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Chemistry

Chemistry
Tear gas used by the police to disperse the mob contains

Carbon dioxide
Ammonia
Hydrogen sulphide
Chlorine

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Chemistry
Threshold limit value of copper in the atmospheric air is

0.001 mg/m3
0.01 mg/m3
5.0 mg/m3
1.0 mg/m3

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Chemistry
Suspension particles have the size between

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

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Chemistry
Which of the following is the major constituent of LPG?

Butane
Ethane
Methane
Propane

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Chemistry
Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called

Aerosols
Mists
Smoke
Fumes

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Chemistry
Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition

Rotational spectroscopy
Infrared absorption spectroscopy
UV absorption spectroscopy
UV photoelectron spectroscopy

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