- 1(current)
Q. No.For the redox reaction,
, the correct coefficients of the reactants for the balanced reaction are, respectively:
1. 2, 5, 16
2. 16, 3, 12
3. 15, 16, 12
4. 2, 16, 5
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When KMnO4 acts as an oxidizing agent and ultimately forms \(\left[\mathrm{MnO}_4\right]^{-2}, \mathrm{MnO}_2, \mathrm{Mn}_2 \mathrm{O}_3, \mathrm{Mn}^{+2}\)
then the number of electrons transferred in each case, respectively, are:
| 1. | 4, 3, 1, 5 | 2. | 1, 5, 3, 7 |
| 3. | 1, 3, 4, 5 | 4. | 3, 5, 7, 1 |
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In a balanced equation
, the values of x, y, z are:
| 1. | x = 3, y = 5, z = 2 |
| 2. | x = 4, y = 8, z = 5 |
| 3. | x = 8, y = 4, z = 4 |
| 4. | x = 5, y = 3, z = 4 |
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In the following equation, the products A and B are, respectively are:
\(\small Cr_2O^{2-}_7 (aq) + 3SO^{2-}_3 (aq) + 8H^+(aq) \rightarrow A + B + 4H_2O(l)\)
1. \(2 \mathrm{Cr}^{2+} ; 3 \mathrm{SO}_2 \)
2. \(2 \mathrm{Cr}^{+} ; \mathrm{S}_2 \mathrm{O}_7{ }^{2-} \)
3. \(2 \mathrm{Cr}^{3+} ; 3 \mathrm{SO}_4{ }^{2-} \)
4. \(2 \mathrm{Cr}^{3+} ; 3 \mathrm{HSO}_4{ }^{-}\)
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\(x \mathrm{Cl}_{2}+y~\mathrm{NaOH} \longrightarrow \mathrm{zNaCl}+a~\mathrm{} \mathrm{NaClO}_{3} + bH_2O\)
The ratio of \({ x + y \over z + a+b}\)will be:
| 1. | One (1) | 2. | Two (2) |
| 3. | Five (5) | 4. | Three (3) |
\(XZn+ NO^- _3+ YH^+ \rightarrow XZn^{2+}+ NH^+ _4+ ZH_2O \)
1. 4, 10, and 3
2. 3, 8, and 3
3. 3, 10, and 3
4. 4, 3, and 10
\(\text{IO}^-_3\rightarrow \text{I}_2\)
1. Six (6)
2. Four (4)
3. Ten (10)
4. Eight (8)
\(\mathrm {FeCl}_2 + \mathrm {KMnO_4} + \mathrm{HCl}~~ \rightarrow \mathrm {FeCl_3} + \ \mathrm{MnCl}_2 + ~\mathrm {H}_2\mathrm {O}\)
1. One
2. Two
3. Three
4. Four
\(2 \mathrm{~S}_2 \mathrm{O}_3^{2-}+\mathrm{I}_2 \rightarrow \mathrm{S}_4 \mathrm{O}_6^{2-}+2 \mathrm{I}^{-} \)
(a) \(\mathrm{S}_2 \mathrm{O}_3^{2-}\) gets reduced to \(\mathrm{S}_4 \mathrm{O}_6^{2-}\).
(b) \(\mathrm{S}_2 \mathrm{O}_3^{2-}\) gets oxidized to \(\mathrm{S}_4 \mathrm{O}_6^{2-}\).
(c) \(\mathrm{I}_2\) gets reduced to \(\mathrm{I}^{-}\).
(d) \(\mathrm{I}_2\) gets oxidized to \(\mathrm{I}^{-}\).
1. a, b, c
2. b, c
3. a, b, d
4. None of the above
- 1(current)
Q. No.
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