Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent :
reduces drastically the surface tension between water and oil
increases the surface tension between water and oil
increases the viscosity of water and oil
decreases the viscosity in detergent mixed water
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