CBSE 2024 · Region 3 · Set 1 · Q19 · 2 marks
Complete the following ionic equations:(a)$\displaystyle 2 \mathrm{MnO}_{4}^{-}+5 \mathrm{SO}_{3}^{2-}+6 \mathrm{H}^{+} \rightarrow$(b)$\displaystyle \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14 \mathrm{H}^{+}+6 \mathrm{Fe}^{2+} \rightarrow$
Complete the following ionic equations:
(a)
$\displaystyle 2 \mathrm{MnO}_{4}^{-}+5 \mathrm{SO}_{3}^{2-}+6 \mathrm{H}^{+} \rightarrow$
(b)
$\displaystyle \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14 \mathrm{H}^{+}+6 \mathrm{Fe}^{2+} \rightarrow$
Marking-scheme solution
(a)
\[2 \mathrm{MnO}_{4}{ }^{-}+5 \mathrm{SO}_{3}{ }^{2-}+6 \mathrm{H}^{+} \longrightarrow 2 \mathrm{Mn}^{2+}+5 \mathrm{SO}_{4}{ }^{2-}+3 \mathrm{H}_{2} \mathrm{O}
\]
(b)
\[\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14 \mathrm{H}^{+}+6 \mathrm{Fe}^{2+} \longrightarrow 2 \mathrm{Cr}^{3+}+6 \mathrm{Fe}^{3+}+7 \mathrm{H}_{2} \mathrm{O}
\]
ElectrochemistryElectrochemical CellsApplyvery_short_answermedium
More from Electrochemistry
- Kohlrausch gave the following relation for strong electrolytes: Λ m=Λ m^°-A √C Which of the following…2025 · asked 4×
- (i) What should be the signs (positive/negative) for E^° Cell and Δ G^° for a spontaneous redox reaction…2023 · asked 3×
- Batteries and fuel cells are very useful forms of galvanic cell. Any battery or cell that we use as a source…2024 · asked 3×
- (i) Calculate emf of the following cell at 25°C: Zn( s) Zn^2+(0 · 001 M) Cd^2+(0 · 1 M) Cd( s) Given: E Zn^2+…2024 · asked 3×
- In a galvanic cell, chemical energy of a redox reaction is converted into electrical energy, whereas in an…2024 · asked 3×
- (i) For a galvanic cell, the following half reactions are given. Decide, which will remain as reduction…2025 · asked 3×
- Write the cell reaction and calculate the e.m.f. of the following cell at 298 K: ( 3 + 2 = 5 ) Sn(s)…2025 · asked 3×
- Four half reactions I to IV are shown below: I. 2 Cl l^- → Cl 2+2 e^- II. 4 OH^- → O 2+2 H 2 O+2 e^- III.…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.