1.

If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? (a) Wash the hand with 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) Neutralize the acid with a strong alkali

Answer»

The answer is (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate

  • Washing affected hand with plenty of water will reduce the concentration of the acid. 
  • Remaining traces of the acid can be neutralized by applying a paste of Hydrogen carbonate which is basic in nature. 
  • Though NaOH is also a base but it is corrosive in nature hence it is not used to neutralize the acid.


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