Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 1: Level 1

The oxidation state of an oxygen atom in potassium superoxide is:

The oxidation number of sulphur in perdisulphuric acid is:

Which one of the following is correct regarding the reaction of fluorine with water?

$2 {\mathrm{F}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)⟶4{\mathrm{H}}^{+}\left(\mathrm{aq}\right)+4 {\mathrm{F}}^{-}\left(\mathrm{aq}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Which of the following statements is/are true:
I. The process of oxidation leads to the gain of electrons.
II. The process of oxidation leads to the loss of electrons.
III. The process of reduction leads to the gain of electrons.
IV. The process of reduction leads to the loss of electrons.

Select the correct answer from the codes given below.

Which of the following causes the rusting of iron?
I. Oxidation

II. Reduction
III. Chemical reaction with oxygen.
IV. Chemical reaction with ${\mathrm{CO}}_2$.
Select the correct answer from the codes given below.

In oxidation:
I. Hydrogen is displaced from a substance.
II. An electropositive element is added to or a proportion of electropositive element is increased in a substance.
Select the correct answer using the codes given below.

A reducing agent is a substance:

In the reaction $2\mathrm{Ag}+2{\mathrm{H}}_2{\mathrm{SO}}_4⟶{\mathrm{Ag}}_2{\mathrm{SO}}_4+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{SO}}_2$, sulphuric acid acts as :