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Chemistry

Chemistry
1 carat of diamond is equal to

100 g
200 mg
200 g
100 mg

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Chemistry
Cloud is a colloidal dispersion of

Fog in a dispersion medium of water
Water drops in a dispersion medium of air
Air in a dispersion medium of water
Mist in a dispersion medium of air

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Chemistry
In the electroplating of gold, the electrolyte used is

Gold sulphate
Potassium aurocyanide
Gold chloride
Gold nitrate

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

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

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Chemistry
Which one of the following is an example of a gel ?

Milk
Shaving cream
Face cream
Cheese

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 5
–3 to + 6
–3 to + 3
–3 to + 4

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