The Normality of 4.9% (w/w) H2SO4 solution having density .02 gm/ml is ?

Ans key: (1.02 N )

Calculate the normality of HCl solution whose 500 ml is utillised to neutralise the 1500 ml of N/10 NaOH solution.

And : (3/10)

Henry`s law is not applicable for the aqueous solution of.......

(A) O2 

(B) N2

(C) SO3

(D) He

Answer (C) 

Explanation: Henry`s law is not applicable for the aqueous solution of those gas which undergoes  chemical reactions with solvent (water).

Here SO3 react with water to form sulphuric acid.

Henry`s law constant of CO2 in water at 298K is 5/3 k bar. If pressure of CO2 is 0.01 bar, then find its mole fraction.

An air bubble starts rising from the bottom of lake, it diameter is 3.6 mm at bottom and 4 mm at the surface. The depth of lake is 250 cm and temperature at surface is 40℃ . What is the temperature at the bottom of lake? (Given atmospheric pressure = 76 cm of Hg and g= 980 cm sec-1 neglect surface tension effect).