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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sb145

A metal X burns in excess air to give a pale yellow solid Y, which reacts with cold water to give a base and HO, and with to give a carbonate and oxygen. X is sodium. Select the correct statement(s) about Y.

  1. AY reacts with as .
  2. BY with hot water liberates along with .
  3. CY contains the superoxide ion and is paramagnetic.
  4. DOne mole of Y with excess cold water gives one mole of .

Answer: A, B, D

Y is , which contains the diamagnetic peroxide ion, so the superoxide statement is false. gives 1 mol per mol (cold), and in hot water . The equation is also correct.
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