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Iron (+II) is one of the most important ...

Iron (+II) is one of the most important oxidation states and salts are called ferrous salts. Most of the `Fe(+II)` salts are pale green and contain `[Fe(H_(2)O)_(6_]^(2+)` ion. Fe(+II) compounds are easily oxidised by air and so are difficult to obtain pure `Fe^(2+)` form many complexes like `K_(4)[Fe(CN)_(6)]`.
Q. Anhydrous `FeCl_(2)` is made by :

A

heating Fe with dilute HCl

B

heating Fe with gaseous HCl

C

reacting Fe with conc. HCl

D

heating Fe with `Cl_(2)` gas

Text Solution

Verified by Experts

The correct Answer is:
B
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Iron (+II) is one of the most important oxidation states and salts are called ferrous salts. Most of the Fe(+II) salts are pale green and contain [Fe(H_(2)O)_(6_]^(2+) ion. Fe(+II) compounds are easily oxidised by air and so are difficult to obtain pure Fe^(2+) form many complexes like K_(4)[Fe(CN)_(6)]. Q. K_(3)[Fe(CN)_(6)] is used in the detection of Fe^(2+) ion with which it gives a deep blue colour. This colour is due to the formation of :

Iron (+II) is one of the most important oxidation states and salts are called ferrous salts. Most of the Fe(+II) salts are pale green and contain [Fe(H_(2)O)_(6_]^(2+) ion. Fe(+II) compounds are easily oxidised by air and so are difficult to obtain pure Fe^(2+) form many complexes like K_(4)[Fe(CN)_(6)] . Q. FeSO_(4) is used in brown ring test for nitrates and nitrites. In this test, a freshly prepared FeSO_(4) solution is mixed with solution containing NO_(2)^(-) or NO_(3)^(-) and the conc. H_(2)SO_(4) is run down the side of the test tube. It the mixture gets hot or is shaken. (I) the brown colour disappear (II)NO is evolved (III) a yellow solution in Fe_(2)(SO_(4))_(3) is formed

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[Fe(CN)_(6)]^(4-) and [Fe(H_(2)O)_(6)]^(2+) are of different colours in dilute solutions why?

[Fe(CN)_(6)]^(4-) and [Fe(H_(2)O)_(6)]^(2+) are of different colours in dilute solutions why?

Turnbull's blue is formed when Fe^(+2) ions are added to K_(3)[Fe(CN)_(6)] Turnbull's blue is

What is the value of spin only magnetic moment of anionic and cationic part of complex [Fe(H_(2)O)_(6)]_(2) [Fe(CN)_(6)]

What is the value of spin only magnetic moment of anionic and cationic part of complex [Fe(H_(2)O)_(6)]_(2) [Fe(CN)_(6)]

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