National Science Olympiad Forum By SOF Olympiad Trainer - Page 471

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 10

Ans 2:

Class : Class 6

Ans 3:

Class : Class 8
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?

Ans 4:

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 5:

Class : Class 6
Ans is C because Black Gold is another name for coal.

Ans 6:

Class : Class 1
Ans 6 is absolutely right. Ans is C.

Ans 7:

Class : Class 7
I prefer option C.

Ans 8:

Class : Class 8

Ans 9:

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

Ans 10:

Class : Class 5
c is the correct answer

Ans 11:

Class : Class 6
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.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
tibia and fibula

Ans 2:

Class : Class 8
Tibia and Fibula(option C.)

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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:

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 2:

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 3:

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 4:

Class : Class 7
tf

Ans 5:

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 6:

Class : Class 7
Ground water is not always safe, it can contain soluble impurities like arsenic

Ans 7:

Class : Class 9
No ground water has impurities, minerals, gases and some microbes dissolved in it

Ans 8:

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 9:

Class : Class 8
Yes the option C is the correct as groundwater is not always safe

Ans 10:

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.

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Option C

Ans 2:

Class : Class 5
i got noooooooo idea

Ans 3:

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 4:

Class : Class 7

Ans 5:

Class : Class 5

Ans 6:

Class : Class 7
I HAVE NOOOOOOOOOOOOOO IDEA !!!!!!!!

Ans 7:

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

Ans 8:

Class : Class 4
Its C

Ans 9:

Class : Class 4
Not C the answer is D

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Explosion

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
BB

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
the answer is (B) weaver bird.

Ans 4:

Class : Class 7
B weaver birds

Ans 5:

Class : Class 3

Ans 6:

Class : Class 3
B Weaver Bird

Ans 7:

Class : Class 7
its [C] tailor bird

Ans 8:

Class : Class 5
Answer is B - Weaver bird.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 8

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