Write the IUPAC name of the following compound :

(a) A 10% solution (by mass) of sucrose in water has a freezing point of 269.15K. Calculate the freezing point of 10% glucose in water if the freezing point of pure water is 273.15 K.

Given :

(Molar mass of sucrose = 342 g mol^–1)

(Molar mass of glucose = 180 g mol^–1)

(b) Define the following terms :

(i) Molality (m)

(ii) Abnormal molar mass

OR

(a) 30 g of urea (M = 60g mol^–1) is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23.8 mm Hg.

(b) Write two differences between ideal solutions and non-ideal solutions.

(a) Write the product(s) in the following reactions :

(i)

(ii)

(iii)

(b) Give simple chemical tests to distinguish between the following pairs of compounds :

(i) Butanal and Butan-2-one

(ii) Benzoic acid and Phenol

OR

(a) Write the reactions involved in the following :

(i) Etard reaction

(ii) Stephen reduction

(b) How will you convert the following in not more than two steps :

(i) Benzoic acid to Benzaldehyde

(ii) Acetophenone to Benzoic acid

(iii) Ethanoic acid to 2-Hydroxyethanoic acid

Using IUPAC norms write the formulae for the following:

(a) Tris (ethane-1,2-diamine) chromium (III) chloride

(b) Potassium tetrahydroxozincate (II)

(a) Write the principle of vapor phase refining.

(b) Write the role of dilute NaCN in the extraction of silver.

(c) What is the role of collectors in the froth floatation process? Give an example of a collector.