Q2 of 312 Page 262

Which of the following will give brisk effervescence with sodium hydrogen carbonate and why?

CH3COOH, CH3CH2OH

When CH3COOH reacts with sodium hydrogen carbonate, carbon dioxide (CO2) gas is evolved with effervescence.

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60 You are given an organic compound having the molecular formula C3H8• Give the name and formula of the compound formed:

(a) when one H atom of C3H8 is replaced by a Cl atom.


(b) when one H atom of C3H8 is replaced by OH group.


(c) when one H atom of C3H8 is replaced by a CHO group.


(d) when one H atom of C3H8 is replaced by a COOH group.


(e) when two H atoms joined to the middle carbon atom of C3H8 are replaced by one O atom.

 1 Name the gas evolved when ethanoic acid is added to sodium carbonate. How would you prove the presence of this gas? 3 Name the functional group present in an organic compound which gives brisk effervescence with NaHCO3• 4 Name the hydrocarbon formed when ethanol is heated with cone. H2S04 at 170 �C? What is this reaction known as?