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Chemistry

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

Sulphur-di- oxide
Ammonia
Urea
Chlorine

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Chemistry
Which of the following is not a greenhouse gas ?

Chlorofluorocarbon
Hydrogen
Nitric oxide
Carbon dioxide

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

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

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Chemistry
Suspension particles have the size between

10–1 – 10–2 cm
10–2 – 10–4 cm
10–5 – 10–7cm
10–8 – 10–10cm

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Chemistry
Which of the following is not a precious/semi-precious stone?

Emerald
Pearl
Sapphire
Ruby

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Chemistry
Supersonic jet causes pollution by thinning of

CO2 layer
O3 layer
O 2 layer
SO2 layer

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MORE MCQ ON Chemistry

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