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

User Forum

Ask Your Question
A Ramakrishna Rao from D A V Public School. Unit 8. Bhubaneswar , Bhubaneswar
Subject :NSO    Class : Class 5

Ans 1:

Rohan David from Oakridge International school, Hyderabad
Class : Class 5
The answer is D because the stapler is the odd one out

Ans 2:

Shruthi from VIBGYOR, Mumbai
Class : Class 6
What is type of Option A?

Ans 3:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
yes because the stapler is a third class lever

Ans 4:

D Murari from Indian School of Excellence, Bangalore
Class : Class 5

Ans 5:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5

Ans 6:

Kavin Karthick M from DPS bangalore east, Bengaluru
Class : Class 6
option D is correct because stapler is 3rd class lever

Ans 7:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 6

Ans 8:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 6
Stapler ( option D ) is the odd one out as it is a third class lever i.e. effort is between the load and fulcrum .

Post Your Answer

Sarthak yadav from RPS, Mahendragarh
Subject :NSO    Class : Class 4

Ans 1:

shibin joseph from ,
Class : Class 3

Post Your Answer

M.MEYYAPPAN from DPS, Bhilai
Subject :NSO    Class : Class 8

Ans 1:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 2:

kd from st Jude's academy , sonipay
Class : Class 8
A

Ans 3: (Master Answer)

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

Post Your Answer

jeeva from Kendriya Vidyalaya Kottayam, Kottayam
Subject :NSO    Class : Class 8

Ans 1:

aryanvir from lotus valley international school, haryana
Class : Class 8
ans : A

Ans 2:

Siddharth Mahesh from mdav public school , Hyderabad
Class : Class 8

Post Your Answer

archana from carmel, nahan
Subject :NSO    Class : Class 3

Ans 1:

Arrunabh from Delhi public school, Indore
Class : Class 3
i m not getting the answer

Ans 2:

Smita Roy from Nava Nalanda Santiniketan Shakha, Bolpur
Class : Class 3
D

Post Your Answer

HARSHAL KUTE from cambridge school buldhana, Buldhana
Subject :NSO    Class : Class 6

Ans 1:

Issac Newton from IIT Indian Institutes of Technology , Jalandhar
Class : Class 5
Yes it should be t/10 as the pendulum will pass through point y twice in its one revolution...... so the the time period should be t/10

Ans 2:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 3:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
It should be T/21 only as T is the total time and no of times it passes Y is 21.Therefore the answer is T/21

Ans 4:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Ans 5:

Joe from St.Vincent pallotti, Bangalore
Class : Class 6

Ans 6:

Anika Saha from New Town School, KOLKATA
Class : Class 6
throughout the time period or the 21 swings the pendulum will pass through the point Y 21 times. so the answer is B(t/21)

Ans 7:

Mayank Mili from Delhi Public School, Golaghat
Class : Class 7

Ans 8:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
yes I also agree with you

Ans 9:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
I agree with you

Ans 10:

Jaidev Chowdhary from Veeramachineni Peddayya Siddhartha Public School, VIJAYAWADA
Class : Class 6

Ans 11:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
it should be t/10 only as during time period the pendulum will pass through the point y twice.so the time period will be t/10

Post Your Answer

HARSHAL KUTE from cambridge school buldhana, Buldhana
Subject :NSO    Class : Class 6

Ans 1:

KEERTHANA SHIBU from INDIAN SCHOOL GHOUBRA, Oman
Class : Class 6
NA

Ans 2:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
gas to solid is deposition and opposite is sublimation ans wrong

Ans 3:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
How in processes v condensation came?

Ans 4:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
The answer can be B and D both.

Ans 5:

RICHA BORAH from K V ANNA NAGAR, CHENNAI
Class : Class 6
I also agree with all of you . That's just impossible, I guess.

Ans 6:

ADRIJA BANERJEE from KANAURIA GANGABAUX BHARTIYA VIDYA BHAVAN, KOLKATA
Class : Class 6
I do agree with Bhabani prasad

Ans 7:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 6
I ALSO AGREE WITH YOU ALL

Ans 8:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
We can express process v as deposition and how did condensation and freezing get involved

Post Your Answer

Pranat from LVIS, Noida
Subject :NSO    Class : Class 5

Shred a paper in tiny pieces. Take a comb and comb your hair. Now bring the comb closer to the paper pieces. What will you observe?

A The paper pieces will get repelled due to magnetic force.
B The paper pieces will get repelled due to electrostatic force.
C The paper pieces will get attracted and stick to the comb due to electrostatic force.
D The pieces will get attracted and stick to the comb due to frictional force.


Ans 1:

Ankita Dave from GNS, Bangalore
Class : Class 4
I prefer option C

Ans 2:

Vaibhav Elisetti from sri chaitanya techno school bavdhan, Pune
Class : Class 5
yup

Ans 3:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
The correct ans is option C because electrostatic force is a non contact force which is similar to magnetic force and the comb is like a magnet and tin pieces of paper are like the metal here (So the comb will attract the tiny pieces of paper).

Ans 4:

Shivangi from St. Michael's High School, Patna
Class : Class 5
The answer is C

Ans 5:

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

Post Your Answer

Vyom from St KABIR , Ahmedabad
Subject :NSO    Class : Class 5

Ans 1:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 5
this question makes no sense . 6 legs-can be an insect , eye on his forehead???

Ans 2:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3
Mammals do not have 3 eyes

Ans 3:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3
Mammals do not have 3 eyes

Ans 4:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 5
Is cow have 6 legs and 1 eye on its forehead

Ans 5:

Anil sinha from DPS, Chandigarh
Class : Class 4

Ans 6:

Shiven Bhakat from ,
Class :
Ans is D

Ans 7:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6
The answer is D.

Ans 8:

Adrito gayen from VMS, Kolkata
Class : Class 5
The answer is D. Hair on skin and breast feeding the young ones are characteristic of mammals such as cow. So, if really existed, this animal would have been placed with cow.

Ans 9:

DHANANJAY from HOLY GRACE, Mala
Class : Class 6
mammals do not have 6 legs and has more han 1 eye!

Ans 10:

arulmozhi ramesh from Kv, Coimbatore
Class : Class 9

Ans 11:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
If the animal really existed it would have belonged to the same group as cow.

Ans 12:

Anil sinha from DPS, Chandigarh
Class : Class 4
If this animal really existed it would have to be a monster that would eat us

Ans 13:

Anil sinha from DPS, Chandigarh
Class : Class 4

Ans 14:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
forehead? hahahahahahahahah

Ans 15:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
Yes but in the question it said that the animal was imanginative can't believe what type of an animal it was.

Ans 16:

Shivangi from St. Michael's High School, Patna
Class : Class 5
The answer is D

Ans 17:

Fareeha siddiqua from Janki Devi public school , Mumbai
Class : Class 5
It can't be D as they do not have six legs. no option is correct. I will report error for it is NOOT D

Ans 18:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
ans is DBECAUSE IT IS A IMAGINARY ANIMAL

Ans 19:

Jasmit kaur from Sun Valley International School, Vashundra
Class : Class 5
As this question is already wrong a mammal can not have 6 legs.

Post Your Answer

Michael Alexander from St. Thomas Public School, Thiruvanthapuram
Subject :NSO    Class : Class 5

Ans 1:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
answer is c sof is wrong

Ans 2:

Ankita Dave from GNS, Bangalore
Class : Class 4
In the solutions it is showing C as correct option but in front It is showing B as the answer to this question. please correct the answer.

Ans 3:

Samarth Sabari from GIIS, Singapore
Class : Class 5
how is it B!?

Ans 4:

Bhavya Agrawal from Cambridge Court High School , JAIPUR
Class : Class 6
WHY YOU TYPE SO MANY C Ishaan

Ans 5:

Ankush Ghosh from DPS, Doha
Class : Class 7
2 should be opaque and 1 transparent, or both opaque

Ans 6:

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

Ans 7:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 6
IF SOF CAN EXPLAIN THIS CORRECTLY, THEN I WILL STOP DOING PRACTICE OF ANY OLYMPIAD

Ans 8:

ishaani vats from shriram school, gurgaon
Class : Class 5
I could not find any logic in this answer. Can anyone explain it? THANS FOR READING!!!

Ans 9:

RIDHASEN PRIYASEN SHAH from The Rajkumar College, Rajkot, Rajkot
Class : Class 4
The solution itself explains that c is the correct ans. So that means m2 is opaque and m1 is transparent. Please someone correct this ans

Ans 10:

from kalyan, Kalyan
Class : Class 6
Blunders made by SOF. PLEASE FIX THIS !!!!!

Ans 11:

Samyaraj Chowdhury from DPS Ruby Park, Kolkata, Kolkata
Class : Class 6
The answer should be C. But answer is given B which is impossible.

Ans 12:

Ishaan Ahuja from TSMS, Noida
Class : Class 5
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 13:

ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Class : Class 5
ANSWER WILL BE 'C ' CAUSE THROUGH TRANSPARENT MATERIAL WE CANNOT SEE SHADOW OF A THING BUT THROUGH OPAQUE MATERIAL WE CAN SEE A THING'S SHADOW

Ans 14:

Mohul Gandhi from K V IIT Bombay Powai, Mumbai
Class : Class 4
ans should be c!!! I am reporting an error

Ans 15:

Devina kashyap from TPS, Mumbai
Class : Class 4
and should be C and i did C cut now it is showing that i have done B!!

Ans 16:

Srija Das from Sent Joseph Convent Chandannagar, Serampore
Class : Class 6
CORRECT ANSWER SHOULD BE C

Ans 17:

from St. Stephen's School, Kolkata
Class : Class 6
Ans is c as you see light can't pass through material 2 and can pass through material 1. According to SOF ans b which mean light can pass through cardboard and can't through clear pastic sheet!!!!!. Please correct this SOF or it can be a typing mistake. Thanks for reading.

Ans 18:

Ishaan Ahuja from TSMS, Noida
Class : Class 5
never use sof trainer they know nothing

Ans 19:

Arnav kaul from Chirec, Hyderabad
Class : Class 5

Ans 20:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 6
the answer is c 'cause material 1 is transparent and material 2 is opaque. The solution also says c. Typing error. Thanks for reading

Ans 21:

Aarush Thakur from DPS, Gurgaon
Class : Class 6
The sol says ans is C but it correct ans is B.

Ans 22:

legendary ninja from dps gurgaon, Gurgaon
Class : Class 7

Ans 23:

Ishir Jha from Keshav Saraswati Vidya Mandir, Patna
Class : Class 6
It explains c is the correct ans but on the front it says b. Someone please correct this. They cut my marks also.

Post Your Answer