On addition to a small amount of KMnO4 to concentrated H2SO4, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.
1. Mn2O7
2. MnO2
3. MnSO4
4. Mn2O3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because
1. is formed as the product
2. Reaction is exothermic
3. catalyses the reaction
4. acts as autocatalyst
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biologyacts as an oxidizing agent in an acidic medium. The number of moles of that will be needed to react with one mole of sulphide ions in an acidic solution is
1. | \(\dfrac{2}{5}\) | 2. | \(\dfrac{3}{5}\) |
3. | \(\dfrac{4}{5}\) | 4. | \(\dfrac{1}{5}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyKMnO4 acts as an oxidising agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidised to .........
1. | \( I_{2}\) | 2. | \( I O^{-}\) |
3. | \( I O_{3}^{-}\) | 4. | \(I O_{4}^{-}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhy is HCl not used to make the medium acidic in oxidation reactions of in acidic medium?
1. | Both HCl and KMnO4 act as oxidising agents |
2. | KMnO4 oxidises HCl into Cl2, which is also an oxidising agent |
3. | KMnO4 is a weaker oxidising agent than HCl |
4. | KMnO4 acts as a reducing agent in the presence of HCl |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology