Chemistry
Burning pyrites ore gives out

Nitrogen dioxide gas
Sulphur dioxide gas
Carbon dioxide gas
Nitric oxide gas

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Water cycle refers to

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

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Aqua regia is a 1 : 3 mixture, by volume, of

Conc. hydrochloric acid and conc. nitric acid
Conc. sulphuric acid and conc. nitric acid
Conc. nitric acid and conc. hydrochloric acid
Conc. nitric acid and conc. sulphuric acid

ANSWER DOWNLOAD EXAMIANS APP