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

User Forum

Ask Your Question
Devang Bansal from St Kabir Public School, Chandigarh
Subject :NSO    Class : Class 9

Ans 1:

from , Nanded
Class : Class 10
C- It must remain constant through out.

Ans 2:

venkatt ramanaw from DePaul School ICSE Ukkunagaram, Visakhapatnam
Class : Class 9
C-It remains constant throughout.

Post Your Answer

Harshit Singh from Dehli Public School, Sector-102A, Gurgaon, Gurgaon
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

Ans 2:

Aryaveer And Shaurya Shinde from Goldcrest High Vashi, Navi Mumbai
Class : Class 5
Answer: AExplanation: Food is masticated with teeth and partially digested by the action salivary juices in the mouth (P).

Ans 3:

kalra Shaleen from Jalandhar, Jalandhar
Class : Class 4
The answer is A

Ans 4:

Anaahad Mehar Satsangi from Delhi Public School Agra, Agra
Class : Class 3
The answer is a

Post Your Answer

Ishaan Das Roy from Sri Chaitanya Techno School, Bengaluru
Subject :NSO    Class : Class 6

Post Your Answer

Gauri Chaturvedi from St. Joseph Convent, Jabalpur
Subject :NSO    Class : Class 6

Ans 1:

Ojas Patil from Vikhe Patil Memorial School Pune, Pune
Class : Class 7
c because of gravity 1 will fall. imbalance and so other will also fall

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 7
Both of them will fall because box II will come down due to gravity and box I will become heavier

Ans 3:

Arushi from Indira National School, Pune
Class : Class 8
Both blocks will fall because there will be nothing to hold them.It is like a sea-saw balanced in the middle.If one person gets up,the other will go down.

Post Your Answer

Dharini Manimaran from BVM Global @ Bollineni Hillside, Chennai
Subject :NSO    Class : Class 7

Kanav took two test tubes marked as I and II. In test tube I, he put calcium carbonate and hydrochloric acid while in test tube II, he put zinc granules and hydrochloric acid. He passed the gas coming out from both the test tubes in lime water. What would be his observation?


A The gas coming out from test tube I turned lime water milky.
B The gas coming out from test tube II turned lime water milky.
C The gases coming out from both the test tubes turned lime water milky.
D None of these.


it could have been simpler

Ans 1:

ARIJIT SINGH from SAT PAUL MITTAL SCHOOL , Ludhiana
Class : Class 7

Ans 2:

Dhruvan G from Indian School Al Ghubra, Muscat
Class : Class 8
If it could have been simpler, then you don't have to study for these Olympiads as its too difficult. And I don't think it is very difficult and the option is (A) i think.

Post Your Answer

prerak from cambridge court high school, jaipur
Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

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

Post Your Answer

Dhruvan G from Indian School Al Ghubra, Muscat
Subject :NSO    Class : Class 7

Ans 1:

Shriyam from Chinmaya vidyalaya Bokaro, Bokaro
Class : Class 7
Answer is B don't look for more information ans is hidden in question with less information also

Ans 2:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option b is the answer

Post Your Answer

Suvid Singhal from Salwan Public School, Gurgaon
Subject :NSO    Class : Class 7

Swati take X fabric and burn it. She observes following properties of the fabric :
(i) It burns but does not melt.
(ii) It shrinks from flame.
(iii) It gives the odour of charred meat while burning.
(iv) It left residue after burning which is black, hollow, irregular bead that can be easily crushed to a gritty black powder.
(v) It is self extinguishing.
According to her observation, X could be

A Silk
B Jute
C Cotton
D Nylon.


Ans 1:

Dhruvan G from Indian School Al Ghubra, Muscat
Class : Class 8
It HAS to be silk. Reference: https://www.dharmatrading.com/home/the-fire-test.html

Post Your Answer

Krish from BPDAV, Hyderabad
Subject :NSO    Class : Class 8

Consider the following statements and select the option which correctly identifies true (T) and false (F) ones.
(i) Growing different crops in different seasons in the same field will deplete the nutrients of soil.
(ii) Freshly harvested grains must be dried before sowing.
(iii) Manures are mineral specific as they provide all the minerals needed by plant.
(iv) Broadcasting of seeds is done by seed drill.

(i) (ii) (iii) (iv)
A T F F F
B F T F F
C T T F F
D F T F T


According to me answer show be C

Ans 1: (Master Answer)

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

Post Your Answer

ekta singhal from TSVS, Bhopal
Subject :NSO    Class : Class 4

Ans 1:

Abhay rajvanshi from Delhi Public School, Gurgaon
Class : Class 7
Hi bro, it is very easy if you understand it properly. It is just for testing your direction sense.

Post Your Answer