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:
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Ans 3:
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Ans 6:
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Class : Class 8
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 7:
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Ans 8:
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Class : Class 5
THE CORRECT ANSWER IS C, BECAUSE BLACK GOLD IS ANOTHER NAME FOR CRUDE OIL OR PETROLEUM .
Ans 9:
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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 10:
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Ans 11:
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Class : Class 10
In my case, I feel that (A)is a suitable answer. But the correct option is (C). Why?