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

Ans 1:

Tanmay kaushal from ICSE, Mumbai
Class : Class 5

Ans 2:

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 3:

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

Ans 4:

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 5:

Pratham Dave from GNS, Bangalore
Class : Class 7
C , oil spill

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

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

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

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 6
A

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

Ans 1:

Biju Pappachan from Rkc , Raipur
Class : Class 1
Ans 6 is absolutely right. Ans is C.

Ans 2:

Ybbn from Alphabet International School, Chennai
Class : Class 4
How is this the answer ?

Ans 3:

Karthik Reddy Munnangi from Chirec International School, Hyderabad
Class : Class 9
I think it should be A as it says that option C is Black Gold is another name for granite, but Black Gold is another name for petroleum.

Ans 4:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?

Ans 5:

sarah pranav gothivarekar from Indian School Al Gubra, Muscat
Class : Class 4
black gold is another name for petroleum or crude oil but according to SOF it is granite I think there is some error in this question from SOF

Ans 6:

Siddhant Singhania from The Assembly of God Church School, Purulia, Purulia
Class : Class 8

Ans 7:

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

Ans 8:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10

Ans 9:

Kaashvi Sharma from Bal Bharati Public School, GRHM, New Delhi
Class : Class 8

Ans 10:

Sanskriti Nagar from Rose Bud Academy, khagaria
Class : Class 5
c is the correct answer

Ans 11:

Pratham Dave from GNS, Bangalore
Class : Class 7
I prefer option C.

Ans 12:

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

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from ,
Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

Saanvi from rvk, bengaluru
Class : Class 9
tibia and fibula

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

Ans 1:

malhar thorve from city internqtional school, satara road, pune
Class : Class 7

Ans 2:

Devdarsh hero 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 3:

from ,
Class :
Ground water is not always safe, it can contain soluble impurities like arsenic

Ans 4:

Naitik Mundra from International School Rheintal, Buchs Sankt Gallen
Class : Class 9
No ground water has impurities, minerals, gases and some microbes dissolved in it

Ans 5:

rethish from Veltech, Avadi
Class : Class 3
Let’s check whether the given statements are correct or incorrect:Statement 1: Groundwater is safe for drinking. ----- Correct.Statement 2: Groundwater is free from soluble impurities. ----- Correct.Groundwater is water that accumulates underground. Groundwater is safe for drinking because it is naturally filtered through layers of rocks and soil. So it is free from soluble impurities. That means Statement 1 is correct, and Statement 2 is the correct explanation of Statement 1.Hence, the right answer is Option A.

Ans 6:

rethish from Veltech, Avadi
Class : Class 3
Let’s check whether the given statements are correct or incorrect:Statement 1: Groundwater is safe for drinking. ----- Correct.Statement 2: Groundwater is free from soluble impurities. ----- Correct.Groundwater is water that accumulates underground. Groundwater is safe for drinking, because it is naturally filtered through layers of rocks and soil. So it is free from soluble impurities. That means Statement 1 is correct, and Statement 2 is the correct explanation of Statement 1.Hence, the right answer is Option A.

Ans 7:

devansh gaurangi from Stella Maris School , Lucknow
Class : Class 8
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 8:

Riya Gupta from Birla Divya Jyoti, Siliguri
Class : Class 8
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 9:

Udit Kankar from Advanced Academy, Indore
Class : Class 6
Groundwater is safe for drinking but is not free of soluble impurities and that is why we boil it, so the correct option is (C)

Ans 10:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
tf

Ans 11:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Yes the option C is the correct as groundwater is not always safe

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

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

Ans 1:

Sunita from Dps, Greater Noida
Class : Class 9
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 2:

Bhogavalli from Timpany , Visakhapatnam
Class : Class 4
Its C

Ans 3:

Sunita from Dps, Greater Noida
Class : Class 9
Adithi Keshava from National Center For Excellence , BangaloreClass : >Class 5 13 days agoOption C

Ans 4:

Dvij Agrawal from Lotus Valley International School, Gurgaon
Class : Class 5
i got noooooooo idea

Ans 5:

Adithi Keshava from National Center For Excellence , Bangalore
Class : Class 7
Option C

Ans 6:

Dripto Chakraborty from Greenwood High Sajarpur, Bangalore
Class : Class 5
Not C the answer is D

Ans 7:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 8:

Tanmay Chaudhary from MIET public school, MEERUT
Class : Class 7
I HAVE NOOOOOOOOOOOOOO IDEA !!!!!!!!

Ans 9:

kendre vaishnavi mangesh from podar international school , latur
Class : Class 5

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

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