Skip to content

Menu

Game modes

Account

← Organic Chemistry
GK QUESTION#3229

Assertion (A): Hydrocarbon dienes contain exactly two carbon–carbon double bonds.

Reason (R): The presence of two double bonds alone makes a compound aromatic.

Choose the correct option.

  1. ABoth A and R are true, and R is the correct explanation of A.
  2. BA is true, but R is falseCorrect answer
  3. CBoth A and R are true, but R is not the correct explanation of A
  4. DBoth A and R are false
Show AnswerHide Answer

Answer

B. A is true, but R is false

Show ExplanationHide Explanation

Explanation

Hydrocarbon dienes contain two carbon–carbon double bonds. Two double bonds alone do not establish aromaticity, which requires appropriate cyclic conjugation and electronic conditions. Buta-1,3-diene is a simple non-aromatic counterexample. The assertion is true and the reason false.

Sign in to report a question issue

Explore this topic

Which listed process causes browning and flavour development when sugars are heated?What is the general name for deterioration of fats and oils through oxidation or hydrolysis, producing unpleasant flavours…Consider the following statements about usual industrial and food-additive roles. 1. Potassium metabisulphite is used as a food…