Solutions

                                        Question Answer  1. Find the pH of 1x10 -5     H 2 SO 4 . > Given, normality of H 2 SO 4 , = 1x10.5 N Basicity of H2SO = 2 We know that, Molarity (M)=Normality(N)/ Basicity of acid                        =1 × 10 -5 /2                        =5 × 10 -6 M H 2 SO 4  ionizes   as H 2 SO 4       →                               2H +   + SO 4 1 M                        ...

                                   Answer Questions :-  1.  Why sound made at a distance can be heard distinctly at night than in the day time? >At night, the atmospheric air becomes moist than at day time. So, density of air at night is less than at day time. But the velocity of sound is inversely proportional to the square root of density i.e.,  V  ∞ 1/ . So, velocity of sound at night is more than at day time due to reduced density of air. Hence, sound made at a distance can be heard distinctly at night than in daytime. 2. Is velocity of sound more in damp air or in dry air? Explain. > In the wet day, the atmospheric air becomes moist than on a dry day. Pressure of moist air reduces its density. We know that the velocity of sound in air is inversely proportional to the square root of the density i.e. V ∞ 1/ ...

                                                            Answer questions                                                           1. Distinguish between decinormal and decimolar solution . > Following are the different between decinormal and decimolar solution: Decinormal solution Decimolar solution 1. The solution in which one tenth gram equivalent of solute is dissolved to prepare one litre solution. 1. The solution in which one tenth mole of solute is dissolved to prepare one litre solution 2. It is denoted by 2. It is d...