1. Sulphuric acid is used to provide an acidic medium during redox titration and not HCl and HNO₃.Why?
2. Calculate the equivalent weight of KMnO₄ in acidic ,basic and neutral medium.
3. Among the lanthanides Ce(III), can be easily oxidised to Ce(IV). Why?
4. Which of the two La(OH)₃ and Lu(OH)³ is more basic and why?

Kindly refer to the following links for  a few of your queries and post the remaining ones in separate threads.

2) https://www.meritnation.com/ask-answer/question/what-is-the-eqvivalent-weight-of-kmno4-in-neutral-medium/any-chapter/1288775

3) https://www.meritnation.com/ask-answer/question/ce3-is-easily-oxidised-to-ce4-why/chemistry/2585628