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A blue colouration is not obtained when...

A blue colouration is not obtained when

A

Ammonium hydroxide dissolves in copper sulphate

B

copper sulphate solution reacts with `K_(4) [Fe (CN)_(6)]`

C

Ferric chloride reacts with sodium ferrocyanide

D

Anhydrous `CuSO_(4)` is dissolved in water

Text Solution

Verified by Experts

The correct Answer is:
B
`CuSO_(4) + K_(4) [Fe(CN)_(6)] rarr `no reaction
`4NH_(4)OH +CuSO_(4) rarr underset("Deep blue")([Cu(NH_(3))_(4)]SO_(4)) + 4H_(2)O`
`underset("Anhydrous")(CuSO_(4)) +5H_(2)O rarr underset(Blue)(CuSO_(4)).5H_(2)O`
`4FeCI_(3) +3Na[Fe(CN)_(6)] rarr underset(("Prussian blue"))underset("Ferric ferrocyanide")(Fe_(4)[Fe(CN)_(6)]+12 NaCI)`
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A2Z-THE D AND F BLOCK ELEMENTS-Section D - Chapter End Test
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  2. Verdigris is

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  3. Light green crystals of ferrous sulphate lose water molecules and turn...

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  4. Among TiF(6)^(2-), CoF(6)^(3-), Cu(2)C1(2) and NiC1(4)^(2-) (At. No. T...

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  5. Potassium permanganate works as oxidising agent both in acidic and bas...

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  6. Which method of parification is represented by the following equation...

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  7. Which of the following sulphides when heated strongly in air gives the...

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  8. Guignet's green is known as

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  9. Excess of KI reacts with CuSO(4) solution and Na(2)SO(3) solution is a...

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  10. When concentrated sulphuric acid is added slowly to a solution of ferr...

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  11. Railway wagon axles are made by heating rods of iron embedded in charc...

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  12. A blue colouration is not obtained when

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  13. General configuration of outermost and penultimate shell is (n - 1) s^...

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  14. KMnO(4) reacts with ferrous ammonium sulphate according to the equatio...

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  15. In nitroprusside ion, the iron and NO exist as Fe(II) and NO^(+) rathe...

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  16. The number of mole of KMnO(4) that will be needed to react completely ...

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  17. Out of the all known elements, the percentage of transitional elements...

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  18. Assetion : Permanganate titrations is not carried out in presence of h...

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  19. Assertion : FeI(3), CuI(2), PbI(4) do not exist but FeF(3), CuF(2), Pb...

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  20. Assertion : CuSO(4).5H(2)O on heating to 250^(@)C losses all the five ...

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