(i) Name the following:
(a) Organic compounds with same molecular formula but different structural formula.
(b) Group of organic compounds where the successive members follow a regular structural pattern, successive compounds differ by a 'CH₂' group.

(ii) Give reason for the following:
(a) Ionization potential decreases down a group.
(6) Ionic compounds do not conduct electricity in solid state

(iii) Calculate:
(a) The percentage of phosphorus in the fertilizer super phosphate Ca(H₂PO₄)₂ correct to 1 decimal point. [At. Wt. H=1, P=31, 0=16, Ca=40]
(b) Write the empirical formula of C₈H₁₈.

(iv) Answer the following questions with reference to electrorefining of copper:
(a) What is the anode made of?
(b) What do you observe at the cathode?
(c) Write the reaction taking place at the cathode

Solution

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