Chemistry
Which of the following chemical materials is responsible for the depletion of ozone layer in the atmosphere ?

Carbon dioxide
Chlorofluorocarbon
Nitrous oxide
Sulphur dioxide

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Water cycle refers to

An integrated attempt to recycle water in relatively arid regions
Constant movement of water from ocean to land and back to ocean once again
Water distribution in relatively dry areas
Scientific management of water in areas excessively plagued with water-logging

ANSWER DOWNLOAD EXAMIANS APP