Practical Chemistry Mock Tests

When H₂S gas is passed through an aqueous solution containing Cu²⁺, Zn²⁺, and Mn²⁺ ions in acidic medium (dil. HCl), which precipitate is formed?

The process of removing sulphur from iron ore is called:

Which of the following statements is correct regarding the adsorption of a gas on a solid surface?

The volume of 0.1 M KMnO₄ required to completely oxidize 0.1 M FeSO₄ (50 mL) in acidic medium is:

25 mL of 0.1 M NaOH solution requires 20 mL of H₂SO₄ solution for complete neutralisation. The molarity of the H₂SO₄ solution is:

In a titration, 25 mL of 0.1 M NaOH is completely neutralized by 20 mL of HCl. What is the molarity of the HCl solution?

A primary standard used to standardize NaOH is:

In the qualitative analysis of cations, H₂S gas is passed through an acidic solution containing Cu²⁺, Zn²⁺, and Mn²⁺. Which sulfide precipitates first?