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CuFeS(2)+O(2)("excess")overset(Delta)toX...

`CuFeS_(2)+O_(2)("excess")overset(Delta)toX(s)+Y(s)`
Note: Corresponding sulphates of copper and iron are formed respectively.
which is correct chose for X and Y?

A

X liberates iodine from soluble iodides like Kl

B

Y on heating liberates `SO_(3)` only

C

X forms bluish white precipitate with sodium hydroxide which redissolves in excess of sodium hydroxide.

D

Y on reaction with potassium ferricyanide gives brown precipitate.

Text Solution

Verified by Experts

The correct Answer is:
A
`CuFeS_(2)+4O_(2)overset(Delta)toCuSO_(4)(s)+FeSO_(4)(s)` ltbr (B) `2FeSO_(4)overset(Delta)toFe_(2)O_(3)+SO_(2)+SO_(3)`
(C) `CuSO_(4)+2NaOHtoNa_(2)SO_(4)+Cu(OH)darr` (insoluble in excess NaOH)
(D) `Fe^(2+)+2K_(3)[Fe(CN)_(6)]toFe_(3)[Fe(CN)_(6)]_(2)` (deep blue)
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Only one option correct type
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  2. When K(4)[Fe(CN)(6)] is added to FeCl(3) , the complex compound formed...

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  3. FeCl(3).6H(2)O is actually:

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  4. Aqueous solution of which of the following ions is green?

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  5. Aqueous solution of (P) and (Q) are violet. (P) turns green on oxidati...

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  7. German silver is an alloy of copper and:

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  8. When copper is placed in the atmosphere for sufficient time, a green c...

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  9. FeCl(3) dissolves in

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  10. When AgNO(3)(aq) reacts with excess of iodine, we get:

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  12. The compound that gets oxidised even on exposure to atmosphere is:

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  13. The +3 ion of which one of the following has half filled 4f subshell?

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