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

User Forum

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

Ans 1:

Shreya Mahesh from Sri Sri Ravishankar Vidya Mandir, Bangalore
Class : Class 8
Option A

Post Your Answer

ATUL SANJEEV from Indian school Ghubra, Muscat
Subject :NSO    Class : Class 5

Ans 1:

Alay Shah from Euro School, Thane
Class : Class 5
Explanation in the solution is not matching any options. According to explanation option one and three are correct.

Post Your Answer

yana from VIDYA VIKASINI HIGH SCHOOL, VASAI
Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

atharv from bluebells international, delhi
Class : Class 4

Ans 3:

Student from School, City
Class : Class 8

Ans 4:

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

Ans 5:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 6
It's chalk powder

Ans 6:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
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 7:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 6
The correct answer is C . It will be coffee power.

Ans 8:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 4

Ans 9:

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

Ans 10:

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

Ans 11:

Saarang roy from Indian school ghubra, Muscat
Class : Class 5
The correct answer is d chalk powder because it is insoluble in water while the rest are not.

Ans 12:

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

Ans 13:

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

Ans 14:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
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 15:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 5
salt for the way

Ans 16:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 6
It's chalk powder

Ans 17:

Anika from Alphabets, Chennai
Class : Class 5
Coffee powder

Ans 18:

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

Post Your Answer

atharv from bluebells international, delhi
Subject :NSO    Class : Class 4

Ans 1:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
How 5? answer is 4The shapes are:circle,triangle,rectangle and square

Ans 2:

MIERA SHARMA from DPS AGRA, AGRA
Class : Class 4
IT SHOULD BE 5 AS THERE IS SQUARE TRIANGLE SEMECIRCLE RECTANGLE AND DIAMOND

Ans 3:

Aaditya Kant from DPS, Nerul, Navi Mumbai
Class : Class 4
its d

Ans 4:

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

Ans 5:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
The answer is D) 4

Ans 6:

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

Ans 7:

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

Ans 8:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai
Class : Class 4
semicircle is there but made by square so the answer is 4

Ans 9:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 6
Can you tell the answer of this question

Ans 10:

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

Ans 11:

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

Ans 12:

Avya Pandey from NPS International, Singapore
Class : Class 2
b as there is a semi-circle

Ans 13:

Sahanaa from Sancta Maria International School, Hyderabad
Class : Class 4
How are we supposed to know it’s a rectangle when hidden by the circle ,bonne nuit

Ans 14:

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

Ans 15:

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

Ans 16:

mayukh chatterjee from somerville school, noida
Class : Class 4
why semicircle not be counted

Ans 17:

PARTH PANCHAL from NEW HORIZON SCHOLARS SCHOOL, THANE
Class : Class 5
the answer can even be 'B' as semi-circle is there ,made by square

Ans 18:

Atharva Batra from Modern Delhi Public School, Faridabad
Class : Class 4
5

Post Your Answer

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

Ans 1:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 2:

bipasana from KV IIT Kanpur, Kanpur
Class : Class 8
The answer is A.

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

vedant from st john senior secondry school, greater noida west
Class : Class 7
Answer is d

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Post Your Answer

Ajoy Bhuyan from Delhi public school, Bongaigaon
Subject :NSO    Class : Class 4

Ans 1:

Bushra aslam from uttam, Ghaziabad
Class : Class 5
DDD

Ans 2:

ANAY GUPTA from CMS KANPUR ROAD LUCKNOW, LUCKNOW
Class : Class 5
d is the right answer

Ans 3:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Ans 4:

Arnav Vashisth from GD GOENKA PUBLIC SCHOOL, Delhi
Class : Class 5
What is night blindness😷😷?? Scurry😭😭😭

Ans 5:

Adway Bachchan from Indian School Sohar, Sohar
Class : Class 5

Ans 6:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d is the answer

Ans 7:

Soorya Tej R from Delhi Public School, Hyderabad
Class : Class 4
ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Ans 8:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 8
D

Ans 9:

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

Ans 10:

Shiven Dinkar from DPS Noida, Delhi
Class : Class 4

Ans 11:

Ajoy Bhuyan from Delhi public school, Bongaigaon
Class : Class 4

Ans 12:

Samarth Vijay Yeliathaya from Shri Kumarans Children home,cbse, Bangalore
Class : Class 4
d

Post Your Answer

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

Ans 1:

BV Karthikeya from Sentia, Hyderabad
Class : Class 6

Ans 2:

Anika from Alphabets, Chennai
Class : Class 5
B

Ans 3:

Ayushi from DPS Noida, Noida
Class : Class 4
ans b is the answer......

Ans 4:

AADRITA BISWAS from Adamas World School, Kolkata
Class : Class 2
option b

Ans 5:

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

Ans 6:

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

Ans 7:

PRADYUMNA OMPRAKASH GONDULE from DPS BHILAI, Bhilai
Class : Class 8

Ans 8:

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

Ans 9:

Syon from Sentia The Global School, Hyderabad
Class : Class 7

Ans 10:

Aaditva from DPS, New Delhi
Class : Class 5
How a Vineet?

Ans 11:

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

Ans 12:

Ronav Kerkar from Arya Vidya mandir, Mumbai
Class : Class 5
d

Ans 13:

Aaditva from DPS, New Delhi
Class : Class 5
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 14:

Ronav Kerkar from Arya Vidya mandir, Mumbai
Class : Class 5

Ans 15:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4

Ans 16:

jayasree from montessori school, KURNOOL
Class : Class 3

Ans 17:

Ankush Dey from Sri Chaitanya Techno School Newtown, Kolkata
Class : Class 5
SOF Trainer Is Saying Option D But I Think It Is Option C

Ans 18:

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

Post Your Answer

Dibyanshu Lahiri from Mont Fort Sr Sec School, Roorkee
Subject :NSO    Class : Class 8

Ans 1:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD
Class : Class 8

Ans 2:

from , Hajipur
Class : Class 8
a is answer

Post Your Answer

Dibyanshu Lahiri from Mont Fort Sr Sec School, Roorkee
Subject :NSO    Class : Class 8

Select the incorrect statements among the following:
(i) Bitumen is used for metalling the roads.
(ii) Some inexhaustible natural resources like coal, petroleum and natural gas formed from the dead remains of living organisms are known as fossil fuels.
(iii) Many useful substances are obtained from coal (commercial importance), so it is also called as ‘Black gold’.
(iv) Natural gas is used as a starting material for the manufacture of a number of chemicals and fertilisers.

A (i) and (ii) only
B (ii) and (iii) only
C (ii) and (iv) only
D (i), (ii) and (iv) only


Post Your Answer