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Subject :NSO    Class : Class 5

Which of the following statements is incorrect?

A Precious metals like gold and platinum are used for making jewellery.
B Dentists use powdered pumice for polishing our teeth.
C Black gold is another name of granite.
D Shale is used to make tiles and bricks.


Ans 1:

Class : Class 10

Ans 2:

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

Ans 3:

Class : Class 6

Ans 4:

Class : Class 7
I prefer option C.

Ans 5:

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:

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

Ans 7:

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.

Ans 8:

Class : Class 5
c is the correct answer

Ans 9:

Class : Class 8

Ans 10:

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

Ans 11:

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

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