dhoran 9 vigyan ekam kasoti paper solution January 2022 | Std 9 Science Ekam Kasoti Solution 2022

A solution of pH = 9 is one thousand times as basic as a solution of pH.

One litre of a solution contains 18 .9 g of HNO_(3) and one litre of another solution contains 3.2 g of NaOH. In what volume ratio must these solution be mixed to obtain a neutral solution?

Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9 . The boiling point of this solution is

A solution is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9. What is the molality (m) of the solution. b. Water is added to the above solution such that the mole fraction of water in the solution becomes 0.9. What is the molality (m) of the solution?

Molality of an aqueous solution having 0.9 mole fraction of solvent is