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Chemistry

Chemistry
The main source of Naphthalene is

Coal-tar
Diesel
Charcoal
Camphor

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Chemistry
Oxygen which is vital for life is a product of photosynthesis and comes from

Water
Carbonates from soil
Carbon dioxide
Oxides of mineral elements

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Chemistry
The wire of flash bulb is made of:

Magnesium
Silver
Copper
Barium

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Chemistry
Which of the following is used to remove ink and rust stains on cloth?

Oxalic acid
Alcohol
Ether
Kerosene oil

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Chemistry
Bayer's reagent is

Alkaline potassium permanganate
Acidified potassium permanganate
Bromine water
Hydrogen peroxide

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Chemistry
Which among the following is a covalent compound ?

Sodium chloride
Calcium chloride
Carbon tetrachloride
Magnesium fluoride

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