Please answer Q19 and tell why the other options are incorrect.

Dear Student,
Ethanoic acid is CH₃COOH 
1. Since it is a weak acid it reacts with carbonate giving off carbon dioxide.
    CH₃COOH + CO₃^2- $\underset{}{\to }$ CH₃COO^- + CO₂ + H₂O
2. CH₃COOH + NaOH $\underset{}{\to }$ CH₃COONa + H₂O
    Hence it neutralizes NaOH solution
3. Acids turn blue litmus red. Since ethanoic acid is an acid it shows this test.
4. Weak acids are partially ionized in an aqueous solution by definition.

Option B: 1 and 4 are correct

Regards