Solutions Test ...

Which of the following is the only incorrect informarion regarding the composition of the system at 0.51 bar pressure ?

If the vapour are compressed slowly and isothermally , at what pressure , the first drop of liquid will appear ?

One having high vapour pressure at temperature below its melting point is?

$$2.0\ g$$ mixture of sodium carbonate and sodium bicarbonate on heating to constant weight gave $$224\ mL$$ of $$CO_{2}$$ at N.T.P.
The $$\%$$ weight of sodium bicarbonate in the mixture is:

The compound $$Na_2 CO_3 . x H_2O$$ has $$50  \%  H_2O$$ by mass. The value of "x" is :

The vapour pressure of pure liquid A at $$ 27^0 C $$ is

If the experimenty is performed aqueous $$ AlCl_3 $$ solution (a= 0.8 ) prepared by dissolving 1 mole of $$ AlCl_3 $$ in 17 mole of water and the decrease in the mass of solution in the experiment is found to be 0.18 g then the increase in the mass of absorbent should be

At $$80^o C$$, the vapour pressure of pure liquid A is 520 mm Hg and that of pure liquid B is 1000 mm Hg. If a mixture solution of A and B boils at $$80^o C$$and 1 atm pressure, the amount of A in the mixture is :

Sugar in urine sample can be detected by:

$$50 mL$$ of solution of $$ Na_2CO_3 $$ neutralizes $$49.35 mL$$ of $$4 N \ HCl$$ . the reaction is represented as 
$$ CO^{2-}_3 +2H^+ \rightarrow CO_2 +H_2O $$
The density of this $$ Na_2CO_3 $$ solution is 1.25 g $$ mL^{-1} ,$$ the percentage of $$  Na_2CO_3$$ in it is :