Which one of the following statements is not correct?
Water starts boiling when its vapour pressure becomes equal to atmospheric pressure
Water is known as universal solvent
Permanent hardness of water is due to presence of MgCl₂, CaCl₂, MgSO₄ and CaSO₄
Density of ice is greater than that of 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