NCERT Solutions for Chapter: Redox Reactions, Exercise 1: Multiple Choice Questions (Type-I)

Using the standard electrode potential, find out the pair between which redox reaction is not feasible.

${\mathrm{E}}^{⊝}$ values: ${\mathrm{Fe}}^{3+}/{\mathrm{Fe}}^{2+}=+0.77; {\mathrm{I}}_2/{\mathrm{I}}^{-}=+0.54$

                     ${\mathrm{Cu}}^{2+}/\mathrm{Cu}=+0.34;{\mathrm{Ag}}^{+}/\mathrm{Ag}=+0.80\mathrm{V}$

Thiosulphate reacts differently with iodine and bromine in the reactions given below:

$2{\mathrm{S}}_2{\mathrm{O}}_3^{2-}+{\mathrm{I}}_2\to {\mathrm{S}}_4{\mathrm{O}}_6^{2-}+2{\mathrm{I}}^{-}$

${\mathrm{S}}_2{\mathrm{O}}_3^{2-}+{\mathrm{Br}}_2+5{\mathrm{H}}_2\mathrm{O}\to 2{\mathrm{SO}}_4^{2-}+2{\mathrm{Br}}^{-}+10{\mathrm{H}}^{+}$

Which of the following statements justifies the above dual behaviour of thiosulphate?

The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct in this respect?

In which of the following compounds, an element exhibits two different oxidation states.

Which of the following arrangements represent increasing oxidation number of the central atom?

The largest oxidation number exhibited by an element depends on its outer electronic configuration. With which of the following outer electronic configurations the element will exhibit the largest oxidation number? 

Identify disproportionation reaction 

Which of the following elements does not show disproportionation tendency?