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(a)In which homologous series do the following compounds belong
(i)`CH_3`CCH
(ii) `CH_3CH_2`COOH
(b)Raw rubber is heated with sulphur in the manufacture of natural rubber.
(i)What is the name given to the process?
(ii) Why is the process necessary?
(c ) Study the scheme given below and answer the questions that follow.

(i) Write an equation for the reaction between propan-1-Ol and potassium metal.
(ii) Name processes I and II
(iii) Identify the products A and B.
(iv) Name one catalyst used in process II
(v) Draw the structural formula of the repeating unit in the polymer C.
(d) State two industrial uses of methane.