National Science Olympiad Forum By SOF Olympiad Trainer - Page 651
  1. Home
  2. /  Forum

User Forum

Ask Your Question
jeeva from Kendriya Vidyalaya Kottayam, Kottayam
Subject :NSO    Class : Class 8

Post Your Answer

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

Ans 1:

Sagnik Roy from Nava Nalanda Santiniketan Shakha, Bolpur
Class : Class 8
D

Ans 2:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
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 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:

Devabhrith from Delhi Public School Electronic City Bangalore, Bengaluru
Class : Class 8
Hi The Answer is T/10Sub To my YT:SkyPeRtan Wolf

Ans 5:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
The answer is right - it should be T/10

Ans 6:

Mayank Mili from Delhi Public School, Golaghat
Class : Class 9

Ans 7:

DEEPTANGSHU DATTAGUPTA from DPS South Bangalore, BANGALORE
Class : Class 8
Here, in this example, the pendulum passes through y 21 times. So, it will do 10 complete oscillations and 1 half which is basically touching y. Therefore, the time period of the pendulum is T/10.

Ans 8:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 7
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllloooooooooooooooooooooooooooooooooooooooooooooo

Ans 9:

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

Ans 10:

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 11:

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

Ans 12:

Jaidev Chowdhary from Shamrock International School, VIJAYAWADA
Class : Class 8

Ans 13:

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 14:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
smsmsmsmsmmmsmsmsmsmsmsmsmsmsmfjjjjjjjjjjfjjfjfjfjfjfffffffffffffffyhhhhhhhhhhhhhhhhhhhhhhhhhhhhyhhhhhhhhhhyyyyyyyyyyyyyyyyujjjjjjjjjjjjjjjjikkkkkkkkkkkkkkkkkkkkkkkloooooooooooooooyhhhhhhhhhhhhhhhhbggggggggggggggghndcccccccccccccccccccchndcccccccccccccccccccccccccccedhyncccccccccccccccccccccccccccccccccccccccccccccccccccccchynedcccccccccccccccccccccccccchdenyccccccccccccedyhncccccccccccccccccccccccyyyyyyyyyyyyyyyyyyyyyyyyyyyyyydheycnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 15:

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 16:

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 17:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
it should be t/21

Post Your Answer

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

Ans 1:

Aarav Chopra from Springdales School, New Delhi
Class : Class 7
it is a direct change, so it does have to turn into liquid state

Ans 2:

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

Ans 3:

malhar thorve from city internqtional school, satara road, pune
Class : Class 7

Ans 4:

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

Ans 5:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
I ALSO AGREE WITH YOU ALL

Ans 6:

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

Ans 7:

Tanmay 2009 from MVN Aravali Hills, Faridabad
Class : Class 6
The answer is not B

Ans 8:

Rasha Ranjan from DPS NOIDA , Vaishali
Class : Class 6

Ans 9:

Aarav Chopra from Springdales School, New Delhi
Class : Class 7
same

Ans 10:

Aarav Chopra from Springdales School, New Delhi
Class : Class 7
ya

Ans 11:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is B because to turn Water vapour into ice you need Deposition but water vapour cannot be deposited that is why you first need to turn the water vapour to water by condensation and then to convert water to ice you need freezing . Hence answer B is correct

Ans 12:

Mayank Das from Army Public School Bolaram, Hyderabad
Class : Class 2

Ans 13:

KEERTHANA SHIBU from INDIAN SCHOOL GHOUBRA, Oman
Class : Class 7
NA

Ans 14:

Mayank Das from Army Public School Bolaram, Hyderabad
Class : Class 2

Ans 15:

RICHA BORAH from K V ANNA NAGAR, CHENNAI
Class : Class 7
I also agree with all of you . That's just impossible, I guess.

Ans 16:

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

Ans 17:

Agasthya S Ramkumar from Oakridge Internatioal School, Hyderabad
Class : Class 7
Guys you are wrong process name is deposition but you need to cool it to water then freeze it

Ans 18:

Sai Srivardhan from Maharishi Vidya Mandir Chetpet, Chennai
Class : Class 9
In process v, actually sublimation takes place

Ans 19:

Anamkhan Mulla from Navrachna Sama, Vadodara
Class : Class 7
easyyyyyyyyy

Ans 20:

Agasthya S Ramkumar from Oakridge Internatioal School, Hyderabad
Class : Class 7
easy

Ans 21:

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

Post Your Answer

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

Ans 1:

aadav sagar from indian school al ghubrah , muscat
Class : Class 6
6536e6w33346si7s7474r6ssxfge65eueskibidyohio fanomtax rizzler

Ans 2:

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 3:

Vaibhav Elisetti from sri chaitanya techno school Nallagandla, Hyderabad
Class : Class 7
yup

Ans 4:

Lakshana from SBOA School and Junior College, Chennai
Class : Class 6
it can also be said as static electricity

Ans 5:

Adeeth Baasu from Greenwood High, Bangalore
Class : Class 8
The answer is C

Ans 6:

Tanmay kaushal from ICSE, Mumbai
Class : Class 5
Class :C

Ans 7:

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

Ans 8:

Priyanshi Dubey from Ryan International school kandvali, Mumbai
Class : Class 7

Ans 9:

Pratham Dave from GNS, Bangalore
Class : Class 7
I prefer option C

Ans 10:

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

Post Your Answer

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

Ans 1:

Aanshi from Vibgyor High, Vadodra
Class : Class 8

Ans 2:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 8
Is cow have 6 legs and 1 eye on its forehead

Ans 3:

shaun joel dasari from subs, chennai
Class : Class 4
how can we tell what group is that animal if that doesn't exist

Ans 4:

VISHNU from NARAYANA OLYMPIAD GOPALAPURAM, chennai
Class : Class 5
I can say that they have fur but they don't have 6 legs and 1 eye on the forehead

Ans 5:

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

Ans 6:

Jasmit kaur from Sun Valley International School, Vashundra
Class : Class 7
As this question is already wrong a mammal can not have 6 legs.

Ans 7:

Anil sinha from DPS, Chandigarh
Class : Class 4

Ans 8:

adhiraj from Gundecha Education Academy, Mumbai
Class : Class 5
Firstly , mammals do not have three eyes, secondly which mammal has six legs ???????????

Ans 9:

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 10:

Shweta Garg from Vibgyor high, Vadodara
Class : Class 8
Mammals do not have 3 eyes

Ans 11:

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 12:

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 13:

Gautam from Surya the Global School, Hyderabad
Class : Class 7
IDIOTS just listen to them or maybe they are wrong

Ans 14:

Anil sinha from DPS, Chandigarh
Class : Class 4

Ans 15:

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

Ans 16:

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

Ans 17:

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

Ans 18:

Aniruddh Singh from Premia Academy , Hydrabad
Class : Class 7
This is impossible because a cow has four legs not 6 legs and also it has two eyes not one eye and those two eyes are not on the forehead

Ans 19:

Shweta Garg from Vibgyor high, Vadodara
Class : Class 8
Mammals do not have 3 eyes

Ans 20:

Riddhik Bose from Vibgyor High, Airoli, Mumbai
Class : Class 9
ydejkcdhbjxdjkdajkdsjhdasjhdajhsadhjdaj

Ans 21:

Adrito gayen from VMS, Kolkata
Class : Class 9
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 22:

Shiven Bhakat from ,
Class :
Ans is D

Ans 23:

arulmozhi ramesh from Kv, Coimbatore
Class : Class 9

Ans 24:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
Idiots, the monster fed milk to its young, a feature seen only in Mammals

Ans 25:

Syeda Aleeza Zaidi from Somerville school Noida , Noida
Class : Class 5
I thought this could be an insect as it HAS SIX LEGS. And some spiders( I know they are not insects ) have more than two eyes so it could be possible that the correct answer is b. But it has fur and is feeding its young one milk so the answer should be d

Ans 26:

SANVI ROHILLA from The little shri, Rohtak
Class : Class 5
Ans D ( Cow)

Ans 27:

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 28:

Saipriya from Sankara, Chennai
Class : Class 9
All report an error they give all wrong only

Ans 29:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 8
this question makes no sense . 6 legs-can be an insect , eye on his forehead???

Ans 30:

Aniruddh Singh from Premia Academy , Hydrabad
Class : Class 7
This is impossible cow only as four legs and two eyes and those two are not on the forehead

Ans 31:

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

Post Your Answer

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

Ans 1:

Samyaraj Chowdhury from DPS Ruby Park, Kolkata, Kolkata
Class : Class 8
The answer should be C. But answer is given B which is impossible.

Ans 2:

Bhavya Agrawal from Cambridge Court High School , JAIPUR
Class : Class 8
WHY YOU TYPE SO MANY C Ishaan

Ans 3:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 4:

ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Class : Class 8
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 5:

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

Ans 6:

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

Ans 7:

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 8:

Shreyan from Delhi Public School Bangalore East, Bangalore
Class : Class 5
how is it b

Ans 9:

Ishaan Ahuja from TSMS, Noida
Class : Class 6
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 10:

Tanvi from hh, delhi
Class : Class 5
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Ans 11:

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 12:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8
It explains c is the correct ans but on the front it says b. Someone please correct this. They cut my marks also.

Ans 13:

Ishaan Ahuja from TSMS, Noida
Class : Class 6
never use sof trainer they know nothing

Ans 14:

samanvay sinha from School of India, Bangalore, bengaluru
Class : Class 5
There must be a technical issue because when I read the solution, it was written that the correct answer is C.

Ans 15:

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

Ans 16:

Pratham Dave from GNS, Bangalore
Class : Class 7
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 17:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
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 18:

Ankush Ghosh from DPS, Doha
Class : Class 10
2 should be opaque and 1 transparent, or both opaque

Ans 19:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 7
The ans should be C.

Ans 20:

Jishnu Dutta from St. Stephen's School, Kolkata
Class : Class 9
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 21:

Shreyan from Delhi Public School Bangalore East, Bangalore
Class : Class 5
howwwwwwww ccccccccccc

Ans 22:

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 23:

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

Ans 24:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 25:

Sunishka Khatri from Global Indian International School, Pune
Class : Class 6
The guys who solved the paper and created this test was in hurry. So he did not take efforts to review his answers, hence many answers are wrong here. How will students trust on these guys?

Ans 26:

Srija Das from Sent Joseph Convent Chandannagar, Serampore
Class : Class 10
CORRECT ANSWER SHOULD BE C

Ans 27:

Mohul Gandhi from Podar International School, Powai, Mumbai
Class : Class 8
ans should be c!!! I am reporting an error

Ans 28:

Samarth Sabari from GIIS, Singapore
Class : Class 9
how is it B!?

Ans 29:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 10
IF SOF CAN EXPLAIN THIS CORRECTLY, THEN I WILL STOP DOING PRACTICE OF ANY OLYMPIAD

Post Your Answer

Bhavya Jha from Global City International School, Bangalore, Karnataka, India
Subject :NSO    Class : Class 5

Ans 1:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru
Class : Class 6

Ans 2:

Harjot Singh from GIIS KL, Kuala Lumpur
Class : Class 4
THE CORRECT ANSWER SHOULD BE 5492

Ans 3:

Harjot Singh from GIIS KL, Kuala Lumpur
Class : Class 4

Post Your Answer

Debraj Das adhikary from Ramakrishna mission vidya bhaban , midnapore, Midnapore
Subject :NSO    Class : Class 10

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
These are referred to as X-linked genes.

Post Your Answer

param ahuja from m.p.s, Ajmer
Subject :NSO    Class : Class 7

Ans 1:

param ahuja from m.p.s, Ajmer
Class : Class 9
HOW'

Ans 2:

Angad Paruthi from Army Public School, Kamraj Marg, Bangalore
Class : Class 7
njkhugbvfjdnvog3ngv;3oinv/

Ans 3:

Iba Khan from DPS , Noida
Class : Class 8
Why not b

Ans 4:

Nandu from The Asian School, Bahrain
Class : Class 3
D is the ans

Post Your Answer