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K2Cr2O7 cannot be used for...

`K_2Cr_2O_7` cannot be used for

A

preparing azo compounds

B

tanning leather

C

as a laboratory oxidant

D

as a reductant

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The correct Answer is:
D
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Acedified K_2Cr_2O_7 cannot oxidise

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Why D_2O cannot be used as drinking water ?

(A) : To prepare aldehydes from primary alcohols , acidified KMnO_4 " or " K_(2) Cr_(2)O_7 is not used. (R) : Strong oxidising agents like acidified KMnO_(4) " or " K_(2)Cr_(2)O_(7) oxidise aldehydes to carboxylic acids .

(A) K_2Cr_2O_7 is used as primary standard in volumetric analysis. (R) It has a good solubility in water.

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AAKASH SERIES-REVISION EXERCISE -d-BLOCK ELEMENTS
  1. When KMnO4 is added to oxalic acid, the decolourisation is slow in the...

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  2. A solution of potassium chromate is treated with an excess of dilute n...

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  3. K2Cr2O7 cannot be used for

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  4. When acidified solution of potassium dichromate is shaken with aqueous...

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  5. The blue colour produced on adding hydrogen peroxide to acidified K2Cr...

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  6. Which of the following metals is known to form acidic oxide

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  7. In the dichromate dianion

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  8. The oxidation state of chromium in the final product formed by the rea...

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  9. Which of the following element has f electro nic configuration in its ...

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  10. The natures of the oxides CrO and CrO3, respectively

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  11. Acedified K2Cr2O7 cannot oxidise

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  12. The equilibrium Cr2O7^(2-) hArr 2CrO4^(2-)

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  13. The correct statement among the following is

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  14. Identify the correct statements among the following I) Both Cr and...

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  15. Which of the following has very high IP2 value

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  16. Zn, Cd and Hg are only 'd' block elements but not transition elements ...

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  17. Acidified KMnO4 oxidizes nitrites to

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  18. Permanganate ion oxidize S2O3^(2-) in fairly alkaline solutions to giv...

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  19. Which of the following ions is most para-magnetic

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  20. Yb^(+2) and Lu^(3+) are diamagnetic due to

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