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The main oxides formed on combustion of Li, Na and K in excess of air are respectively:

Options

  1. AL i 2 O 2 , N a 2 O 2 a n d K O 2
  2. BL i 2 O , N a 2 O 2 a n d K O 2
  3. CL i 2 O , N a 2 O a n d K O 2
  4. DL i O 2 , N a 2 O 2 a n d K 2 O

Correct answer

B. L i 2 O , N a 2 O 2 a n d K O 2

Step-by-step solution

In 1A group Li on reaction with excess air 4 L i + O 2 → 2 L i 2 O Na on reaction with excess air 2 N a + O 2 → N a 2 O 2 K on reaction with excess air K + O 2 → K O 2

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