COMEDK · Chemistry · 9. Redox Reactions
\(25 \mathrm{~mL}\) of \(0.08 \mathrm{~N}\) Mohr salt solution is oxidised by \(20 \mathrm{~mL}\) of \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) in acid medium. The mass of Mohr's sallt present in 500 cc is
- A \(15.68 \mathrm{~g}\)
- B \(19.6 \mathrm{~g}\)
- C \(39.68\)
- D \(39.2 \mathrm{~g}\)
Answer & Solution
Correct Answer
(A) \(15.68 \mathrm{~g}\)
Step-by-step Solution
Detailed explanation
The reaction of Miohr's salt and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) is as follow: \(6 \mathrm{Fe}^{2+}+\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+14\left[\mathrm{H}^{+}\right] \longrightarrow 6 \mathrm{Fe}^{3+}+2 \mathrm{Cr}^{3+}+7 \mathrm{H}_{2} \mathrm{O}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Benzene diazonium chloride when warmed with water gives a compound, whose Sodium salt when reacted with Allyl bromide gives compound \([\mathrm{X}]\). Identify \([\mathrm{X}]\).COMEDK 2025 Medium
- What would be the volume of water required to dissolve \(0.2 \mathrm{~g}\) of \(\mathrm{PbCl}_2\) of molar mass \(278 \mathrm{~g} / \mathrm{mol}\) to prepare a saturated solution of the salt? \((\mathrm{K}_{\mathrm{SP}}\) of \(\mathrm{PbCl}_2=3.2 \times 10^{-8})\)COMEDK 2023 Medium
- What is the IUPAC name of following compound?
COMEDK 2021 Easy - What would be the EMF of the cell in which the following reaction occurs:
\(\begin{aligned}
& \mathrm{Cd}(\mathrm{S})+2 \mathrm{H}^{+} \rightarrow \mathrm{Cd}^{2+}+\mathrm{H}_{2(\mathrm{~g})} \\
& {\left[\mathrm{H}^{+}\right]=0.02 \mathrm{M} \quad \mathrm{E}^0\left(\mathrm{Cd}^{2+} / \mathrm{Cd}\right)=-0.4 \mathrm{~V},\left[\mathrm{Cd}^{2+}\right]=0.01 \mathrm{M} \text { and partial pressure of } \mathrm{H}_2 \text { gas }=0.8 \mathrm{~atm} .}
\end{aligned}\)COMEDK 2024 Medium - Benzoin isCOMEDK 2016 Medium
- When a mixture of calcium benzoate and calcium formate is dry distilled, we getCOMEDK 2019 Hard
More PYQs from COMEDK
- Hofmann's bromamide reaction is to convertCOMEDK 2020 Medium
- Two particles, one heavy and the other light, placed at 50 cm from each other, are under the influence of gravitational force of one another. If mass of the heavier particle is 4 kg and its acceleration under the influence of gravitational force is \(5 \times 10^{-10}\ ms^{-2}\), find the mass of the lighter particle.COMEDK 2026 Easy
- In the metallurgy of aluminium, when the fused matrix is electrolysed, the overall reduction reaction isCOMEDK 2015 Medium
- A bicycle generator crcates \(1.5 \mathrm{~V}\) at \(15 \mathrm{~km} / \mathrm{h}\). The cmf generated at \(10 \mathrm{~km} / \mathrm{h}\) isCOMEDK 2015 Easy
- The number of possible natural oscillations of air column in a pipe closed at one end of length \(85 \mathrm{~cm}\) whose frequencies lie below \(1250 \mathrm{~Hz}\) are (velocity of sound \(=340 \mathrm{~ms}^{-1}\))COMEDK 2024 Medium
- A pith ball of mass 'm' gram and charge 'Q' is suspended using a mass less silk thread near a large charged conducting metal sheet of area 'A' and surface charged density '\(\sigma\)'. If the silk thread makes an angle \(\Theta\) with the metal sheet, then:COMEDK 2026 Medium