Redox reactions practice · Mixed difficulty

The oxidation state of $+ 3$ for phosphorus is in:

Eq.wt. of $\mathrm{N}{\mathrm{H}_3}$ in, $\mathrm{N}{\mathrm{H}_3} + {\mathrm{O}_2} \to \mathrm{NO} + {\mathrm{H}_2}\mathrm{O}$ is :

In which of the following oxygen shows -1 oxidation state?

Oxidants are substances which :

Which of the following is not a redox reaction?

The oxidation number of phosphorus vary from

A reducing agent is a substance which can

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.

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

When sulphur dioxide is passed in an acidified ${\mathrm{K}_2}\mathrm{C}{\mathrm{r}_2}{\mathrm{O}_7}$ solution, the oxidation state of sulphur is changed from

Oxygen can show positive oxidation state in compounds with

Starch gives blue colour with :

A polyvalent metal weighing $0.1 \mathrm{gm}$ and having atomic weight of 50 reacted with dilute $\mathrm{H}_2 \mathrm{SO}_4$ to give $44.8 \mathrm{~mL}$ of hydrogen at STP. The solution containing the metal in this Lower oxidation state, was found to require $60 \mathrm{~mL}$ of $0.1 \mathrm{~N}$ $\mathrm{KMnO}_4$ solution for complete oxidation. What are valencies of metal?

A sample of $2.5 \mathrm{~mol}$ of hydrazine $\left(\mathrm{N}_2 \mathrm{H}_4\right)$ loses $25 \mathrm{~mol}$ of electrons on being converted to a new compound $\mathrm{X}.$ Assuming that there is no loss of nitrogen in the formation of the new compound, what is the oxidation number of nitrogen in compound $\mathrm{X}?$

Oxidation is a process which involves :

The process in which oxidation number increases is

$A,B$ and $C$ are three elements forming a part of compound in oxidation states of $+ 2,\mathrm{ } + 5\mathrm{ }and\mathrm{ } - 2$ respectively. What could be the compound?

The coefficients of $\;{\mathrm{I}^ - },\mathrm{\;\;IO}_3^ - \mathrm{\;}\,\,\mathrm{and\;}{\mathrm{H}^ + }$ in the redox reaction, ${I^ - } + \;IO_3^ - + {H^ + } \to {I_2} + {H_2}O$ in the balanced form respectively are

In the reaction of ${\mathrm{O}_3}$ and ${\mathrm{H}_2}{\mathrm{O}_2},$ the later acts as :

In which reaction change in oxidation number of underlined atom is maximum when all of them react with $C{l_2}$ water:-

When $\mathrm{S}{\mathrm{O}_2}$ is passed in acidified potassium dichromate solution, the oxidation state of S is changed from :

A group of methods of quantitative chemical analysis involving the measurement of volume of reacting substance is known as :

A, B, C are three element forming a compound in oxidation state of $+1,+6$, and -2 respectively. the compound is :

The lanthanoid that does not show + 4 oxidation state is

Oxidation numbers of Fe in$\mathrm{F}{\mathrm{e}_3}{\mathrm{O}_4}$ are :

Elements which generally exhibit multiple oxidation states and whose ions are coloured are known as :

The common positive oxidation states for an element with atomic number 24, are

Among the properties given below, the set of properties shown by $\mathrm{C}{\mathrm{N}^ - }$ ion towards metal species is :1. Reducing; 2. Oxidising ; 3. Complexation

Which does not form two or more chlorides?

Statement-I: In the reaction, $\frac{1}{2} \mathrm{O}_2+\mathrm{F}_2 \rightarrow \mathrm{OF}_2, \mathrm{~F}_2$ is oxidant.

Statement-II: Fluorine cannot show positive oxidation state.