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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pb054

Select the correct statement(s).

  1. A is soluble in excess aqueous ammonia.
  2. BAll bond lengths in are equal.
  3. CAluminium is rendered passive by concentrated .
  4. DLithium aluminium hydride can be prepared from and in ether.

Answer: C, D

in dry ether, so A is true. Conc. builds a protective oxide film, so B is true. In the bridging bonds are longer than the terminal ones, so C is false. dissolves in strong alkali but not in ammonia, so D is false.
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