National Science Olympiad Forum By SOF Olympiad Trainer - Page 778
  1. Home
  2. /  Forum

User Forum

Ask Your Question
SAGNIK CHAKRABORTY from DELHI PUBLIC SCHOOL , KOLKATA
Subject :NSO    Class : Class 5

Ans 1:

Shriyann from Suniti Devi Singhania School, Thane
Class : Class 9

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Mechanical force is the only correct answer .

Ans 3:

Syeda Aleeza Zaidi from Somerville school Noida , Noida
Class : Class 5
How it is d???Shouldn't it be c

Ans 4:

Aishee Sarkar from St. Stephens School , Kolkata , West Bengal, Kolkata
Class : Class 4
answer D

Ans 5:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
how???????????????????????????????????????????????????????????????????????????is mechanical?????????????????????????????????????????????????????????????????

Ans 6:

TRINABH PANDA from NPSI, Chennai
Class : Class 6
actually it is contact force .But SOF is mad so it said the wrong answer but the correct answer is CONTACT FORCE

Ans 7:

Mrigank Roy from Delhi Public School Ghaziabad, Ghaziabad
Class : Class 10
How is it mechanical? Please explain

Ans 8:

SANVI ROHILLA from The little shri, Rohtak
Class : Class 5

Ans 9:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
mechanical

Ans 10:

Trideev Reddy Maddirevula from IIPS, Riyadh
Class : Class 7
push and pull are examples of mechanical force

Ans 11:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5
how???

Ans 12:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 10
Mechanical Force

Ans 13:

SARVESH RAMESH from DPS MIS, QATAR
Class : Class 10

Ans 14:

Vaibhav Elisetti from sri chaitanya techno school Nallagandla, Hyderabad
Class : Class 7
the corect answer is C

Ans 15:

Thejas S from Gopalan International School, Bangalore
Class : Class 3
c is correct

Ans 16:

Daksh from RKC, Rajkot
Class : Class 8
How the answer is D . Mechanical force

Ans 17:

Haroon T K from Silver Hills public school , Calicut
Class : Class 5
how?

Ans 18:

Daksh from RKC, Rajkot
Class : Class 8

Ans 19:

Biju Pappachan from Rkc , Raipur
Class : Class 1
I did C frictional force but SOF says it is D mechanical force. How is it mechanical force?

Ans 20:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
mechanical

Ans 21:

Atul Sanjeev from Indian School Al Ghubra, Muscat
Class : Class 9
how is it mechanical force?

Ans 22:

Arnav kaul from Chirec, Hyderabad
Class : Class 2

Ans 23:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
mechanical

Ans 24:

Aaditva from Vasant Valley School, New Delhi
Class : Class 5
how??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Ans 25:

Goutham Ram from Lecole' Chempaka International, Trivandrum
Class : Class 5
I was about to get 10/10 this 1 made me lose it.

Ans 26:

Shruti Rajshree from NPS Indiranagar, Bengaluru
Class : Class 3
Can somebody explain why it is mechanical force ????

Ans 27:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
how is it mechanical?

Ans 28: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Mechanical Force.

Ans 29:

Arghya Kashyap from Modern Delhi Public School, Faridabad
Class : Class 8

Ans 30:

VAIBHAVH RAMESH from NARAYANA ETECHNO WHITEFIELD, BANGALORE
Class : Class 5

Ans 31:

Rohan TR from Sri Aurobindo memorial school, Bangalore
Class : Class 6
It is frictional force

Ans 32:

Rimi from TLISK, pune
Class : Class 9
The answer given by SOF is wrong so they have not given the solution to this question.

Ans 33:

VAIBHAVH RAMESH from NARAYANA ETECHNO WHITEFIELD, BANGALORE
Class : Class 5

Ans 34:

Rudra Tripathi from DPS Noida, Noida
Class : Class 10
Mechanical force

Ans 35:

Pratham Dave from GNS, Bangalore
Class : Class 7
It is option C

Ans 36:

ARYAN DAS from LOKHANDWALA FOUNDATION SCHOOL, MUMBAI
Class : Class 8
how is it mechanical ????????????

Ans 37:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
It is mechanical

Ans 38:

Gauransh Singla from DPS , Navi Mumbai
Class : Class 5

Post Your Answer

NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

Post Your Answer

Ashher Pervez from DPS Bhilai, Bhilai
Subject :NSO    Class : Class 5

Ans 1:

Pallav Agarwal from DLF PUBLIC SCHOOL SAHIBABAD, Ghaziabad
Class : Class 10
it is d.sof posted wrong answer

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 3:

Devrajan from Amity International School, Noida
Class : Class 8
The pesticide is partially effective because there is a drop in population after each spraying. Hence, B CANNOT BE THE CORRECT ANSWER.

Ans 4:

Rimi from TLISK, pune
Class : Class 9
Answer is B akenis withis ve

Ans 5:

Mannan from Sherwood High, Bengaluru
Class : Class 7
I think the right answer should be C as when the 3rd spray was conducted the pest started to increase hence right answer answer is CThank you for appreciating me

Ans 6:

Sumit Biswal from Dps gandhinagar, Gandhinagar
Class : Class 7
D cannot be correct because it increased after 3rd and 4th spray

Ans 7:

Rishit Garg from Bhavan s B P Vidya Mandir , Nagpur
Class : Class 9
If b is the answer then why is the bar graph increasing day by day.😠

Ans 8:

navya ritika from DPS TAPI, SURAT
Class : Class 9

Ans 9:

Abhigyan Panja from HEMSHEELA MODEL SCHOOL, DURGAPUR
Class : Class 5

Ans 10:

Swastik Srivastava from Baldwin Boys High School, Bangalore
Class : Class 5
wrong

Ans 11:

shalini mittal from DPS Greater Noida, Greater noida
Class : Class 4
answer is b only because it is decreasing also

Ans 12:

Bhavya from ABC, Delhi
Class : Class 7
it should be 'D' but SOF shows the graph is decreasing and increasing which is not possible. it is the wrong graph as this can't happen.

Ans 13:

Sumit Biswal from Dps gandhinagar, Gandhinagar
Class : Class 7
C

Ans 14:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
It is C because after the guy used the 3rd and 4th pesticide the insects started increasing

Ans 15:

Arav Gupta from Delhi Public School Gurgaon, Gurgaon
Class : Class 8
B is answer because when it decreases it is their natural death, otherwise they have become resistant thats why it is decreasing then increasing and not uniform.

Ans 16:

Hitarth Bhardwaj from Teoler High School, Jaipur
Class : Class 6
D

Ans 17:

Praatham Kumar from DPS NERUL NAVI MUMBAI, Navi Mumbai
Class : Class 5
IF B IS ANSWER THAN GRAPH SHOULD BE ALMOST UNIFORM.. THE GROWTH IS INCREASING AFTER 3RD-4TH SPRAYING

Ans 18:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
it is supposed to be D. the graph should be going down slowly and not increasing if the answer was B.

Ans 19:

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

Post Your Answer

Ashher Pervez from DPS Bhilai, Bhilai
Subject :NSO    Class : Class 5

Ans 1:

Radhika Gupta from Dps civil lines aligarh , Aligarh
Class : Class 8

Ans 2:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
(B) or (C)?

Ans 3:

Rishita Verma from Suncity School, Gurgaon
Class : Class 5

Ans 4:

Pratham Dave from GNS, Bangalore
Class : Class 7
B is the answer to this question

Ans 5:

Yash Manjunath Neeralagi from JSS Public School, Bangalore
Class : Class 6

Ans 6:

Amal Amzath Ali from jss international school, dubai
Class : Class 7

Ans 7:

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

Ans 8:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9

Ans 9:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6

Ans 10:

Ashwak from Cambridge, Jalandhar
Class : Class 9

Ans 11:

Radhika Gupta from Dps civil lines aligarh , Aligarh
Class : Class 8

Ans 12:

Niranjhan Rajeshkumar from Deens Academy, Whitefield, Bengaluru
Class : Class 8
It is "B". People who put "a" mixed up x

Ans 13:

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

Ans 14:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
A

Ans 15:

Amal Amzath Ali from jss international school, dubai
Class : Class 7

Ans 16:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 17:

Ishaan Singhal from CCWS, Jaipur
Class : Class 5

Ans 18:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 19:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
ANS B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 20:

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

Ans 21:

Adhira Suresh from Vaels parent grade 3, chennai
Class : Class 6
Confusion between (B) and (C)

Post Your Answer

Manit Aggarwal from St. Patricks Academy Bengaluru, Bangalore
Subject :NSO    Class : Class 1

Post Your Answer

Neevedita Singh from Auxilium Convent School Dum Dum, Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Neevedita Singh from Auxilium Convent School Dum Dum, Kolkata
Class : Class 7
I got the answer ........Its option (C) SPLEEN

Post Your Answer

Manit Aggarwal from St. Patricks Academy Bengaluru, Bangalore
Subject :NSO    Class : Class 1

Ans 1:

Manit Aggarwal from St. Patricks Academy Bengaluru, Bangalore
Class : Class 8
manit d is the answer

Post Your Answer

Khwahish Sharma from Oakfield Public School , Jaipur
Subject :NSO    Class : Class 7

Ans 1:

Krishna Kabra from Magarpatta City Public School, Pune
Class : Class 8
Options B and D are correct

Post Your Answer

Bhabani Prasad from Narayan School, Kolkata
Subject :NSO    Class : Class 5

Ans 1:

Soham Sharma from Kiit International School, Bhubaneswar
Class : Class 6
The correct answer should be B because it has a hairy structure and it can be dispersed by wind .nor its written that this is Xanthium

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Can't understand

Ans 3:

Ahaan Mittal from Primus Public School, Bengaluru
Class : Class 8
it is dandelion isn't it??? i think it is wind because hair and size

Ans 4:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
The picture is not clear and it cannot be said that it is a xanthium neither can it be said it is a dandelion. I went with B. Please show better qualities pictures sof.

Ans 5:

krishneil from Elpro international school, Pune
Class : Class 6
The picture given did not look like xanthium neither dandelion ,so it looked like dandelion to me so I went with (B)Please give better images

Ans 6:

shaun joel dasari from subs, chennai
Class : Class 4
how is this possible

Ans 7:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
The correct option is (C) or (B)?

Ans 8:

Priyanshi Singh from Deens Academy Bangalore, Bangalore
Class : Class 5
The image looks nothing like cocklebur. It has to be a bit more clear,

Ans 9:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6
It is Xanthium which is dispersed by animals.

Ans 10:

Shreetej from Pearson public school, Pune
Class : Class 5
it is C as it is a Xanthium

Ans 11:

Aabhineet Patnaik from Lakshya International School, Kakinada
Class : Class 5
Correct answer is A !!! As it is having hair like structure so, it is carried by wind

Ans 12:

shubhavi Dhondge from NPS, Banagalore
Class : Class 9
even I went with B

Ans 13:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 10
You are correct ans. is B wind because it seems to be light in weight and also hairs that acts like feathers and also wind can carry only light weight seeds.

Ans 14:

Vihaan Patil from Bombay Scottish School, Mahim Mumbai
Class : Class 6
the damn picture needs to be clear

Ans 15:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
Its B

Ans 16:

Nidhi Upadhyaya from S M shetty HIgh school, Mumbai
Class : Class 8

Ans 17:

Shubham Majhi from Sri Chaitanya Techno School, Bangalore
Class : Class 5

Ans 18:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
I think that laksmi is saying correct because we cannot diffrentiate them as it is not clear that they are spines like in xanthium or feather like in dandelion

Ans 19:

NIVED PRAKASH NAIR from SARVODAYA, THIRUVANANTHAPURAM
Class : Class 8
The Xanthium IS dispersed by animals

Ans 20:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10
D

Ans 21:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
it has hair like structure

Post Your Answer

yash kirpalani from st gregorios high school chembur, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

Anas Matin Barmare from DPS, Dubai
Class : Class 8
Hey, mathamagician. Uh it could also be April 3 since the dates might differ by a few days due to there being many sources.

Ans 2:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10

Ans 3:

Bhavya from ABC, Delhi
Class : Class 7
IT IS JUST ON MY BIRTHDAY SO I REMEMBER IT. OPTION C IS THE ANSWER

Ans 4:

suday ghai from DPS NOIDA, GAUTAM BUDDHA NAGAR
Class : Class 5
I HAD CONFUSION WITH A AND C

Ans 5:

Shreyansh Gupta from MVN, faridabad
Class : Class 7
ans is a April 3 1984 not ans c

Ans 6:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
the answer is 2nd april 1984 i got confused

Ans 7:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi
Class : Class 10

Ans 8:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 10
Answer is A April 3, 1984

Ans 9:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
(A) is the correct answer

Ans 10:

Mathamagician from BGSNPS, Bengaluru
Class : Class 6
No, it is actually none, it was on 2nd April 1984.

Ans 11:

Pratham Dave from GNS, Bangalore
Class : Class 7
A is the answer to this question

Ans 12:

Bhavya from ABC, Delhi
Class : Class 7
IT IS IN 1984 WHEN MY MOTHER WAS BORN.

Ans 13:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5

Post Your Answer