National Science Olympiad Forum By SOF Olympiad Trainer - Page 770
  1. Home
  2. /  Forum

User Forum

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

Ans 1:

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

Ans 2:

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 3:

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 4:

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

Ans 5:

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 6:

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

Ans 7:

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 8:

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

Ans 9:

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

Ans 10:

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 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

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 16:

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 17:

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

Ans 18:

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

Ans 19:

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

Ans 20:

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 21:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Post Your Answer

Adrita Bhattacharya from MERIDAN SCHOOL, KALYAN
Subject :NSO    Class : Class 3

Ans 1:

Navneeth Reejish from Yuvabharati International school, Singapore
Class : Class 7
(D) IS THE ANSWER

Ans 2:

Pratha Borar from Jayshree Periwal International School, Jaipur
Class : Class 5
(A) Nomads

Post Your Answer

Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 6

Ans 1:

Tanishkchamp from Saint Francis English medium school, Bandikui
Class : Class 8
OPTION A IS CORRECT NO CHANCE OF WRONG

Ans 2:

Shreyasi Padihary from National Public School East , Bengaluru
Class : Class 7
In option A, sunflower and paddy should be interchanged as sunflower has taproot and paddy has fibrous root system. Option D is the correct answer as wheat, maize and paddy have fibrous roots and sunflower, carrot and radish have taproot

Ans 3:

Kushal from Chirec, Hyderabad
Class : Class 7
the answer is d

Ans 4:

Preetham Sivalingam from Delhi Public School Bangalore East, Bengaluru
Class : Class 7
Option a is correct.

Post Your Answer

Murukesh from KV Jipmer Campus Shift 2, Pondicherry
Subject :NSO    Class : Class 5

Post Your Answer

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

Ans 1:

Mathamagician from BGSNPS, Bengaluru
Class : Class 6
I thought it was c), but it is d). People who think it is b), are all fools

Ans 2:

Taksh from Delhi Public School, Secunderabad
Class : Class 6
answer should be b right

Ans 3:

Adarsh Kamath from DPS Whitefield, Bangalore
Class : Class 6
you both are wrong.the correct answer is B

Ans 4:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
The correct ans is B

Ans 5:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
where is the solution

Ans 6:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 8
b

Ans 7:

Taksh from Delhi Public School, Secunderabad
Class : Class 6
answer should be b

Ans 8:

aatmaj sharma from HAPS HAMIRPUR HP, HAMIRPUR
Class : Class 9
according to me the correct answer is B

Ans 9:

marika from VTS, Mumbai
Class : Class 4

Ans 10:

Dhriti Das Purkayastha from Inventure Academy, Bangalore
Class : Class 7
the correct answer is D as in B there is no mention on what X is

Ans 11:

Shanaya Siddhartha from Bal Bharati Public School, Navi Mumbai
Class : Class 3
clearly answer B is correct

Ans 12:

Aaditva from Vasant Valley School, New Delhi
Class : Class 5
B is the correct answer. According to me

Ans 13:

dhairya mittal from vidyashram international school jodhpur, Jodhpur
Class : Class 5
C IS CORRECT

Ans 14:

Saipriya from Sankara, Chennai
Class : Class 9
A is only correct

Ans 15:

Ishaan Ahuja from TSMS, Noida
Class : Class 6
the ans is *BBBBBBBBBBBBBBB*

Ans 16:

Prath from Vibgor High, Bangalore
Class : Class 10
Even I think the correct answer is B

Ans 17:

Sharanya Saini from Frank Anthony Public school, New Delhi
Class : Class 5
the answer is option D

Ans 18:

Anil sinha from DPS, Chandigarh
Class : Class 4

Ans 19:

Rimi from TLISK, pune
Class : Class 9
Mathamagician, we should not say anyone fool. Please keep in mind

Ans 20:

madhav from null, null
Class : Class 5
it is written select the incorrect statement

Ans 21:

MAHARU KAWATO from GLOBAL INDIAN INTERNATIONAL SCHOOL, TOKYO
Class : Class 5
I think my answer is right

Ans 22:

ABCDE from admin, Noida
Class : Class 9
c is the correct answer

Ans 23:

Amaan Alam from JSS Private School , Dubai
Class : Class 5
B is the correct answer

Ans 24:

Shreejit Hadavale from Sanskriti School, Pune
Class : Class 5
Dd

Ans 25:

Rimi from TLISK, pune
Class : Class 9
B is the correct answer.

Ans 26:

aatmaj sharma from HAPS HAMIRPUR HP, HAMIRPUR
Class : Class 9

Ans 27:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
b answer, wrong question

Ans 28:

Anika Saha from New Town School, KOLKATA
Class : Class 6
the answer is B

Ans 29:

Adarsh Kamath from DPS Whitefield, Bangalore
Class : Class 6
you both are wrong.the correct answer is B

Ans 30:

Lakshana from SBOA School and Junior College, Chennai
Class : Class 6
D is only correct as in option B they have given that Z can be emu but emu has both wings and feathers and it is a flightless bird

Ans 31:

Aditya from Glendale Academy, Hyderabad
Class : Class 5
it is 'b'

Ans 32:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
if you have problem please report it

Ans 33:

Ronav Kerkar from Jamnabai Narsee School, Mumbai
Class : Class 7
SHOULD BE B

Ans 34:

Anahita Baruah from DPS Bangalore East, Bengaluru
Class : Class 3
Bats have wings and no feathers. Ostriches and Emus have both feathers and wings, but they can’t fly mainly due to their huge size. Penguins have feathers and flippers (not wings). “A” is incorrect as bats doesn’t have feathers. “B” is incorrect as penguins doesn’t have wings. “C” is incorrect as there are birds that has both feathers and wings. “D” is the correct answer

Ans 35:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 8
b

Ans 36:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
The answer has to be b. Come on SOF.

Ans 37:

Syed Mohammad Hussain from ISAM, Muscat
Class : Class 8
d

Ans 38:

from ,
Class : Class 5
Answer is b

Ans 39:

Mannan from Sherwood High, Bengaluru
Class : Class 7
Hey many people are thinking answer B is right .well, yeah according to me ans B is right .these SOF people really need to improve and update this app

Ans 40:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
A is correct

Ans 41:

D M Sarvesh from Narayana Group of Schools, Mogappair
Class : Class 4

Ans 42:

anirudh pratap singh parihar from RAMJAS SCHOOL ANAND PARVAT, DELHI
Class : Class 7
well we can say that ans d is correct because emu has both the features mentioned in the question while option b describes only one of them

Ans 43:

Ybbn from Alphabet International School, Chennai
Class : Class 5
The answer is d because they ask which is " INCORRECT", AND OPTION B IS THE CORRECT OPTION, AND BOTH A AND C ARE INCORRECT. AS THEY HAVE ASKED INCORRECTLY, THE ANSWER IS D, AS BOTH A AND C ARE WRONG.

Ans 44: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 45:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
answer should be B

Ans 46:

Ybbn from Alphabet International School, Chennai
Class : Class 5
I DON'T UNDERSTAND, CLARIFY MY DOUBT QUICKLY SIR OR MADAM

Ans 47:

Ayush Yadav from Salwan Public School, Gurgaon
Class : Class 6

Ans 48:

Ayush Yadav from Salwan Public School, Gurgaon
Class : Class 6
Answer D is correct

Ans 49:

Anaisha from Hsss, Chennai Dr
Class : Class 5
B is correct

Ans 50:

sauradeep from j v m Shyamali , ranchi
Class : Class 10
B

Ans 51:

Mystic Girl from NPS, Bnagalore
Class : Class 6
The correct answer is D

Ans 52:

Deeptajit Roy from Gems Modern Academy, Dubai
Class : Class 10
Organism X is actually emu, because it has wings AND feathers. So correct answer is D.Answer B however is wrong, as it tells emus ONLY have feathers. Answer C is wrong as organism X can be any bird, even penguins. And answer A is also wrong as bats don't have feathers and ostriches have wings too.

Ans 53:

Riya Nambiar from The Sanskaar Valley School, Bhopal
Class : Class 10
Fe facts:1) Ostriches have wings, though it is not used for flying.2) Bats do not have feathers. They have hairs like other mammals.3) Emu has wings and again not used for flying.4) A penguin has feathers.5) Almost all birds have wings and feathers.So, option D is the only one that seems right.

Ans 54:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
But the correct answer according to SOF is option D

Ans 55:

Aarnav from FIA, Nashik
Class : Class 6
According to me the answer is B.

Post Your Answer

PRIYANSH PAL from GRM, BAREILLY
Subject :NSO    Class : Class 9

Ans 1:

pm from amity , noida
Class : Class 9
oil has a low boiling point than water. Therefore we use oil to make the cooking process faster and easier

Ans 2:

Aditya Prasad from Notre Dame , Gumla
Class : Class 9
We fry stuff in oil because oil has much higher boiling point in comparison to water. So after heating when oil reaches temperatures greater than the boiling point of water (100 C) it instantly vaporize the water present in food into steam. ... Oil fries it and gives a crispy texture.

Ans 3:

pm from amity , noida
Class : Class 9
oil has a low boiling point than water. Therefore we use oil to make the cooking process faster and easier

Post Your Answer

Vihaa Sharma from Global Indian International School Tokyo, Tokyo
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

Post Your Answer

SAANVI.SHUKLA from DELHI PUBLIC SCHOOL, NOIDA
Subject :NSO    Class : Class 2

Ans 1:

muskan kapoor from muskan kapoor, Amritsar
Class : Class 8

Ans 2:

Arnav Basu from faps, Bengaluru
Class : Class 6
a is theaa is the answer.

Ans 3:

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

Ans 4:

Kitika Kothari from Ramniwas Bajaj High School, Mumbai
Class : Class 4
The answer is D as the pictures given have different hazards.

Post Your Answer

Sanjana Iyer from HFS Powai, Mumbai
Subject :NSO    Class : Class 6

Ans 1:

SUHANI PANDA from DE PAUL SCHOOL, BERHAMPUR
Class : Class 8
I think it's option (C) as plastic bags are harmful for environment.

Ans 2:

SUHANI PANDA from DE PAUL SCHOOL, BERHAMPUR
Class : Class 8
I think it's option (C) as plastic bags are harmful for environment.

Post Your Answer