Question

20
. A certain compound when burnt gave three oxides.
The first and second turned lime water milky but
second formed also form acid in water whose
pH = 3 and third element Oxide form aqueous
solution of pH = 11. The elements present in the
compound are​

Answer 1

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♦♦Carbon on burning gives CO2, which turns lime water milky.

♦♦ The second compound is H2O, which turns cobalt chloride paper pink.

♦♦Third compound is SO2.

♦♦ It is acidic in nature and hence, formed an aqueous solution of pH 3 nearly.