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Chemistry

Chemistry
The acid rain destroys vegetations because it contains

Carbon monoxide
Sulphuric acid
Nitric acid
Ozone

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Chemistry
When ice cubes are made, the entropy of water

Decreases
May either increase or decrease depending on the process used
Increases
Does not change

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Chemistry
Persons working in cement plants and lime stone quarries are prone to disease like

Asthma
Silicosis
Pneumoconiosis
Cancer

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Chemistry
Air is said to be saturated when :

Its pressure is minimum
Its thickness is maximum
It contains maximum content of water vapour
It blows over the barren land

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Chemistry
Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water

Calcium
Magnesium
None of these
Manganese

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Chemistry
The depletion of Ozone layer is mainly due to

Chlorofluorocarbons
Radioactive rays
Volcanic eruptions
Aviation fuels

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