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

User Forum

Ask Your Question
Mannat Verma from Vivek High School , Chandigarh
Subject :NSO    Class : Class 5

Ans 1:

Swastik from st marys school, new delhi
Class : Class 6
answer is B because Oil spill is the condition when mineral oil or petroleum oil being carried on a ship gets spilled in the sea due to some reason. This causes death of aquatic organisms. Oil gets coated on feathers of aquatic birds making them unable to fly and to regulate their body temperatures. This causes death of the birds.

Ans 2:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C because due to oil spill fishes die because it happens in water. Also, aquatic birds get covered with black coating because of that they can't breathe and they die.

Ans 3:

Swastik from st marys school, new delhi
Class : Class 6
sorry by mistake i have written B but the answer is C

Post Your Answer

from DPS North Kolkata, Kolkata
Subject :NSO    Class : Class 4

Post Your Answer

from DPS North Kolkata, Kolkata
Subject :NSO    Class : Class 4

Post Your Answer

Avantika Raj from Delhi Public School, Bengaluru
Subject :NSO    Class : Class 3

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 1
A

Post Your Answer

Mannat Verma from Vivek High School , Chandigarh
Subject :NSO    Class : Class 5

Ans 1:

Maanvik Srivastava from Cornerstone, Hyderabad
Class : Class 5
THE CORRECT ANSWER IS C, BECAUSE BLACK GOLD IS ANOTHER NAME FOR CRUDE OIL OR PETROLEUM .

Ans 2:

Me from bbps, New Delhi
Class : Class 5

Ans 3:

Ankita Dave from GNS, Bangalore
Class : Class 4
I prefer option C.

Ans 4:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C because Black Gold is another name for coal.

Post Your Answer

vrahulprakaash from Amm, Chennai
Subject :NSO    Class : Class 7

Ans 1:

saanvi from rvk, bengaluru
Class : Class 6
tibia and fibula

Ans 2:

Ashmita Choudhury from Delhi Public School Noida, Noida
Class : Class 8
Tibia and Fibula(option C.)

Post Your Answer

Animesh Jain from DPS, Bengaluru
Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1: Groundwater is safe for drinking.
Statement 2: Groundwater is free from soluble impurities.

ABoth statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
CStatement 1 is correct but statement 2 is incorrect.
DBoth statements 1 and 2 are incorrect.


Groundwater is free from soluble impurities is wrong. Ground water is free from suspended impurities but it contains dissolved gases, minerals and salts. Hence answer is C.

Ans 1:

Shourya Mundra from Lotus Valley International School NOIDA, Ghaziabad
Class : Class 7
No ground water has impurities, minerals, gases and some microbes dissolved in it

Ans 2:

RIYA GUPTA from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 6
Answer is option'D'. Neither of the statements are correct. And SOF World, Please listen to our comments and reply to it and rectify your mistakes quickly,ASAP. Iam not here to scold you, but trying to advise you. So please, from the heart of all the students who are commenting(including me), rectify all your mistakes ASAP( AS SOON AS POSSIBLE)!!!!!!!!!!!!

Ans 3:

Sagnik Chatterjee from Delhi Public School, Greater Noida
Class : Class 7
Ground water is not always safe, it can contain soluble impurities like arsenic

Ans 4:

DHANANJAY from HOLY GRACE, Mala
Class : Class 6
groundwater sometimes have heavy metals such as lead and arsenic dissolved in them and hence is always not safe for drinking

Ans 5:

devansh gaurangi from Stella Maris School , Lucknow
Class : Class 6
Some dissolved salts in water is essential for human body and groundwater is free from suspended impurities but it contains soluble things, hence the option is C.

Ans 6:

Harry Potter from Hotel California, California
Class : Class 4
Yes the option C is the correct as groundwater is not always safe

Post Your Answer

swagatika from giis, BENGALURU
Subject :NSO    Class : Class 2

Post Your Answer

Mannat Verma from Vivek High School , Chandigarh
Subject :NSO    Class : Class 5

Ans 1:

Adithi Keshava from National Center For Excellence , Bangalore
Class : Class 6
Option C

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5

Ans 3:

Sunita from Dps, Greater Noida
Class : Class 6
Sunita from Dps, Greater NoidaClass : >Class 5 about a minute agoAdithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption CAns 2:Adithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption C

Ans 4:

Sunita from Dps, Greater Noida
Class : Class 6
Adithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption C

Post Your Answer

from Dav public school brs nagaR ludhiana, LUDHIANA
Subject :NSO    Class : Class 5

Ans 1:

Adithi Keshava from National Center For Excellence , Bangalore
Class : Class 6
Explosion

Post Your Answer