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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1023
6.023 × 1025
6.023 × 1024
6.023 × 1022

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Chemistry
Ozone depletion in the atmosphere is mainly caused by

Chlorofluorocarbon
Nitrogen dioxide
Sulphur dioxide
Hydrogen sulphide

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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

UV absorption spectroscopy
Rotational spectroscopy
UV photoelectron spectroscopy
Infrared absorption spectroscopy

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Chemistry
Global warming is mainly due to accumulation of

Carbon dioxide
Carbon monoxide
Oxides of sulphur
Oxides of nitrogen

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Chemistry
The element absorbed both in cation and anion form is

Calcium
Nitrogen
Sulphur
Phosphorus

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Chemistry
Which metal is extracted from sea water?

Potassium
Beryllium
Aluminium
Magnesium

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