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Q. No.x & y are the number of moles of electrons involved respectively during oxidation of \(I^-\) to \(I_2\) & \(S^{2-}\) to S by acidified \({K}_2 {Cr}_2 {O}_7 .\) The value of x+y is?
1. 10
2. 12
3. 16
4. 18
1. 10
2. 12
3. 16
4. 18
Subtopic: Balancing of Equations |
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Level 2: 60%+
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Hints
Find the number of moles of H⁺ ions required for 1 mole of MnO₄⁻ to oxidise oxalate ions
completely to CO₂ in an acidic medium.
1. Eight (8)
2. Four (4)
3. Ten (10)
4. seven (7)
completely to CO₂ in an acidic medium.
1. Eight (8)
2. Four (4)
3. Ten (10)
4. seven (7)
Subtopic: Balancing of Equations |
55%
Level 3: 35%-60%
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\(\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{xH}^{+}+\mathrm{ye}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+\mathrm{AH}_2 \mathrm{O}\)
Balance the above reaction and find \(\text{x,y}~ \text{and} ~\text{A}\):
1. \(\text{x}=7,\text{y}=6,\text{A}=14\)
2. \(\text{x}=14,\text{y}=6,\text{A}=7\)
3. \(\text{x}=14,\text{y}=3,\text{A}=7\)
4. \(\text{x}=8,\text{y}=2,\text{A}=1\)
Balance the above reaction and find \(\text{x,y}~ \text{and} ~\text{A}\):
1. \(\text{x}=7,\text{y}=6,\text{A}=14\)
2. \(\text{x}=14,\text{y}=6,\text{A}=7\)
3. \(\text{x}=14,\text{y}=3,\text{A}=7\)
4. \(\text{x}=8,\text{y}=2,\text{A}=1\)
Subtopic: Balancing of Equations |
88%
Level 1: 80%+
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After completing the reaction, find out sum of the coefficients of all the species involved in the balanced equation:
\(2 \mathrm{MnO}_4^{-}+\mathrm{I}^{-} \xrightarrow[\text { Medium }]{\text { Alkaline }}\)
1. 8
2. 9
3. 6
4. 4
\(2 \mathrm{MnO}_4^{-}+\mathrm{I}^{-} \xrightarrow[\text { Medium }]{\text { Alkaline }}\)
1. 8
2. 9
3. 6
4. 4
Subtopic: Balancing of Equations |
59%
Level 3: 35%-60%
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Hints
Balance the following chemical equation and choose the option with the correct set of values of x, y, z, and p:
\(\mathrm{xCl}_2+\mathrm{yOH}^{-} \longrightarrow \mathrm{zCl}^{-}+\mathrm{pClO}^{-}\)
1. \(\text{x}=1,\text{y}=2,\text{z}=2,\text{p}=1\)
2. \(\text{x}=\text{y}=\text{z}=\text{p}=1\)
3. \(\text{x}=1,\text{y}=1,\text{z}=2,\text{p}=1\)
4. \(\text{x}=1,\text{y}=2,\text{z}=1,\text{p}=1\)
\(\mathrm{xCl}_2+\mathrm{yOH}^{-} \longrightarrow \mathrm{zCl}^{-}+\mathrm{pClO}^{-}\)
1. \(\text{x}=1,\text{y}=2,\text{z}=2,\text{p}=1\)
2. \(\text{x}=\text{y}=\text{z}=\text{p}=1\)
3. \(\text{x}=1,\text{y}=1,\text{z}=2,\text{p}=1\)
4. \(\text{x}=1,\text{y}=2,\text{z}=1,\text{p}=1\)
Subtopic: Balancing of Equations |
Level 3: 35%-60%
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The reaction of sulphur in an alkaline medium is given below:
The value of 'a' is:
| 1. | 10 | 2. | 12 |
| 3. | 14 | 4. | 17 |
Subtopic: Balancing of Equations |
74%
Level 2: 60%+
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Consider the following reaction :
\(a\mathrm{Cu}+b\mathrm{HNO}_{3} \rightarrow c\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+d\mathrm{NO}+e\mathrm{H}_{2} \mathrm{O}\)
The values of a, b, and e in the reaction are, respectively:
1. 3, 8 and 4
2. 5, 2 and 8
3. 5, 2 and 16
4. 2, 5 and 8
Subtopic: Balancing of Equations |
75%
Level 2: 60%+
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Q. No.
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