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Subject :NSO    Class : Class 3

Nidhi was asked to draw the shadow of a tumbler formed on the screen
behind it, when it is kept in different manners at the same position and light is shone on it from the same direction. She drew three shadows as shown here.


Read the following statements regarding it and select the INCORRECT ones.
(i) Shadow 1 is formed when the tumbler is kept horizontally.
(ii) Shadow 2 is formed when the tumbler is kept vertically upright.
(iii) Shadow 3 is incorrect because the given tumbler cannot cast a rectangular shadow.

A (i) and (ii) only
B (ii) and (iii) only
C (i) and (iii) only
D None of these


Ans 1:

Class : Class 4
d

Ans 2:

Class : Class 4

Ans 3:

Class : Class 3
A

Ans 4:

Class : Class 3
the third one is wrong

Ans 5:

Class : Class 3
A

Ans 6:

Class : Class 5

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
But no force is acting on the book

Ans 2:

Class : Class 5
The answer is (B) as the book is under gravitational force that's why the book is on the table.

Ans 3:

Class : Class 3
B

Ans 4:

Class : Class 4
b is answer

Ans 5:

Class : Class 5
(B)

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Subject :NSO    Class : Class 5

Ans 1:

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:

Class : Class 6
sorry by mistake i have written B but the answer is C

Ans 3:

Class : Class 6
C , oil spill

Ans 4:

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:

Class : Class 5

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 1
A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
c is the correct answer

Ans 3:

Class : Class 6

Ans 4:

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

Ans 5:

Class : Class 6
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?

Ans 6:

Class : Class 6
I prefer option C.

Ans 7:

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

Ans 8:

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

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Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

Class : Class 8
tibia and fibula

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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 8
No ground water has impurities, minerals, gases and some microbes dissolved in it

Ans 2:

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:

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

Ans 7:

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

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Subject :NSO    Class : Class 2

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