Question

MCQs

The Anion does NOT gives positive test with dil. H2SO4 and Conc. H2SO4

a) cl- b) co3- c) CH3coo- d) So4-

Plz Ans Fast....
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Answer 1

Answer:

c) is the correct answer

Answer 2

Sulphate anion ($SO^{-2}_{4}$) does NOT give positive test with dil. H2SO4 and Conc. H2SO4.

This question uses the concept of Qualitative analysis of Anions

Identification of acid radicals using H2SO4 acid

• Carbonate ion ($CO^{-2}_{3}$) react with both conc. H2SO4 and dilute H2SO4 to give out CO2 gas.
• Chloride ion ($Cl^{-}$ ) and Acetate ion ($CH_{3}COO^{-}$ ) react with only conc. H2SO4 to give out their characteristic gases.
• Sulphate ion ($SO^{-2}_{4}$) does not react with either dilute or conc. H2SO4 acid. Therefore, it cannot be identified by sulphuric acid test.

So, Sulphate anion ($SO^{-2}_{4}$) does NOT give positive test with dil. H2SO4 and Conc. H2SO4.