1.

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

Answer»

2
3
1
zero

Solution :`4FeS_2 + 11O_2 to 2Fe_2O_3 + 8SO_2`
`2SO_2 + O_2 to 2SO_3 `
`SO_3 + H_2O to H_2SO_4 ` DIBASIC ACID


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