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Chemistry

Chemistry
Supersonic jet causes pollution by thinning of

O3 layer
SO2 layer
CO2 layer
O 2 layer

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

Ammonia
Chlorine
Sulphur-di- oxide
Urea

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Chemistry
The metals commonly used for electroplating are

Gold, Sodium and Chromium
Gold, Sodium and Potassium
Chromium, Copper and Nickel
Nickel, Lead and Chromium

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Chemistry
What is the atomic number of mercury

80
41
63
32

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Chemistry
The two metal ions that cause hardness to water are:

Sodium, Potassium
Sodium, Calcium
Calcium, Magnesium
Sodium, Magnesium

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Chemistry
The 'solid waste' is also known as

Toxic waste
Sludge
Sedge
Scrubber

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MORE MCQ ON Chemistry

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