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Which of the following gases turns the a...

Which of the following gases turns the acdified potassium dischromate paper green

A

`HCl `

B

`H_2S`

C

`CO_2`

D

`SO_2`

Text Solution

Verified by Experts

The correct Answer is:
B, D
`H_2S and SO_2` are reducing agents which reduce `underset(("Orange")) (Cr_2O_7^(2-)) " to " underset(("Green"))(Cr^(3+))`.
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ERRORLESS-THE d-AND f- BLOCK ELEMENTS -NCERT BASED QUESTIONS (Compounds of Transitional Elements)
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  4. Which of the following is formed when CO(2) gas is passed through an a...

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  5. Acidified solution of chromic acid on treatment with hydrogen peroxide...

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  6. In aqueous solution Cr^(2+) is stronger reducing agent than Fe^(2+). T...

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  7. The correct order of increasing oxidising power in the series is

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  8. The correct formula of permaganic acid is

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  9. Why Mn^(2+) compounds are more stable than Fe^(2+) compounds towards o...

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  10. Potassium permanganate acts as an oxidant in neutral, alkaline as well...

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  11. Which of the oxide of manganese is amohoteric

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  12. MnO(4)^(-) reacts with Br^(-) in alkaline pH to give

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  13. Which of the following statement is incorrect for KMnO4

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  14. Mn^(2+) can be converted into Mn^(7+) by reacting with

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  15. Formula of thiosulphate, manganate and arsenate respectively are

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  17. When a brown compound of Mn (A) is teated with HCl, it gives a gas (B)...

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  18. On addition of small amoung of KMnO(4) to concentrated H(2)SO(4), a gr...

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  19. When KMnO(4) solution is added to oxalic acid solution , the decolouri...

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  20. KMnO(4) acts as an oxidising agent in acidic medium. The number of mol...

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