Redox reactions practice · Mixed difficulty

Fluorine is a strong oxidising agent because :

In the reaction, $\mathrm{NaH} + {\mathrm{H}_2}\mathrm{O} \to \mathrm{NaOH} + {\mathrm{H}_2}$:

Statement-I: $\mathrm{H}_2 \mathrm{SO}_4$ can act as reducing agent and oxidising agent.

Statement-II: Sulphur can not increase its oxidation number beyond +6.

Which of the following is not a redox reaction?

Number of moles of $\mathrm{MnO}_4^ -$ required to oxidise one mole of ferrous oxalate completely in acidic medium will be :

Identify the substance oxidised, reduced, oxidising agent and reducing agent respectively from the following reaction.

$2 \mathrm{AgBr}(s)+\mathrm{C}_6 \mathrm{H}_6 \mathrm{O}_2(a q) \longrightarrow 2 \mathrm{Ag}(s)+2 \mathrm{HBr}(a q)+\mathrm{C}_6 \mathrm{H}_4 \mathrm{O}_2(a q)$

For reducing one mole of $\mathrm{F}{\mathrm{e}^{2 + }}$ion to $Fe$, the number of faraday of electricity is :

Assertion: Among $\mathrm{Br}^-, \mathrm{O}_2^{2-}, \mathrm{H}^-$ and $\mathrm{NO}_3^-,$ the ions that could not act as oxidising agents are $\mathrm{Br}^{-}$and $\mathrm{H}^{-}.$

Reason: $\mathrm{Br}^{\ominus}$ and $\mathrm{H}^{-}$ could not be reduced.

The reaction; ${\mathrm{H}_2}\mathrm{S} + {\mathrm{H}_2}{\mathrm{O}_2} \to 2{\mathrm{H}_2}\mathrm{O} + \mathrm{S}$ shows :

Which does not form two or more chlorides?

Statement-I: ${KClO}_3 \rightarrow {KClO}_4+{KCl}$. This is a disproportionation reaction.
Statement-II: The reaction in which one substance gets oxidised and reduced is known as disproportionation reaction.

Oxidation number of carbon in carbon sub oxide $\left( {{\mathbf{C}_\mathbf{3}}{\mathbf{O}_\mathbf{2}}} \right)$

Which of the following statement(s) is/are correct ?

(i) Oxidation state of carbon in $\mathrm{C}_3 \mathrm{H}_4$ is $-(4 / 3)$.

(ii) Electrons are never shared in fraction.

$\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ is not a self indicator but

Oxidation is a process which involves :

The maximum oxidation state of oxygen is

A solution of sulphur dioxide in water reacts with ${H}_2 {S}$ precipitating sulphur. Here sulphur dioxide acts as

Assertion: ${KCl} / {NaCl} / {NH}_4 {Cl}$ etc. cannot be used in the salt bridge of a cell containing silver.

Reason: A salt bridge contains concentrated solution of an inert electrolyte like ${KCl}, {KNO}_3, {NH}_4 {NO}_3$ etc. or solidified solution of such as electrolyte in agar-agar and gelatine.

Consider the following reaction, $xMnO_4^ - + y{C_2}O_4^{2 - } + z{H^ + } \to xM{n^{2 + }} + 2yC{O_2} + \frac{z}{2}{H_2}O$ The values of $x$, $y$ and $z$ in the reaction are respectively

Select the compound in which the oxidation state of oxygen is -1

In which reaction is hydrogen acting as an oxidising agent?

Which of the following involves transfer of five electrons?

Given below are two statements.
One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Aluminium is extracted from bauxite by the electrolysis of molten mixture of $A{l_2}{O_3}$ with cryolite.
Reason (R) The oxidation state of $Al$ in cryolite is +3.
In the light of the above statements, choose the most appropriate answer from the options given below.

What is the oxidation number of chlorine in $\mathrm{ClO}_3^ -$?

Which of the following is not a redox reaction?

Which of the following elements does not show disproportionation tendency?

Which of the following is not an intramolecular redox reaction?

An increase in the oxidation number of the element is termed as

Oxalic acid on reacting with acidified $\mathrm{KMn}{\mathrm{O}_4}$ is oxidised to :

The oxide, which cannot act as a reducing agent, is