Concept:Ethanol is a neutral compound and does not change the colour of litmus paper.
Explanation:Litmus paper is an acid–base indicator that changes colour based on the pH of a solution.
Blue litmus turns red in acidic solutions (pH < 7).
Red litmus turns blue in basic solutions (pH > 7).
Ethanol (
C2​H5​OH) does not release
H+ or
OH− ions when dissolved in water.
Its aqueous solution is neutral with a pH of 7.
Therefore, ethanol causes no colour change in either blue or red litmus paper.
It does not act as an acid or a base in this test.
Thus, litmus remains unaffected by ethanol, confirming its neutral nature.
Answer:Litmus is neutral towards ethanol.