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Question

What is Bengal saltpetre and nitre?


  1. K₂SO₃

  2. KNO₂

  3. None of the choices

  4. KNO₃


Solution

The correct option is D

KNO₃


Bengal saltpetre and nitre are both same salt.

It is potassium nitrate KNO₃ but used with different terms. The nitre is the mineral form of potassium nitrate.

Potassium nitrate occurs as crusts on the surface of the Earth, on walls and rocks, and in caves.

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