Biological Oxygen Demand (BOD) is a standard criterion for
Measuring oxygen levels in blood
Computing oxygen levels in forest ecosystems
Pollution assay in aquatic ecosystems
Assessing oxygen levels in high altitude regions
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