9701 MCQ Solution 39

Question 39: [Physical > Equilibria]:

Which ions are present in a solution of ethanol in an excess of concentrated sulphuric acid?

1 CH3CH₂O^-

2 CH3CH2O⁺H₂

3 HSO^-4

Reference: Past Exam Paper – November 2002 Paper 1 Q39

Solution 39:

Answer: C.

In this solution the sulphuric acid is the stronger acid thus will donate protons (H⁺), and the organic alcohol will accept the protons raising a positive charge in it. 

Thus 1 is incorrect since the alcohol is gaining a negative charge but should gain a positive charge. 

Hence the only valid option is C.