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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-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-2 (PRMANGANATE AND DICHROMATE)
  1. Acedified K2Cr2O7 cannot oxidise

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  2. Number of electrons transferred in each case when KMnO(4) acts as an o...

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  3. KMnO(4) is powerful oxidant where it converts into

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  4. Four moles of KMnO(4) reacts with excess of hypo solution to produce -...

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  5. An acidified solution of KMnO(4) oxidises

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  6. Incorrect statement regarding the structure of dichromate is

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  7. Reaction of KMnO4 in neutral or very weakly acidic solution can be rep...

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  8. K2Cr2O7 cannot be used for

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

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

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

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  12. In the dichromate dianion

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

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  14. Which of the following oxides of chromium is amphoteric in nature

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

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  16. When KMnO4 is added to oxalic acid, the decolourisation is slow in the...

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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. When MnO(2) is fused with KOH in the presence of air, a coloured compo...

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