1.

Whichseries ofreactions correctlyrepresents chemicalreactionsrelatedto ironanditscompound ?

Answer»

`Fe overset (O_2, "heat ") toFe _ 3 O _ 4overset (CO,600^(@)C) toFeOoverset (CO, 700^(@)C) toFe `
`Feoverset ("dil." H_2SO_4) to FeSO_4 overset (H_2SO_4, O_2) to Fe _2 (SO_4)_ 3`
` Fe overset (O_2,"heat")to FeOoverset ("dil." H_2SO_4) toFeSO_ 4overset ("heat") to Fe`
`Fe overset (Cl_2, "heat")toFeCl_3 overset ("heat, AIR ") to FeCl_2 overset (Zn) toFe` .

Solution :Option(a) iscorrectsinceFe onheatingwith` O _ 2`GIVES` Fe_ 3O _4`which uponreduction with COfirst givesFeOandfinallyFe. All otheroptionsarewrongasexplained below:
Option(b) and(c )arewrongbecause` FeSO_4 `onheatinggives ` Fe_ 2 O_ 3 , SO_ 2and SO_ 3`andnot Fe.
`2 FeSO _ 4overset (DELTA ) toFe _ 2 O_3+SO_3+ SO_2`
Option(d) iswrongbecausein presenceofair,reductionof` FeCl_ 3`to` FECL _2`cannotoccur.


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