If a few drops of concentrated acid accidentally spills over the hand of a student, what should be done?
A. Wash the hand with a saline solution
B. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
C. After washing with plenty of water, apply a solution of sodium hydroxide on the hand
D. Neutralise the acid with a strong alkali
Answer:B
If a few drops of concentrated acid accidentally spills over the hand of a student, what should be done?
A. Wash the hand with a saline solution B. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate C. After washing with plenty of water, apply a solution of sodium hydroxide on the hand D. Neutralise the acid with a strong alkali
Explanation: In such an accident, washing the hands with water will dilute the acid and wash it out. Any remaining acid will be neutralized with sodium hydrogen carbonate (baking soda) as it is a base. This will minimize the effect of damage caused by acid to the skin.