Select all correct statements about sodium nitroprusside Na2[Fe(CN)5NO] as a reagent (take NO as NO+).

Iron is in the +2 oxidation state.

It gives a purple-violet colour with sulphide ions in alkaline solution.

Iron is in the +2 oxidation state.

It gives a purple-violet colour with sulphide ions in alkaline solution.

It gives an immediate purple-violet colour with thiosulphate ions.

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3qa162

Select all correct statements about sodium nitroprusside $Na X_{2} [Fe (CN) X_{5} NO]$ as a reagent (take NO as $NO X^{+}$ ).

x - 5 + 1 = - 2

gives Fe(+2),

d^{6}

low spin, with no unpaired electrons. Sulphide gives the purple

[Fe (CN) X_{5} NOS] X^{4 -}

. Thiosulphate does not give this colour directly, so the last statement is false.