HOOC-COOH + NaOH 一> H2O + HOOC-COONa^+ The above reaction is an example of

COOH                            COOH

|                + NaOH 一> |                 + H2O

COOH                           COONa^+ 

The above reaction is an example of 

A. A displacement reaction 

B. A neutralization reaction

C. an elimination reaction

D. saponification

The reaction shown is:

HOOC-COOH + NaOH 一.>HOOC-COO^-Na^+ + H2O

This is ethanedioic (oxalic) acid reacting with sodium hydroxide.

Key idea

• Acid + base → salt + water

• A hydrogen ion (H⁺) from the carboxylic acid is replaced by Na⁺ from the base.

This is the definition of a neutralization reaction.

Evaluate the options

• A. Displacement reaction ❌
  Too general; this is specifically acid–base neutralization.

• B. Neutralization reaction ✅
  Correct: acid + base → salt + water.

• C. Elimination reaction ❌
  No removal of small molecules like H₂ or HX from a single compound.

• D. Saponification ❌
  Applies to esters reacting with alkali, not acids.

Correct answer ✅

B. a neutralization reaction

PQN: 46