In the equation, 

$C{r}_2{O}_7^{2-}+F{e}^{2+}+H^{+}\to C{r}^{3+}+F{e}^{3+}+H_{2}O$

the coefficients of $F{e}^{2+} and H^{+}$ are respectively:

1.	6, 7	2.	6, 14
3.	5, 7	4.	5, 14

The oxidation state of Cr in ${\mathrm{CrO}}_6$ is -

The standard electrode potential (E°) values of  Al³⁺/ Al,  Ag⁺ / Ag, K⁺ / K,  and Cr³⁺ / Cr are –1.66 V, 0.80 V, –2.93 V, & –0.79 V respectively. The correct decreasing order of the reducing power of the metal is:

In the given balanced chemical reaction

${{}^{}}_{}$
\(\mathrm{IO}_3^{-}+\mathrm{aI}^{-}+\mathrm{bH}^{+} \rightarrow \mathrm{cH}_2 \mathrm{O}+\mathrm{dI}_2\)

The values of a, b, c, and d respectively are:

1. 5, 6, 3, 3

2. 5, 3, 6, 3

3. 3, 5, 3, 6

4. 5, 6, 5, 5

Balance the following reaction and find the values of a, b and g, respectively

\(aKMnO_4 + bH_2O_2 + 3H_2SO_4 \rightarrow \)
\( dMnSO_4 + eK_2SO_4 + fO_2 + gH_2O\)

1. 2, 4, 8

2. 2, 5, 8

3. 10, 4, 16

4. 8, 5, 2

Balance the following equation and choose the quantity that is the sum of the coefficients of reactants and products :

$...{\mathrm{PtCl}}_4+...{\mathrm{XeF}}_2\to {\mathrm{PtF}}_6+....\mathrm{ClF}+...\mathrm{Xe}$

1. 16

2. 13

3. 18

4. 12

Which of the following reactions does not involve disproportionation process?

1. ${\mathrm{Cl}}_2+{\mathrm{OH}}^{-}\to {\mathrm{Cl}}^{-}+{\mathrm{ClO}}_3^{-}+{\mathrm{H}}_2\mathrm{O}$

2. $2{\mathrm{H}}_2{\mathrm{O}}_2\to {\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

3. $2{\mathrm{Cu}}^{+}\to {\mathrm{Cu}}^{2+}+\mathrm{Cu}$

4. ${\left({\mathrm{NH}}_4\right)}_{2}C{r}_2{O}_7\to {\mathrm{N}}_2+{\mathrm{Cr}}_2{\mathrm{O}}_3+4{\mathrm{H}}_2\mathrm{O}$

The oxidation number of phosphorus in \(Ba \left(H_{2} PO_{2}\right)_{2}\) is-

1. -1

2. +1

3. +2

4. +3

The oxidation number of oxygen in ${\mathrm{KO}}_3$ $\mathrm{and}$ ${\mathrm{Na}}_2{\mathrm{O}}_2$ is respectively -

1. 3, and 2
2. 1, and 0
3. 0, and 1
4. -0.33, and -1

$\mathrm{}$ \(2 \mathrm{MnO}_4^{-}+5 \mathrm{H}_2 \mathrm{O}_2+6 \mathrm{H}^{+} \rightarrow 2 \mathrm{Z}+5 \mathrm{O}_2+8 \mathrm{H}_2 \mathrm{O}\).In this reaction, Z is :

1. ${\mathrm{Mn}}^{2+}$

2. ${\mathrm{Mn}}^{4+}$

3. ${\mathrm{MnO}}_2$

4. Mn