Microbial fuel cells are considered a source of sustainable energy. Why? They use living organisms as catalysts to generate electricity from certain substrates. They use a variety of inorganic materials as substrates. They can be installed in waste water treatment plants to cleanse water and produce electricity. Which of the statements given above is/are correct?
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
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