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A compound of iron exists as a dimer in ...

A compound of iron exists as a dimer in vapour state. It is hygroscopic in nature and disolves in water giving brown acidic solution. The compound is

A

`Fe_(3)O_(4)`

B

`FeSO_(4)`

C

`FeCl_(3)`

D

`FeCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
(3) `FeCl_(3)` exist as `Fe_(2)Cl_(6)` (a dimer) in vapour state. The solution is acidic due to the formation of HCl and brown due to the formation of ` Fe(OH)_(3)`.
`FeCl_(3)+3H_(2)OtoFe(OH)_(3)("brown")+3HCl`
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Additional Problems for Self practice (APSP)
  1. The pair of the compounds in which both the metals are in the highest ...

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  2. Among the following statements, the incorrect one is :

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  3. A compound of iron exists as a dimer in vapour state. It is hygroscopi...

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  4. Iron is rendered passive by treatment with concentrated

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  5. Which one of the following dissolves in hot concentrated NaOH?

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  6. how copper wire reacts with oxygen to produce:

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  7. A compound is yellow when hot and white when cold. The compound is:

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  8. At 3000^(@)C FeCl(3):

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  9. When FeSO(4) is strongoly heated, the number of acidic gases produced ...

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  10. On heating ZnCl(2).2H(2)O, the compounds obtained is:

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  11. On heating KMnO(4), one among the following is not formed:

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  12. Reaction of KMnO(4) in neutral or very weakly alkaline solution can be...

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  13. KMnO(4) in excess on treatment with concentrated H(2)SO(4) forms a com...

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  14. Which of the following statement wrong?

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  15. The image on an exposed and developed photographic film is due to

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  16. The yellow colour solution of Na(2)CrO(4) changes to orange red on pas...

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  17. What happens when a molten mixture of K(2)FeO(4) and K(2)CrO(4) is aci...

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  18. Why silver chloride is used I photochromic spectacles?

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  19. In which of the following reactions, reaction of silver with the given...

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  20. Which of the following can be employed for the conversion of potassium...

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