In general boiling point of covalent compounds is effected due to increasing molecular…

Chemistry · JEE Advanced · NTA ExamsChemical Bonding and Molecular Structure


In general boiling point of covalent compounds is effected due to increasing molecular weight and hydrogen bonding. Thus it is observed that the boiling point of octanol is greater that water while that of methanol is lesser than water. The other properties which are considerably affected due to hydrogen bond formation are acidic nature, melting point, anomalous behaviour of water below 4ºC., It is therefore concluded that hydrogen bonding plays a vital role in explaining many observable facts.
Ka2 of Maleic acid is lesser than Ka2 of fumaric acid due to:
  1. intramolecular hydrogen bonding in the formed after one proton removal in fumaric acid
  2. intermolecular hydrogen bonding in the ion formed after one proton removal in maleic acid
  3. intramolecular hydrogen bonding in the ion formed after one proton removal in maleic acid
  4. intermolecular hydrogen bonding in the ion formed after one proton removal in fumaric acid

Answer

(C) intramolecular hydrogen bonding in the ion formed after one proton removal in maleic acid

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