MHT CET · Chemistry · Redox Reactions
What is oxidation state of \(\mathrm{Mn}\) in \(\mathrm{MnO}_4^{-1}\) ?
- A \(+5\)
- B \(+6\)
- C \(+4\)
- D \(+7\)
Answer & Solution
Correct Answer
(D) \(+7\)
Step-by-step Solution
Detailed explanation
Let O.S. of \(\mathrm{Mn}\) is \(\mathrm{x}\)
\(\therefore \mathrm{x}+4(-2)=-1\)
\(x=+7\)
\(\therefore \mathrm{x}+4(-2)=-1\)
\(x=+7\)
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
- Calculate standard cell potential for a cell having following reaction,
\(2 \mathrm{Al}_{(\mathrm{s})}+3 \mathrm{Ni}^{2+} \rightarrow 2 \mathrm{Al}^{3+}+3 \mathrm{Ni}(\mathrm{s})\) \(\left(\mathrm{E}_{\mathrm{Ni}}^{\circ}=-0.25 \mathrm{~V}, \mathrm{E}_{\mathrm{A} 1}^{\circ}=-1.66 \mathrm{~V}\right)\)MHT CET 2022 Easy - Which among the following reagents forms alcohol when reacted with \(\mathrm{R}-\mathrm{COOH}\) ?MHT CET 2022 Easy
- Identify acidic amino acid from following (represented by using three letter symbols).MHT CET 2024 Hard
- IUPAC name of anisole isMHT CET 2022 Easy
- What type of glycosidic linkages are developed when excess glucose is to be stored for future use in animals?MHT CET 2024 Hard
- Which among the following is vinylic halide?MHT CET 2025 Easy
More PYQs from MHT CET
- \(\lim _{x \rightarrow 0} \frac{\mathrm{e}^{\tan x}-\mathrm{e}^x}{\tan x-x}=\)MHT CET 2025 Medium
- The maximum area of the rectangle that can be inscribed in a circle of radius \(r\) isMHT CET 2021 Hard
- What is the change in oxidation number of nitrogen in following conversion?
\( \mathrm{NO}_3^{-} \longrightarrow \mathrm{NO}_2 \)MHT CET 2021 Medium - A galvanometer has resistance ' \(\mathrm{G}\) ' and range ' \(\mathrm{V} g\) '. How much resistance is required to read voltage upto ' \(\mathrm{V}\) ' volt?MHT CET 2023 Medium
- The value of \(\mathrm{I}=\int_{\sqrt{\log _e 2}}^{\sqrt{\log _e 3}} \frac{x \sin x^2}{\sin x^2+\sin \left(\log _e 6-x^2\right)} \mathrm{d} x\) isMHT CET 2024 Medium
- If the vector equation or the plane \(\overline{\mathrm{r}}=(2 \hat{\mathrm{i}}+\hat{\mathrm{k}})+\lambda \hat{\mathrm{i}}+\mu(\hat{\mathrm{i}}+2 \hat{\mathrm{j}}-3 \hat{\mathrm{k}})\) in scalar product form is given by \(\bar{r} \cdot(3 \hat{i}+2 \hat{k})=\alpha\) then \(\alpha=\)MHT CET 2021 Medium