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Chemistry

Chemistry
Percentage of lead in lead pencils is

40
80
31-66

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Chemistry
Which one of the following is used as an anti-freeze for the automobile engines ?

Methanol
Propyl alcohol
Ethanol
Ethylene glycol

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Chemistry
Choose the incorrect statement pertaining to organic compounds

They are not easily combustible
They do not dissolve in water
They have low melting and boiling points
They contain mainly carbon and hydrogen

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Chemistry
Which of the following is not present in German-silver?

Silver
Copper
Nickel
Zinc

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Chemistry
Cement is usually a mixture of :

Calcium silicate and calcium aluminate
Calcium silicate and calcium ferrate
Lime stone and silicon dioxide
Calcium aluminate and calcium ferrate

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Chemistry
The most abundant element in the earth’s atmosphere is

Argon
Krypton
Nitrogen
Oxygen

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MORE MCQ ON Chemistry

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