one compound (`"A"`) has molecular formula of `C_(2)H_(4)O_(2)` and it gives following reactions :
(i) on addition of above compound to sodium carbonate solution gives effervescence of `CO_(2)` gas and form compound `"P"` .
(ii) when compound (`"P"`) is heated with sodalime give gas (Q),then identify `"A, P, Q"` and give reaction.

A water soluble compound of molecular formula C_(3)H_(6)O give yellow crystalline solid on heating with I_(2) and Na_(2)CO_(3) . The compound is

Which of the following compounds gives brisk effervescence of CO_(2) when treated with sodium bicarbonate?

An aliphatic carboxylic acid of moleuclar formula C_(2)H_(4)O_(2) on reaction with PCl_(5) gives a compound Y. Y when heated with sodium salt of the acid produces-

An organic compound of molecular formula C_(2)H_(6)O when oxidized with alkaline KmnO_(4) solution and then treated with dilute hydrochloric acid gives a compound A. When A is warmed with ehtanol in the presence of conc .H_(2)SO_(4) it forms the compound B. B when reacted with NaOH solution gives a compound C. (i) Give the names of A, B and C. (ii) Give equations for the above reactions.

An optically active compound 'X' has molecular formula C_(4)H_(8)O_(3) . It evolves CO_(2) with NaHCO_(3) . 'X' reacts with LiAIH_(4) to give an achiral compound 'X' is: