[" (8) when co is parsed over solid na o H "],[" heated to "200" ( it form "]

When CO is passed over solid NaOH heated to 200^(@)C , it forms

When carbon monoxide is passed over solid caustic soda heated to 200^(@) C , it forms

When carbon monoxide is passed over solid caustic soda heated to 200^@C , it forms:

If Na is heated in presence of air, it forms

In qualitive analysis, an organic compound 'A' is heated with dry CuO ,CO_(2) gas is liberated and H_(2)O is formed . The same compound 'A' when heated with Na_(2) O_(2) , followed by boiling with HNO_(3) and ammonium molybdate gives yellow precipitate. Based on the tests, the elements present in compound 'A' are __________.