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Name the gas that can readily decolouris...

Name the gas that can readily decolourise acidified `KMnO_(4)` solution:

A

`SO_2`

B

`NO_2`

C

`P_2 O_5`

D

`CO_2`

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The correct Answer is:
A
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An aqueous solution of gas ‘A’ gave the following data (reactions): It decolourised an acidified KMnO_(4) solution.

An aqueous compound of an inorganic compound (X) shows the following reactions: a. it decolourises and acidified KMnO_(4) solution accompanied by the evolution of oxygen. b. it liberates I_(2) from an acidified KI solution. c. It gives a brown precipitate with alkaline KMnO_(4) solution with evolution of oxygen. d. It removes black stains from old oil paintings. Identify (X) and give chemical equtions for the reaction at steps (a) to (d).

Why can’t HCl acid be used to acidify KMnO_(4) solution ?

TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. When KMnO(4) is reduced with oxalic acid in acidic solution, the oxida...

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  2. The reaction of aqueous KMnO4 with H2 O2 in acidic conditions gives.

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  3. Name the gas that can readily decolourise acidified KMnO(4) solution:

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  4. The colour and magnetic nature of mangante ion (MnO(4)^(2-)) is

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  5. Solution of MnO(4)^(-) is purple-coloured due to :

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  6. Potassium permanganate is used.

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  7. Which of the following is Baeyer's reagent ?

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  8. Lanthanoids are

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  9. The atomic number of Gadolinium (Gd) is 64. The CORRECT electronic con...

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  10. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  11. Which of the following oxidation states is the most common among the l...

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  12. Which is the oxidation state generally found in lanthanides?

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  13. Which one of the following lanthanide ions does NOT exhibit paramagnet...

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  14. Which of the following lanthanoids ions is diamagnetic?

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  15. What is the general molecular formula of the products obtained on heat...

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  16. Reason of lanthanoid contraction is

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  17. In lanthanoids , atomic radius decreases as atomic no. increases becau...

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  18. The most basic hydroxide from the following is

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  19. Because of lanthnoid contraction, which of the following pairs of elem...

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  20. Which of the following pairs has the same size ?

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