NEET Chemistry The s-Block Elements Questions Solved


Sodium looses its lustre on exposure to air due to formation of-

(A) Na2O, NaOH and Na2CO3                     

(B) Na2O and NaOH

(C) Na2O and Na2CO3                                 

(D) NaOH and Na2CO3

(A). In air, a layer of Na2O, NaOH and Na2CO3 is formed on its surface which loses its lustre.

      4Na+O22Na2O2H2O4NaOH2CO22Na2CO3+2H2O

Difficulty Level:

  • 42%
  • 24%
  • 27%
  • 9%