1. | \(2 \mathrm{CuSO}_{4}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{s}) \rightarrow 2 \mathrm{Cu}(\mathrm{s})+\mathrm{Ag}_{2} \mathrm{SO}_{4}(\mathrm{aq}) \) |
2. | \(\mathrm{CuSO}_{4}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \) \(\rightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s}) \) |
3. | \(\mathrm{CuSO}_{4}(\mathrm{aq})+\mathrm{Fe}(\mathrm{s}) \) \(\rightarrow \mathrm{FeSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s}) \) |
4. | \(\mathrm{FeSO}_{4}(\mathrm{aq})+\mathrm{Zn}(\mathrm{s}) \) \(\rightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Fe}(\mathrm{s}) \) |
A set of species capable of showing disproportionation reactions is:
1. | ClO–2, ClO–3, ClO–4, Cl2 |
2. | Cl2, ClO–2, ClO–3, S8 |
3. | ClO–4, ClO–, ClO–2, F2 |
4. | ClO–3, ClO–4, H2O2, ClO– |
1. | \(2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2(\mathrm{s}) \rightarrow 2 \mathrm{PbO}(\mathrm{s})+4 \mathrm{NO}_2(\mathrm{g})+\mathrm{O}_2(\mathrm{g}) \) |
2. | \(\mathrm{N}_2(\mathrm{g})+\mathrm{O}_2(\mathrm{g}) \rightarrow 2 \mathrm{NO}(\mathrm{g}) \) |
3. | \(\small{\mathrm{Cl}_2(\mathrm{g})+2 \mathrm{OH}^{-}(\mathrm{aq}) \rightarrow \mathrm{ClO}^{-}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})+4 \mathrm{H}_2 \mathrm{O}(\ell)}\) |
4. | \(\small{\mathrm{P}_4(\mathrm{s})+3 \mathrm{OH}^{-}(\mathrm{aq})+3 \mathrm{H}_2 \mathrm{O}(\ell) \rightarrow\mathrm{PH}_3(\mathrm{g})+3 \mathrm{H}_2 \mathrm{PO}_2^{-}(\mathrm{aq})}\) |
1. | Lithium is the strongest reducing agent among the alkali metals. |
2. | Alkali metals react with water to form their hydroxides. |
3. | The oxidation number of K in KO2 is +4. |
4. | Ionisation enthalpy of alkali metals decreases from top to bottom in the group. |
1. | 8, 1, 3 | 2. | 1, 3, 8 |
3. | 3, 8, 1 | 4. | 1, 8, 3 |
The correct example of metal displacement reaction among the following is:
1.
2.
3.
4.
The oxidation states(O.S.) of sulphur in the anions follow the order:
1.
2.
3.
4.
Standard electrode potentials are:
,
Choose the correct observation if , and Fe block are kept together:
1. increases
2. decreases
3. remains unchanged
4. decreases
A non-feasible reaction among the following is:
1.
2.
3.
4.
If the oxidation numbers of A, B, and C are + 2, +5, and –2 respectively, then the possible formula of the compound is:
1. | A2(BC2)2 | 2. | A3(BC4)2 |
3. | A2(BC3)2 | 4. | A3(B2C)2 |