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Chemistry

Chemistry
Which of the following has pH value 7?

Sodium Carbonate
HCl
H2SO4
Pure Water

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Chemistry
The chemical formula of the laughing gas is

NO
NO2
N2O
N2O3

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Chemistry
The gas that usually causes explosions in coal mines is

Methane
Air
Carbon monoxide
Hydrogen

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

Ethane
Butane
Propane
Methane

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Chemistry
Charcoal is used in water treatment as a/an

Coagulant
Adsorbent
Absorbent
Solvent

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Chemistry
When a spoon is to be electroplated with nickel the spoon is

Made anode and a pure nickel rod, the cathode
Coated with nickel sulphate and dried
Made cathode and a pure nickel red, the anode
Dipped in a nickel sulphate solution

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