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Which the following statements is wrong ...

Which the following statements is wrong ?

A

An acidified solution of `K_2Cr_2O_7` liberates iodine from iodides

B

In acidic solution dichromate ions are converted to chromate ions

C

Ammonium dichromate on heating undergoes exothermic decomposition to give `Cr_2O_3`

D

Potassium dichromate is used as titrant for `Fe^(+2)` ions

Text Solution

Verified by Experts

The correct Answer is:
B
`CrO_(4)^(-2) overset(pH=6)underset("pH=8")hArr Cr_2O_7^(-2)`
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Knowledge Check

  • Which of the following statements is wrong :

    A
    `A`. Hyper conjugation is the simultaneous shift of sigma and `pi` electrons at 1, 3-positions without the movement of any atom
    B
    `B`. Mesomeric effect is the delocalization of `pi` electrons with lone pair `pi` electrons in conjugation
    C
    `C`. Inductive effective is the permanent shifting of sigma electrons towards most electronegative atom
    D
    `D`. Tautomerism is shifting atoms at 1,3-positions without the shifting of `pi" and "pie^(-)`

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