List of top Chemistry Questions on Oxidation Number And Oxidation States asked in JEE Main

Consider the reactions: 1. \(NaCl+K_{2}Cr_{2}O_{7}+H_{2}SO_{4} \rightarrow A + ...\) 2. \(A + NaOH \rightarrow B + ...\) 3. \(B + H_{2}SO_{4}+H_{2}O_{2} \rightarrow C + ...\) In the product 'C', X is the number of \(O_{2}^{2-}\) units, Y is the total number of oxygen atoms, and Z is the oxidation state of Cr. The value of \(X+Y+Z\) is__.
  

Given below are two statements :
Statement I : The higher oxidation states are more stable down the group among transition elements unlike p-block elements.
Statement II : Copper can not liberate hydrogen from weak acids.
In the light of the above statements, choose the correct answer from the options given below

CoCl₃.xNH₃ on reaction with excess AgNO₃(aq.) gives two moles of AgCl as precipitate.
Summation of oxidation state of Co in CoCl₃.xNH₃ and x is:

Which metal shows the highest and maximum number of oxidation states?

In which of the following compounds Mn has the highest oxidation state?

Consider the following statements:
Statement I: Stability of +1 oxidation state increases down the group in group-13.
Statement II: Atomic radius of Ga is greater than that of Al.

Statement-I : Stability of +1 oxidation state increases as Ga< In < Tl
Statement-II : Stability of +1 oxidation state increases down the group due to inert pair effect.