The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons
Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons
Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons
Increased temperature at polar region due to global warming
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy