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Brown ring test is for...

Brown ring test is for

A

`NO_(3)^(-)`

B

`Cl^(-)`

C

I

D

`Br^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
`NO_(3)^(-)+H_(2)SO_(4) to HSO_(4)^(-) + HNO_(3)`
`6H_(2)SO_(4)+2HNO_(3)+3H_(2)SO_(4) to 3Fe(SO_(4))_(3)+4H_(2)O+2NO`
`[Fe(H_(2)O)_(6)]SO_(4). H_(2)O+NO to underset("Brown ring")([Fe(H_(2)O)_(5)(NO)]SO_(4))+2H_(2)O`
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Knowledge Check

  • FeSO_4 is used in brown ring test for nitrates and nitrites. In this test a freshly prepared FeSO_4 solution is mixed with eolution containing NO_(2)^(-) or NO_(3)^(-) and the conc. H_2SO_4 is run down the side of the tube. If the mixture gets hot is shaken I) The brown colour disappear II) No is evolved III) A yellow solution of Fe_(2)(SO_4)_3 is formed

    A
    I,II,III correct
    B
    I,III correct
    C
    II,III correct
    D
    Only I correct

  • The compound formed in the brown ring test has the formula [Fe(H_(2)O)_(5)NO]SO_(4) . The oxidation state of iron in it is

    A
    `+1`
    B
    `+2`
    C
    `+3`
    D
    zero

  • The compound formed in the brown ring test has the formula [Fe(H_(2)O)_(5) NO]SO_4 The oxidation state of iron in it is

    A
    `+1`
    B
    `+2`
    C
    `+3`
    D
    zero

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