DIKSHIT SUNDAR from vidhysaram, chennai
Subject :NSO    Class : Class 5

Ans 1:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 3:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10

Ans 4:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
no chart no answer

Ans 5:

FAIZAN HUSSAIN from SYED ABID HUSSAIN SR. SEC. CHOOL (MIDDLE SECTION), DELHI
Class : Class 4
Low High Many Many

Ans 6:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3
D

Ans 7:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
Sorry all, I had not read the question well.😞😞

Ans 8:

Ujjwal Upadhyay from Navy Children school, Vasco
Class : Class 6
The answer is d

Ans 9:

Suhani from DPSG, Modinagar
Class : Class 9
The answer is c

Ans 10:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
d

Ans 11:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Sorry , my brother changed the C into D . It should be C only !

Ans 12:

Hitarth Bhardwaj from Teoler High School, Jaipur
Class : Class 6
Veer Sehrawat, how c, the question says which town is located near an unpolluted river not a polluted river.

Ans 13:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 14:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
ans is D so easy

Ans 15:

Sumit Biswal from Dps gandhinagar, Gandhinagar
Class : Class 7
I was a bit confused between C and D

Ans 16:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 17:

ishaan from lvis, noida
Class : Class 5
c

Ans 18:

Rishit Garg from Bhavan s B P Vidya Mandir , Nagpur
Class : Class 9

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 9

Ans 2:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
NA

Ans 3:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

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Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

Tejesh VB from GEMS New Millennium School, Al Khail, Dubai
Class : Class 8

Ans 2:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM
Class : Class 7
Mocking or copying.

Ans 3:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
😓😓copying

Ans 4:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
What is mimicry?

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aadin josefina from sorsfort international school,
Subject :NSO    Class : Class 4

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Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10

Ans 2:

Aarushi Upadhyayula from The Cambridge International School, Bengaluru
Class : Class 7
The answer D is correct. Magnetic field moves from North to South, and if you follow the direction of the compasses, you will see that this theory is true.

Ans 3:

Stuti Chakroborty from Jain Heritage School, Bangalore
Class : Class 6

Ans 4:

Aryan Agarwal from Mayoor School, Noida
Class : Class 8

Ans 5:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Ans 6:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct and is D as the magnetic field moves from North to south

Ans 7:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

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MARIA K PAUL from DON BOSCO SCHOOL OF EXCELLENCE EGMORE, CHENNAI
Subject :NSO    Class : Class 6

Ans 1:

aritroray from Chirec International School, Hyderabad
Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.

Ans 2:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7
no because what will u do of zero u have to

Ans 3:

chittaranjan kar from MLZS, Jaipur
Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.

Ans 4:

AUSTIN from Viswajyothi CMI Public School, Chowara
Class : Class 7
i think its C

Ans 5:

sujata patel from Podar International, Pune
Class : Class 6
it is simple that while measuring, at first you eye must be vertically above 0

Ans 6:

atharv nila from VIBGYOR, Bengaluru
Class : Class 6

Ans 7:

Mansi Sadavarti from Vibgyor High, Pune
Class : Class 7
I agree with Aritroray the answer should be C

Ans 8:

sujata patel from Podar International, Pune
Class : Class 6
cccccccccccc

Ans 9:

Rahil from Delhi Public School Faridabad, Faridabad
Class : Class 7
No as it causes a parallax error. It should be option A. If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions. You will see that, the measurement varies slightly every time. That's why option A is correct.

Ans 10:

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

Ans 11:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
GIVEN ANSWER IS NOT CORRECT AS A IS THE CORRECT ANSWER

Ans 12:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10

Ans 13:

from , Jajpur
Class : Class 6
the answer will be both a and b

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Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Rahil from Delhi Public School Faridabad, Faridabad
Class : Class 7
A as image is as far behind the mirror as Object is in front of it. In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead. As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror. As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror. ( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror. Hope that answers your question !

Ans 2:

Admin fly from Ddssxxx, Ax
Class : Class 1

Ans 3:

Nandan Makineni from VIBGYOR HIGH, Bangalore
Class : Class 6

Ans 4:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9

Ans 5:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Ans 6:

Admin fly from Ddssxxx, Ax
Class : Class 1
A

Ans 7:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
A

Ans 8:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8

Ans 9:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
A

Ans 10:

Aarohi Srihari Torgal from V.V.S B.M Sri Educational Institutions , Mysure
Class : Class 6
A

Ans 11:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 7

Ans 12:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 13:

arnav from Dps noida, Delhi
Class : Class 8
a

Ans 14:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

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Deeptajit Roy from Gems Modern Academy, Dubai
Subject :NSO    Class : Class 5

Ans 1:

Dhruv Osekar from Mitra Academy, Bangalore
Class : Class 5

Ans 2:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
yes ,you are rightans is c

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10

Ans 4:

Achyut Prasad from Prabhujee English Medium School, Bhubaneswar
Class : Class 5
Ans is C potato is stem and sugar cane also stem

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

Ans 1:

Kashika Goel from DPS Noida, Noida
Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Ans 2:

Kashika Goel from DPS Noida, Noida
Class : Class 7
frictional force is answer prevents from slipping

Ans 3:

Vineet Banode from New Horizon Scholars School, Pune
Class : Class 5
Yes how it can be C ?

Ans 4:

Prayaan handel from Billabong high international school, Bhopal
Class : Class 4
how about B

Ans 5:

Kashika Goel from DPS Noida, Noida
Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Ans 6:

Ashwak from Cambridge, Jalandhar
Class : Class 9

Ans 7:

Raghav Agarwal from Dinobli School, jharia
Class : Class 4
How is it C

Ans 8:

Ivan Tyagi from Chirec International School , Hyderabad
Class : Class 8

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