Which of the following is WRONGLY matched?

Correct option is B

The correct answer is (b) Calcium carbonate – slaked lime.
· This is incorrectly matched because slaked lime is actually calcium hydroxide (Ca(OH)₂), not calcium carbonate. Calcium carbonate (CaCO₃) is commonly known as limestone or chalk.
Additional Knowledge:
· Sodium carbonate – washing soda: Correct, sodium carbonate (Na₂CO₃) is indeed known as washing soda.
· Sodium hydroxide – caustic soda: Correct, sodium hydroxide (NaOH) is commonly referred to as caustic soda.
· Sodium chloride – common salt: Correct, sodium chloride (NaCl) is known as common salt.