NEET Chemistry The s-Block Elements Questions Solved


When magnesium ribbon is heated to redness in an atmosphere of nitrogen and subsequently cooled with water, the gas evolved is-

(A) N2                                               

(B) NH3

(C) H2                                               

(D) CO2

(B). Magnesium reacts with nitrogen to form magnesium nitride Mg3N2 as a greenish yellow amorphous powder. It reacts with water forming magnesium hydroxide and ammonia.

Mg3N2+6H2O3MgOH2+2NH3

Difficulty Level:

  • 18%
  • 49%
  • 22%
  • 13%
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