Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is

Iron sulphide is heated in air to form A, an oxide of sulphur. A is di

1.	Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is
A.	2
B.	3
C.	1
D.	zero
Answer» B. 3

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Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is

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