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What is the formula of chocolate coloure...


What is the formula of chocolate coloured ppt ?

A

`Fe_(4)[Fe(CN)_(6)]`

B

`Cu_(2)[Fe(CN)_(6)]`

C

`Cu_(4)[Fe(CN)_(6)]`

D

`Cu(CN)_(2)`

Text Solution

Verified by Experts

The correct Answer is:
b
i`CuSO_(4) + BaCI_(2) rarr BaSO_(4) darr + 2HCI`
`ii 2CuSO_(4)+4KI to 2K_(2)SO_(4)+underset("white ppt.")(CuI_(2)+I_(2)darr`
`I_(2)+2Na_(2)S_(2)O_(3)to 2NaI+Na_(2)S_(4)O_(6)`
`(iii) 2Cu^(2+)+K_(4)[Fe(CN)_(6)]to underset("ppt.")underset("(chocolate)")underset("Red-brown")`
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