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Chemistry

Chemistry
Ethylene is a ________ molecule.

Nonpolar
Covalent
Polar
Ionic

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Chemistry
Detergents are

None of these
Sodium salts of sulphonic acids
Sodium salts of fatty acids
Sodium salt of benzoic acid

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Chemistry
Which of the following elements is not present in stainless steel?

Iron
Nickel
Tungsten
Chromium

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Chemistry
Total number of elements in the Periodic table

118
127
112
115

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Chemistry
The metal extracted from Bauxite is :

Aluminum
Manganese
Silver
Copper

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Chemistry
A pungent smell often present near the urinals is due to

Ammonia
Sulphur-di- oxide
Chlorine
Urea

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