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General Science MCQs

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Question 10medium

Washing soda is the common name for

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Question 11medium

Quartz crystals normally used in quartz clocks etc. is chemically

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Question 12medium

Which of the gas is not known as green house gas?

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Question 13medium

Bromine is a

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Question 14easy

The hardest substance available on earth is

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Question 15medium

The variety of coal in which the deposit contains recognizable traces of the original plant material is

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Question 16easy

Tetraethyl lead is used as

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Question 17hard

Which of the following is used as a lubricant?

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Question 18medium

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

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