List of top Chemistry Questions on Oxidation And Reduction Reactions asked in JEE Main

Given below are two statements: Statement I: Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is highest for Zn and lowest for Sc.
Statement II: The correct order of the following complexes in terms of CFSE is [Co(H₂O)₆]²⁺<[Co(H₂O)₆]³⁺<[Co(en)₃]³⁺.
In light of the above statements, choose the correct answer from the options given below:

Which of the following complexes will show coordination isomerism?} (A) \( [\text{Ag}(\text{NH}_3)_2][\text{Ag}(\text{CN})_2] \)
(B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \)
(C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \) Choose the correct answer from the options given below:

Given below are two statements: Statement (I): Oxidising power of halogens decreases in the order \[ F_2>Cl_2>Br_2>I_2 \] which is the basis of the “Layer test”. Statement (II): “Layer test” to identify \(Br_2\) and \(I_2\) in aqueous solution involves the oxidation of bromide or iodide into \(Br_2\) or \(I_2\) respectively with \(Cl_2\), which is a type of displacement redox reaction. In the light of the above statements, choose the correct answer:

Which of the following sets includes all the species that will change the orange colour of \(K_2Cr_2O_7\) in acidic medium?

The number of ions from the following that are expected to behave as oxidising agent is: $\text{Sn}^{4+}, \, \text{Sn}^{2+}, \, \text{Pb}^{2+}, \, \text{Tl}^{3+}, \, \text{Pb}^{4+}, \, \text{Tl}^{+}$