JEE Previous Year Question

The compound(s) formed upon combustion of sodium metal in excess air is(are)

Topic: JEE PYQ

Answer: A, B. Full step-by-step solution below.

  1. A
  2. BO
  3. C
  4. DNaOH

Correct answer: A, B

Solution

(a,b) On combustion in excess of air alkali metals form different type of oxides as given in the following table.
Principal Combustion Product (Minor Product)
Alkali Metal
Oxide
Peroxide
Superoxide
Li



Na



K



Rb



Cs


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