Why hard water does not give lather with soap ?
Hard water contains Ca and Mg ions which form precipitate with soap
Hard water contains sulphate and chloride ions which form precipitate
pH of hard water is high
pH of hard water is less
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