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Why is KMnO4 kept in dark bottles ?...

Why is `KMnO_4` kept in dark bottles ?

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### Step-by-Step Solution: 1. **Understanding KMnO4**: Potassium permanganate (KMnO4) is a chemical compound that is commonly used in laboratories and various applications due to its strong oxidizing properties. 2. **Photosensitivity of KMnO4**: KMnO4 is known to be photosensitive, meaning it can undergo chemical changes when exposed to light. This sensitivity can lead to its decomposition. 3. **Effect of Light on KMnO4**: When KMnO4 is exposed to light, even a small amount can provide sufficient energy for the compound to oxidize water. This reaction can lead to the breakdown of KMnO4 into other products, which diminishes its effectiveness. ...
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. What happens when KMnO4 is heated ?

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  2. What is Baeyer's reagent ?

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  3. Why is KMnO4 kept in dark bottles ?

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  4. Why is HCl not used to acidify a permanganate solution in volumetric e...

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  5. Why is K(2)Cr(2)O7 generally preferred over Na(2)Cr(2)O(7) , in volume...

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  6. What happens when chromates are kept in acidic solution and dichromate...

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  7. In permanganate ion, all the bonds formed between Mn and oxygen are co...

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  8. Why lanthanoids and actinoids are called f-block elements?

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  9. What is the maximum oxidation state in actinoids?

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  10. State the common characteristic of lanthanoids and actanoids which pla...

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  11. Give the general electronic configuration of actinoids

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  12. The size of the trivalent cations in the lanthanoid series decreases s...

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  13. Out of the following identify (i) the *d' block element (ii) the of bl...

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  14. State a consequence of lanthanoid contraction shown by transition elem...

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  15. Write outer electronic configuration of lanthanoids.

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  16. Which trivalent cation is largest in lanthanoid series ?

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  17. Write any two uses of pyrophoric alloys.

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  18. Write are non-stoichimetric oxides ? Give one example.

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  19. Give one use each of (i) niobium (ii) tantalum.

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  20. Give two properties in which interstitial compounds differ from its el...

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