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

Ans 1:

Kaashvi Sharma from Bal Bharati Public School, GRHM, New Delhi
Class : Class 6

Ans 2:

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

Ans 3:

Anantjit Chander from Apeejay School, Sector 14, Faridabad, Faridabad
Class : Class 5
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?

Ans 4:

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

Ans 5:

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 6:

Sankeerth Sunil from Shishya BELM public School, Bangalore
Class : Class 6

Ans 7:

Pratham Dave from GNS, Bangalore
Class : Class 6
I prefer option C.

Ans 8:

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

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

Ans 1:

Saanvi from rvk, bengaluru
Class : Class 8
tibia and fibula

Ans 2:

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

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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:

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 2:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
Yes the option C is the correct as groundwater is not always safe

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:

Shourya Mundra from Lotus Valley International School NOIDA, Ghaziabad
Class : Class 8
No ground water has impurities, minerals, gases and some microbes dissolved in it

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:

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 7:

Riya Gupta from Birla Divya Jyoti, Siliguri
Class : Class 7
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)!!!!!!!!!!!!

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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:

Bhogavalli from Timpany , Visakhapatnam
Class : Class 4
Its C

Ans 2:

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

Ans 3:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 6

Ans 4:

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

Ans 5:

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

Ans 6:

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 7:

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

Ans 1:

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

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Cyril Cyriac from Naipunnya Public School, Cochin
Subject :NSO    Class : Class 1

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Moukthika from Vibgyor, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

Shivaksh Saurav from Delhi Public School Bangalore-East, Bengaluru
Class : Class 4
its [C] tailor bird

Ans 2:

saisavit from sri kumaran ps, bangalore
Class : Class 3
B weaver birds

Ans 3:

Shaarvi Pant from Greenwood High, Bangalore
Class : Class 2
B Weaver Bird

Ans 4:

Shaarvi Pant from Greenwood High, Bangalore
Class : Class 2

Ans 5:

Jibran Noorshah from Christ Academy, Bengaluru
Class : Class 5
the answer is (B) weaver bird.

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

Ans 1:

Avantika Raj from Delhi Public School, Bengaluru
Class : Class 5

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Shashank Reddy from Gyan Ganga International School, Pune
Subject :NSO    Class : Class 4

Ans 1:

Mithul Pranav KB from Narayana Olympiad School Madipakkam, Chennai
Class : Class 5
ANSWER IS (a)

Ans 2:

Saarth Agrawal from Podar International School , Mumbai
Class : Class 5
Explaaaaaaaaaaaaaaaaaaaaaaiiiiiiiiiiiiiiiiiiiiiin

Ans 3:

Mithul Pranav KB from Narayana Olympiad School Madipakkam, Chennai
Class : Class 5

Ans 4:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4
PLEASE EXPLAIN

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