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Chemistry

Chemistry
Pollutant from motor car exhaust that causes mental disease is

NO2
Hg
SO2
Lead

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Chemistry
Polythene is polymer of

Ethylene
Acetylene
Aniline
Propylene

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

O2- > F- > Na+ > N3-
N3- > O2- > F- > Na+
Na+ > O2- > N3- > F-
N3- > Na+ > O2- > F-

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Electroplating
Hot dipping
Tinning
Galvanising

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Chemistry
A polymeric substance used to make parachute is

Terylene
Cotton
Viscose
Rayon

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Chemistry
Which of the following substance's smell is similar to Ethanoic acid?

Tomato juice
Kerosene
Lemon
Vinegar

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