The prussian blue colour obtained during the test of nitrogen by lassaigne's test is due to the formation of:

Options

A. iron (II) hexacyanoferrate (II)
B. iron (III) hexacyanoferrate (II)`
C. iron (III) hexacyanoferrate (III)
D. iron (II) hexacyanoferrate (III)

Answer

B

Explanation

`FeSO_(4)+2NaOHto`
`Fe(OH)darr+Na_(2)SO_(4)`
`Fe(OH)_(2)-+underset("From sodium extract")(6NaCN)to`
`underset(iron(iii) hexacyanoferrate(II))(Na_(4)[Fe(CN)_(6)]_(3)+12NaCl)`
Prussian blue colan.