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Chemistry

Chemistry
Which among the following is found in chlorophyll ?

Fe2+
A l3+
Mg2+
Ca2+

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Chemistry
Which of the following is a metallic ore ?

Feldspar
Galena
Mica
Quartz

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Chemistry
Gobar gas mainly contains

Hydrogen sulphide
Carbon dioxide
Methane
Carbon monoxide

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Chemistry
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

Butane
Ethane
Propane
Methane

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Chemistry
The advantage of detergents over soaps is

Detergents are soluble in water
Soaps give lather with only soft water
Detergents could not give much lather
Detergents give lather even with hard water

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Chemistry
Which one of the following metals pollutes the air of a city having large number of automobiles?

Copper
Chromium
Lead
Cadmium

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