The freezing point of a solution of 2.40 g of biphenyl(`C_(12)H_(10)`) in 75.0 g of benzene (`C_(6)H_(6)`) is `4.40^(@)C`. The normal freezing point of benzene is `5.50^(@)C`. What is the molal freezing point constant `(^(@)C//m)` for benzene ?

The freezing point of a solution containing 0.1g of K_3[Fe(CN)_6] in 100 g of water. (K_f=1.86 K kg mol^-1) is

A solution of 0.640 g of azulene in 100.0 g of benzene is 80.23^(@)C . The boilingpoint of benzeneis 80.10^(@)C , and K_(b) is 2.53^(@)C /molal What is the moleculer mass of azulene? a) 108 b) 99 c) 125 d) 134

The freezing point of a solution containing 0.3 g of acetic acid in 30.0 g of benzene is lowered by 0.45^@ . Calculate the Van's Hoff factor. (K_f for benzene=5.12K kg mol^-1) .

The freezing point of solution containing 0.2 g of acetic acid in 20.0 g of benzene is lowered by 0.45^(@)C . Calculate the degree of association of acetic acid in benzene. (K_(f)=5.12 K^(@) mol^(-1) kg^(-1))

5 . 0 g of phenol dissolved in 250 g of benzene shows a depression in freezing point equal to 0 . 70^(@) C. What is the percentage association of phenol ? ( K_(f) for benzene = 5.12 K kg. MOL^(-1) )

The boiling point of a solution containing 1.5 g of a dichlorobenzene in 100 g of benzene was higher by 0.268^@C . Calculate the molar mass of dichlorobenzene (K_b for benzene=2.62 degree molal^(-1)) .

2.1 g of non-electrolyte solute (molar mass 250 g/mol) was dissolved in 5.12 g of benzene. If the freezing point of depression constant, k_f of benzene is 5.12 K kg/mol, Calculate the freezing point of benzene.

On dissolving 0.25 g of a non-volatile substance in 30 mL of benzene (density 0.8 g "mol"^(-1) ) its freezing point decreases by 0.40^(@)C . Calculate the molecular mass of the non-volatile substance. ( K_(f) for benzene is 5.12 k m^(-1) )

Two elements A and B form compounds having formula AB2 and AB4. When dissolved in 20 g of benzene (C_6H_6), 1 g of AB_2 lowers the freezing point by 2.3 K whereas 1.0 g of AB_4 lowers it by 1.3 K. The molar depression constant for benzene is 5.1 K kg mol^(-1) . Calculate atomic masses of A and B.