National Science Olympiad Forum By SOF Olympiad Trainer - Page 650
  1. Home
  2. /  Forum

User Forum

Ask Your Question
from ,
Subject :NSO    Class : Class 4

Ans 1:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
salt

Ans 2:

Aryan Bomanwar from Chirec international School, HYDERABAD
Class : Class 6
It's C coffee powder.

Ans 3:

Student from School, City
Class : Class 8

Ans 4:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
It's chalk powder

Ans 5:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 8
salt for the way

Ans 6:

Riddhima Pandey from Chinmaya Vidyalaya, Bokaro Steel City
Class : Class 3
Ans-d

Ans 7:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
why is chalk powder the correct answer?

Ans 8:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 9
The correct answer is C . It will be coffee power.

Ans 9:

Manan thorat from Podar powai, Mumbai
Class : Class 4
The answer is D because D cant desolve in water while others can.So the answer is D.

Ans 10:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Coffee Coffee Coffee Coffee Calls out Calls out the answer is C in the answer it is me it is me it is me

Ans 11:

Yajur Nag from dps vk, delhi
Class : Class 5

Ans 12:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
It's chalk powder

Ans 13:

Ashwak from Cambridge, Jalandhar
Class : Class 9
chalk powder is insoluble in water while others are soluble, chalk powder can be separated from water by sedimentation and decantation or filtration but others need evaporation...… Now I think Harsh you understood why the answer is D!!

Ans 14:

Naitik Banerjee from DPS Ruby Park Kolkata, Kolkata
Class : Class 6
The correct answer is d

Ans 15:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 8

Ans 16:

Saarang roy from Indian school ghubra, Muscat
Class : Class 6
The correct answer is d chalk powder because it is insoluble in water while the rest are not.

Ans 17:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
coffee powder

Ans 18:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
coffee powder

Ans 19:

Anika S Kumar from Alphabets International school , Chennai
Class : Class 7
Coffee powder

Ans 20:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
my actual answer is salt

Post Your Answer

Yajur Nag from dps vk, delhi
Subject :NSO    Class : Class 4

Ans 1:

Aalia Nair from Bombay Scottish School Mahim, Mumbai
Class : Class 4
4 IS THE CORRECT ANSWER

Ans 2:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
There is no semicircle.Answer is 4.

Ans 3:

SATVIK SHARMA from DPS AGRA, AGRA
Class : Class 7
IT SHOULD BE 5 AS THERE IS SQUARE TRIANGLE SEMECIRCLE RECTANGLE AND DIAMOND

Ans 4:

Mayukh chatterjee from Somerville School Noida, Noida
Class : Class 5
why semicircle not be counted

Ans 5:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
How 5? answer is 4The shapes are:circle,triangle,rectangle and square

Ans 6:

Shaurya Shrivastava from Amanora school, Pune
Class : Class 6
all listen it should be 5 as i think because the rectangle is dividing the circle into two halves which is forminig a semi circle and if sof has to 4 which means that it should be a whole shape like circle triangle etc.so if it is wholes shape SOF is right or elseNiteen Jit Sahu and all others who say semi circle are right

Ans 7:

Daksh Chanani from Sri Sri academy, Kolkata
Class : Class 8
SEMICIRCLE5B

Ans 8:

Avya Pandey from NPS International, Singapore
Class : Class 8
b as there is a semi-circle

Ans 9:

Sahanaa from Sancta Maria International School, Hyderabad
Class : Class 8
How are we supposed to know it’s a rectangle when hidden by the circle ,bonne nuit

Ans 10:

ayurda prasad from Delhi Public School, Faridabad
Class : Class 3
ayurda 4 d 4

Ans 11:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
semicircle is there but made by square so the answer is 4

Ans 12:

Abhinav Kulkarni from National Centre For Excellence, Bengaluru
Class : Class 4
55555555555555555555555555555555555555555 is the ans

Ans 13:

Shaurya Shrivastava from Amanora school, Pune
Class : Class 6

Ans 14:

from ,
Class :
5

Ans 15:

PARTH PANCHAL from NEW HORIZON SCHOLARS SCHOOL, THANE
Class : Class 7
the answer can even be 'B' as semi-circle is there ,made by square

Ans 16:

Niteen Jit Sahu from Diya Academy of Learning, Bengaluru
Class : Class 7
5 is the answer because there is even semi circle there with rectangle,square and triangle.

Ans 17:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7
Can you tell the answer of this question

Ans 18:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is D) 4

Ans 19:

Gunnit Kant from DPS, Nerul, Navi Mumbai
Class : Class 7
its d

Ans 20:

Aarav sugla from Niraj International School , Secunderabad
Class : Class 5

Ans 21:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
5

Post Your Answer

Rehan Agrawal from Indian School Ghubra, Muscat
Subject :NSO    Class : Class 8

Ans 1:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
The answer should be D

Ans 2:

Bipasana from KV IIT Kanpur, Kanpur
Class : Class 9
The answer is A.

Ans 3:

Aanya from DAV, Gurgaon
Class : Class 8
I think that option "D" is the correct answer as friction is always opposite to direction of motion of the object

Ans 4:

Vayun from NPS HSR, Bengaluru
Class : Class 8
Answer is D

Ans 5:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
the answer is D but is given wrong in this question .

Ans 6:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
I ALSO THINK THE ANSWER IS D

Ans 7:

Spandan Trivedi from D.A.V. International School, Ahmedabad
Class : Class 8
Yes answer is D

Ans 8:

Anirudh from 989820Delhi Pubic school Rohini , Delhi
Class : Class 8
D

Ans 9:

Rishi Gopi from Loyola, Trivandrum
Class : Class 9
The correct answer is d as friction acts opposite to the direction of the applied force

Ans 10:

Rishi Gopi from Loyola, Trivandrum
Class : Class 9

Ans 11:

Antarik Maity from Bharatiya Vidyabhaban, Kolkata
Class : Class 8
How can the direction of friction be towards east? It should always act in the direction opposite to that of the direction of the moving body, i.e., friction should act towards the west irrespective of whether the vehicle is accelerating or retarding. So the correct answer should be D!

Ans 12:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
see guys, i think u all are mistaken. We dont consider in what direction the car is going, but in which direction the wheel is turning. for the car to go forwards, the wheel must roll clockwise. so for the car to go east, wheel must roll in the clockwise direction. Now consider a very small part of the wheel which is touching the ground. to wheel to roll in clockwise direction , that small part must slide backward, and that must continously happen in order for wheel to turn clockwise and car to go in east direction. And u know, friction is b/w the surface in contact, i.e the rolling part of the wheel, not with the car. so friction should oppose the backward-going part of the wheel, and thus in the ame direction with the motion of the car. if friction were to be in west, the car would never go in east direction, because the wheel would'nt have any force to oppose, to make it go in that direction, and thus the car would never be able to go towards the east direction!

Ans 13:

Arnav Gangwar from DPS NOIDA, GAUTAM BUDH NAGAR
Class : Class 8

Ans 14:

Mridul Jain from Shishukunj International School Indore, Indore
Class : Class 9
I'm confused about the same thing...friction opposes relative motion, so it will obviously be towards west??

Ans 15:

Rehan Agrawal from Indian School Ghubra, Muscat
Class : Class 10

Ans 16:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 17:

Palchin from Naval public school, Uran
Class : Class 8
the answer has to be d because friction always oppose the relative motion of an object no matter if it accelerates or not.

Ans 18:

from ,
Class :
Answer is d

Post Your Answer

Swarnava Pal from Vivekananda Mission School, Haldia
Subject :NSO    Class : Class 4

Ans 1:

Khanak Jha from Prime Academy, Mumbai
Class : Class 4
it is wrong

Ans 2:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
25341

Ans 3:

Dakala Murari from Indian school of excellence, Bangalore
Class : Class 4
c

Ans 4:

Shaurya from Modern Public School, Bhiwadi
Class : Class 7
C

Ans 5:

Shaurya from Modern Public School, Bhiwadi
Class : Class 7
C because 25341 spells stick

Ans 6:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
25341

Post Your Answer

from ,
Subject :NSO    Class : Class 4

Ans 1:

Samarth Vijay Yeliathaya from Shri Kumarans Children home,cbse, Bangalore
Class : Class 5
d

Ans 2:

anu from Haralur, Bengaluru
Class : Class 5

Ans 3:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2
DDD

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
D

Ans 5:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 8
d is the right answer

Ans 6:

Aaryaman Pradhan from De paul School , Berhampur
Class : Class 5
d

Ans 7:

Krishiv Chandan Sukul from Seven 11 Scholastic School, Mumbai
Class : Class 7
YOU! An admin from Revisewise, you don't even own up to SOF's mistake.Da questions do not show properly and you think I'm responsible!

Ans 8: (Master Answer)

from ,
Class :

Ans 9:

anu from Haralur, Bengaluru
Class : Class 5

Ans 10:

Shiven Dinkar from DPS Noida, Delhi
Class : Class 4

Ans 11:

Saharsh Aggarwal from Redwood High International School, MUMBAI SUBUEBAN
Class : Class 6
B is the answer

Ans 12:

from ,
Class :

Ans 13:

Aayush Shere from City Pride School, Ravet, Pune
Class : Class 4
CAN SOMEONE EXPAIN?

Ans 14:

Rahul from Cambridge school, noida
Class : Class 4
Explain PleaseI need the explaination

Ans 15:

anu from Haralur, Bengaluru
Class : Class 5
what they've went and done is put exxxtra optionsss! Real irratating

Ans 16:

Gurnoor from Chitkara International School, Chandigarh
Class : Class 5
ans was b and i wrote b

Ans 17:

Saharsh Aggarwal from Redwood High International School, MUMBAI SUBUEBAN
Class : Class 6

Ans 18:

Divyanshi from The Heritage school, Kolkata
Class : Class 5
D is the right ansExplanation- LOW VITAMIN A - NIGHT BLINDNESSLOW V. B - BERI BERI

Ans 19:

Adway Bachchan from Indian School Sohar, Sohar
Class : Class 8

Post Your Answer

Sutirth Badu from Sherwood High, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Anika S Kumar from Alphabets International school , Chennai
Class : Class 7
B

Ans 2:

Aaditva from Vasant Valley School, New Delhi
Class : Class 6
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 3:

shivansh from apeejay school, noida
Class : Class 5
It's answer should be B option

Ans 4:

Kairav Gupta from Bombay Scottish School, Mahim, Mumbai
Class : Class 4
Answer has to be option B

Ans 5:

from ,
Class :

Ans 6:

Aaditva from Vasant Valley School, New Delhi
Class : Class 6
How a Vineet?

Ans 7:

BV Karthikeya from Sentia, Hyderabad
Class : Class 6

Ans 8:

Kairav Gupta from Bombay Scottish School, Mahim, Mumbai
Class : Class 4
The answer should be option C

Ans 9:

VAIBHAV DINESH from Christ Nagar HSS, TRIVANDRUM
Class : Class 4

Ans 10:

Ronav Kerkar from Jamnabai Narsee School, Mumbai
Class : Class 7

Ans 11:

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Class : Class 7

Ans 12:

Shamit Vashishth from Lucknow Public School, Lucknow
Class : Class 4
I think it is c.

Ans 13:

Ronav Kerkar from Jamnabai Narsee School, Mumbai
Class : Class 7
d

Ans 14:

from ,
Class :
ans b is the answer......

Ans 15:

Shrihan Koley from Kairali School, Ranchi
Class : Class 6
Seen you all later.

Ans 16:

k tagore from montessori school, KURNOOL
Class : Class 3

Ans 17:

Ajit kumar from Rps , Biharsharif
Class : Class 4

Ans 18:

Syon from Sentia The Global School, Hyderabad
Class : Class 8

Ans 19:

Ankush Dey from Sri Chaitanya Techno School Newtown, Kolkata
Class : Class 6
SOF Trainer Is Saying Option D But I Think It Is Option C

Ans 20:

Shrihan Koley from Kairali School, Ranchi
Class : Class 6
My head is not working and you all are crowding at a simple question! The answer of this question is always bbbbbbbbbbbbbbbbbbbbbb. Are you all are a small kindergarten kids? I think yes. You all are a kids . I think you all will in class 9 or 10. I am sure.

Ans 21:

vineet8026@gmail.com from dps, Doha
Class : Class 1
A

Ans 22:

Rahul from Cambridge school, noida
Class : Class 4
Olympiad trainer is saying wrong it would be B bcoz it is 18....

Ans 23:

Koyel Biswas from Adamas World School, Kolkata
Class : Class 5
option b

Post Your Answer

from ,
Subject :NSO    Class : Class 8

Ans 1:

from , Hajipur
Class : Class 8
a is answer

Ans 2:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Post Your Answer

from ,
Subject :NSO    Class : Class 8

Post Your Answer

Ashwin Shridhar from Vidyashilp Academy, Bangalore
Subject :NSO    Class : Class 7

Ans 1:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
would'nt the answer be c ?because kangaroo rats consume water in very limited wayand slow their metablic rate.

Ans 2:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
I think the answer should be c .

Ans 3:

Midhuna from ABCD, Banglore
Class : Class 3
I have one thing to say the answer is C

Ans 4:

Antareep Mukherjee from New Horizon Public School, Bangalore
Class : Class 8

Ans 5:

Admin fly from Ddssxxx, Ax
Class : Class 1
THE ANSWER SHOULD BE C !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 6:

Nandu from The Asian School, Bahrain
Class : Class 3
ANS MUST BE Opt C

Ans 7:

Midhuna from ABCD, Banglore
Class : Class 3
no, I changed my answer there is a misconception that camels drink less water.A camel's water intake varies according to his environment, his exertion level, and the amount of fat in his hump. A thirsty camel can drink more than 30 gallons of water in less than 15 minutes. 1.1 A typical camel can drink 200 liters (53 gallons) of water in three minutes. they drink a lot of water but can also go a long time without drinking water...hope it helps

Ans 8:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 9:

shweta garg from Apeejay School, Ghaziabad
Class : Class 7
c c c c c c c c c c c c c c c c c c c cc c c c c c c c c c c c c it should be c

Post Your Answer

Ashwin Shridhar from Vidyashilp Academy, Bangalore
Subject :NSO    Class : Class 7

Ans 1:

Venya Vikas from Chirec International , Hyderabad
Class : Class 7
It should be option A

Ans 2:

Admin fly from Ddssxxx, Ax
Class : Class 1

Ans 3:

from ,
Class :

Ans 4:

Admin fly from Ddssxxx, Ax
Class : Class 1
NA

Ans 5:

Surya from INDIAN SCHOOL JALAN OMAN, Alkamil oman
Class : Class 7
it is wrong because north east India receives less rainfall as rajasthan is in north east india

Post Your Answer