Questions from TNPSC Group 1 Exam: General Science : Q. Indian Salt Petre is A. Ammonium Nitrate(NH 4 NO 3 ) B. Sodium Nitrate(Na NO 3 ) C. Potassium Nitrate(KNO 3 ) D. Calcuim Nitrate(Ca NO 3 ) Answer: Potassium Nitrate(KNO 3 ) Potassium Nitrate(KNO 3 ) is one of the several Nitrogen containing Compounds collectively referred as Salt petre.
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