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Chemistry

Chemistry
Which one element from below list is liquid at room temperature

Argon
Bromine
Lead
Zinc

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Chemistry
Soap is prepared by boiling caustic soda with

Glycerine
Kerosene oil
Alcohol
Fats

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Chemistry
Copper substances when exposed to air gains a green coating due to the formation of:

CuSO4
Cu(NO3)2
CuCO3 Cu(OH)2
CuO

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Chemistry
Piped Natural Gas (PNG) is used for

Cooking
Anaesthesia
Welding
Mining

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Chemistry
Percentage of lead in lead pencils is

80
40
31-66

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Chemistry
Ultraviolet rays can be used in water treatment as

Hydrolyser
Disinfectant
Flocculator
Precipitator

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MORE MCQ ON Chemistry

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