Q. No.While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
1. Clamp and phenolphthalein
2. Pipette and distilled water
3. Burette and porcelain tile
4. Bunsen burner and measuring cylinder
Subtopic: Redox Titration & Type of Redox |
54%
Level 3: 35%-60%
Please attempt this question first.
Hints
Which of the following can show disproportionation reaction?
1. \(MnO^-_4\)
2. \(ClO^-_4\)
3. \(MnO^{2-}_4\)
4. \(F_2\)
1. \(MnO^-_4\)
2. \(ClO^-_4\)
3. \(MnO^{2-}_4\)
4. \(F_2\)
Subtopic: Redox Titration & Type of Redox |
80%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which one of the following is an example of a disproportionation reaction?
| 1. | \(\small{3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) |
| 2. | \(\small{\mathrm{MnO}_{4}^{-}+4 \mathrm{H}^{+}+4 e^{-} \rightarrow \mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}}\) |
| 3. | \(\small{10 \mathrm{I}^{-}+2 \mathrm{MnO}_{4}^{-}+16 \mathrm{H}^{+} \rightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_{2} \mathrm{O}+5 \mathrm{I}_{2}}\) |
| 4. | \(\small{8 \mathrm{MnO}_{4}^{-}+3 \mathrm{~S}_{2} \mathrm{O}_{3}^{2-}+\mathrm{H}_{2} \mathrm{O} \rightarrow 8 \mathrm{MnO}_{2}+6 \mathrm{SO}_{4}^{2-}+2 \mathrm{OH}^{-}}\) |
Subtopic: Redox Titration & Type of Redox |
88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is a redox reaction?
1. NaCl + KNO3 \(\rightarrow\) NaNO3 + KCl
2. CaC2O4 + 2HCl \(\rightarrow\) CaCl2 + H2C2O4
3. Ca(OH)2 + 2NH4Cl \(\rightarrow\) CaCl2 + 2NH3 + 2H2O
4. 2K[Ag(CN)2] + Zn \(\rightarrow\) 2Ag + K2[Zn(CN)4]
Subtopic: Redox Titration & Type of Redox |
77%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl does which of the following?
1. It furnishes H+ ions in addition to those from oxalic acid
2. It reduces permanganate to Mn2+
3. It oxidises oxalic acid to carbon dioxide and water
4. It gets oxidised by oxalic acid to chlorine
Subtopic: Redox Titration & Type of Redox |
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
50 mL of KMnO4 solution is used for titration with 20 mL of 2M oxalic acid solution in Acidic medium. The molarity of KMnO4 solution is x × 10–2 M. The value of x is:
1. 32
2. 35
3. 26
4. 94
1. 32
2. 35
3. 26
4. 94
Subtopic: Redox Titration & Type of Redox |
82%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following undergoes disproportionation reaction in aqueous alkaline medium?
| 1. | \(\mathrm{I}_2~ \text {and}~ \mathrm{Cl}_2\) only | 2. | \(\mathrm{F}_2~\text {and}~\mathrm{Cl}_2\) only |
| 3. | \(\mathrm{I}_2~\text {and}~\mathrm{Br}_2\) only | 4. | \(\mathrm{Cl}_2, \mathrm{Br}_2~\text {and}~\mathrm{I}_2\) only |
Subtopic: Redox Titration & Type of Redox |
68%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements:
| Statement I: | Potassium hydrogen phthalate is primary standard for \(NaOH\) solution. |
| Statement II: | Phenolphthalein is used to detect completion of titration. |
| 1. | Both statement-I and statement-II are correct |
| 2. | Statement-I is correct and statement-II is incorrect |
| 3. | Statement-I is incorrect and statement-II is correct |
| 4. | Both statement-I and statement-II are incorrect |
Subtopic: Redox Titration & Type of Redox |
88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is a disproportionation reaction?
1. All A, B, C and D
2. A and B only
3. A and C only
4. A, B and C only
| A. | \(\mathrm{Cu}^{+} \longrightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}\) |
| B. | \(\mathrm{MnO}_4^{2-} \longrightarrow \mathrm{MnO}_4^{-}+\mathrm{MnO}_2\) |
| C. | \(\mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{O}_2+\mathrm{H}_2 \mathrm{O}\) |
| D. | \(\mathrm{CrO}_4^{2-} \longrightarrow \mathrm{Cr}^{3+}+\mathrm{H}_2 \mathrm{O}\) |
2. A and B only
3. A and C only
4. A, B and C only
Subtopic: Redox Titration & Type of Redox |
73%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
A \(\mathrm{2.0~ g}\) sample containing \(\mathrm{MnO_2}\) is treated with \(\mathrm{HCl}\) liberating \(\mathrm{Cl_2}.\) The \(\mathrm{Cl_2}\) gas is passed into a solution of \(\mathrm{KI}\) and \(\mathrm{60.0~ mL}\) of \(\mathrm{0.1 ~M ~Na_2S_2O_3}\) is required to titrate the liberated iodine. The percentage (%) of \(\mathrm{MnO_2}\) in the sample is:
\(\text{[Atomic masses (in u)}: \mathrm{Mn}=55 ; \mathrm{Cl}=35.5 ; \mathrm{O}=16, \mathrm{I} =127, \mathrm{Na}=23, \mathrm{~K}=39, ~\text {and}~\mathrm{~S}=32]\)
1. 9
2. 12
3. 15
4. 7
\(\text{[Atomic masses (in u)}: \mathrm{Mn}=55 ; \mathrm{Cl}=35.5 ; \mathrm{O}=16, \mathrm{I} =127, \mathrm{Na}=23, \mathrm{~K}=39, ~\text {and}~\mathrm{~S}=32]\)
1. 9
2. 12
3. 15
4. 7
Subtopic: Redox Titration & Type of Redox |
87%
Level 1: 80%+
Please attempt this question first.
Hints
© 2026 GoodEd Technologies Pvt. Ltd.