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Chemistry

Chemistry
Which one of the following metals does not react with water to produce Hydrogen ?

Cadmium
Potassium
Sodium
Lithium

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Chemistry
Bayer's reagent is

Acidified potassium permanganate
Bromine water
Hydrogen peroxide
Alkaline potassium permanganate

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Chemistry
Emulsifier is an agent which

Homogenizes the emulsion
Stabilizes an emulsion
Accelerates the dispersion
Aids the flocculation of emulsion

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Chemistry
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

1/3
1/8
1/6
1/4

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Chemistry
The most abundant inert gas in the atmosphere is

Helium
Krypton
Argon
Neon

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Chemistry
The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ?

Zero
6
12
18

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