(a) (i) State the important points put forward in Dalton’s atomic theory.
     (ii) How does the theory explain the law of multiple proportion?

 

(b) (i) Name three commercially useful products that may be obtained by chemical transformation of vegetable oils.

(ii) With the aid of equations, describe the chemical reaction involved in the transformations stated in (b)(i). 

 

(c) Certain properties of Beryllium (Be) and its compounds differ from those of Magnesium (Mg) and its compounds, but rather resembles those of Aluminium and its compounds. Explain briefly why this is so.

 

(d) Write balanced equation for the reaction between iodine and aqueous sodium trioxothiosulphate(VI).