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Potassium carbonate
Potassium chloride
Sodium bicarbonate
Potassium hydroxide
Ornithophily refers to the pollination through which among the following?
Oxide of sulphur present in the atmosphere are washed down by rains to cause :
Oxygen has (+) oxidation number only in
Oxygen was independently discovered by
Ozone depletion in the atmosphere is mainly caused by
Ozone layer of atmosphere absorbs:
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of
Passing a battery current through a solution of brine will produce
Permanent - hardness of water may be removed by addition of
Permanent hardness of water is due to the presence of ?