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JEE Advanced2022Chemistryp Block Elements (Group 13 & 14)Actual

The treatment of galena with HNO 3 produces a gas that is

Options

  1. Aparamagnetic
  2. Bbent in geometry
  3. Can acidic oxide
  4. Dcolorless

Correct answer

A. paramagnetic

Step-by-step solution

Concentrated nitric acid is a strong oxidising agent and attacks most metals except noble metals such as gold and platinum. The products of oxidation depend upon the concentration of the acid, temperature and the nature of the material undergoing oxidation. PbS + dil . HNO 3 → Pb NO 3 2 + S + NO + H 2 O NO is paramagnetic due to the presence of unpaired electron. It is a neutral oxide. It is colourless. Hence, A and D are correct statements.

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