The oxidation number of oxygen in is respectively -
1. 3, and 2
2. 1, and 0
3. 0, and 1
4. -0.33, and -1
The oxidation number of phosphorus in \(Ba \left(H_{2} PO_{2}\right)_{2}\) is-
1. -1
2. +1
3. +2
4. +3
Which of the following reactions does not involve disproportionation process?
1.
2.
3.
4.
Balance the following equation and choose the quantity that is the sum of the coefficients of reactants and products :
1. 16
2. 13
3. 18
4. 12
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
In the equation,
the coefficients of are respectively:
1. | 6, 7 | 2. | 6, 14 |
3. | 5, 7 | 4. | 5, 14 |
The oxidation state of Cr in is -
1. | –6 | 2. | +12 |
3. | +6 | 4. | +4 |
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:
1. | Ag > Cr > Al > K | 2. | K > Al > Cr > Ag |
3. | K > Al > Ag > Cr | 4. | Al > K > Ag > Cr |
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