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 |
The oxidation state of Cr in is -
1. | –6 | 2. | +12 |
3. | +6 | 4. | +4 |
Disproportionation reactions are:
(a)
(b)
(c)
(d)
1. (a) and (d) only
2. (a) and (b) only
3. (a), (b) and (c)
4. (a), (c) and (d)
The correct structure of tribromo octoxide is:
1. | |
2. | |
3. | |
4. |
The number of moles of KMnO4 that will be needed to react with one mole of sulphite ion in an acidic solution is:
1. | \(3 \over 5\) | 2. | \(4 \over 5\) |
3. | \(2 \over 5\) | 4. | 1 |
Number of moles of \(MnO^-_4\) required to oxidise one mole of ferrous oxalate completely in an acidic medium will be:
1. | 0.6 mole | 2. | 0.4 mole |
3. | 7.5 moles | 4. | 0.2 mole |
The strongest oxidizing agent in the above equation is:
1.
2.
3.
4.
Oxidation numbers of P in , of S in and that of Cr in are respectively:
1. +5, +6 and +6
2. +3, +6 and +5
3. +5, +3 and +6
4. -3, +6 and +6
The highest oxidation number of nitrogen among the following compounds is:
1. | 2. | ||
3. | 4. |
The change in oxidation number of chlorine when Cl2 gas reacts with hot and concentrated sodium hydroxide solution is:
1. Zero to +1 and Zero to –5
2. Zero to –1 and Zero to +5
3. Zero to –1 and Zero to +3
4. Zero to +1 and Zero to –3