Question

1) Which of the following reagents would oxidize Cr to Cr2 , but not Ag to Ag ?

A) Co^2+
B) Ca^2+
C) Br^-
D) Co
E) Ca
F) Br2

2) Which of the following reagents would oxidize Cu to Cu2 , but not Au to Au3 ?

A) Br2
B) Co
C) Co^2+
D) Br^-
E) Ca^2+
F) Ca

Answer 1

Concepts and reason

From the given list of species, identify the species which have higher reduction potentials than but not . Also, identify the species which have higher reduction potentials than but not .

Fundamentals

Oxidation is defined as the process in which a substance loses electrons and gets oxidized whereas reduction is defined as the process in which the substance accepts electrons and gets reduced.

Oxidizing agent is the species that takes part in the chemical reaction, itself gets reduced and oxidizes the other species that is present in the reaction.

Reducing agent is the species that takes part in the chemical reaction, itself gets oxidized and reduces the other species that is present in the reaction.

Element which has higher reduction potential acts as the oxidizing agent.

Element which has lower reduction potential acts as the reducing agent.

The species which have higher reduction potentials oxidize the species which have lower reduction potential than them.

The species which can oxidize to but not to is .

The species which can oxidize to but not to is .

Ans:

The species which can oxidize to but not to is as follows:

The species which can oxidize to but not to is as follows: