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FeCr(2)O(4)+Na(2)CO(3)+O(2) to Fe(2)O(3)...

`FeCr_(2)O_(4)+Na_(2)CO_(3)+O_(2) to Fe_(2)O_(3)darr+Na_(2)CrO_(4)`

A

For disproportionation reaction.

B

For comproportionation reaction.

C

For either intermolecular redox reaction or displacement reaction

D

For either thermal combination redox reaction or thermal decomposition redox reaction.

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The correct Answer is:
c
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Na_(2)CO_(3)+PbSO_(4) to PbCO_(3) darr+Na_(2)SO_(4)

Potassium dichromate (K_(2)Cr_(2)O_(7)) is an orange coloured compound , very frequently used in laboratory as an oxidising agent as well as in a redox titration. It is generally prepared from chromite (FeCr_(2)O_(4)) ore according to the following reactions: (1) Fusion of chromite ore with sodium carbonate in excess of air. FeCr_(2)O_(4) + Na_(2)CO_(3) + O_(2) rarr Na_(2)CrO_(4)+Fe_(2)O_(3) +CO_(2) (2) Acidifing filtered sodium chromate solution with sulphuric acid. Na_(2)CrO_(4) + H_(2)SO_(4) rarr Na_(2)Cr_(2)O_(7) + Na_(2)SO_(4) + H_(2)O (3) Treating sodium dichormate with potassium choride . Na_(2)Cr_(2)O_(7) + KCl rarr K_(2)Cr_(2)O_(7) + NaCl If the number of moles of reactant available for reaction are : [FeCr_(2)O_(4)=0.25 "moles" , O_(2)=0.35 "moles", Na_(2)CO_(3)=0.60 "moles", H_(2)SO_(4)=0.2 "moles", KCl=0.4 "moles"] , then the maximum number of moles of K_(2)Cr_(2)O_(7) , that can be produced is :

Potassium dichromate (K_(2)Cr_(2)O_(7)) is an orange coloured compound , very frequently used in laboratory as an oxidising agent as well as in a redox titration. It is generally prepared from chromite (FeCr_(2)O_(4)) ore according to the following reactions: (1) Fusion of chromite ore with sodium carbonate in excess of air. FeCr_(2)O_(4) + Na_(2)CO_(3) + O_(2) rarr Na_(2)CrO_(4)+Fe_(2)O_(3) +CO_(2) (2) Acidifing filtered sodium chromate solution with sulphuric acid. Na_(2)CrO_(4) + H_(2)SO_(4) rarr Na_(2)Cr_(2)O_(7) + Na_(2)SO_(4) + H_(2)O (3) Treating sodium dichormate with potassium choride . Na_(2)Cr_(2)O_(7) + KCl rarr K_(2)Cr_(2)O_(7) + NaCl If whole of the chormite ore given in the previous question gets consumed and sufficient amount of rest of the reactants are given, then the mass of K_(2)Cr_(2)O_(7) obtained is:

Potassium dichromate (K_(2)Cr_(2)O_(7)) is an orange coloured compound , very frequently used in laboratory as an oxidising agent as well as in a redox titration. It is generally prepared from chromite (FeCr_(2)O_(4)) ore according to the following reactions: (1) Fusion of chromite ore with sodium carbonate in excess of air. FeCr_(2)O_(4) + Na_(2)CO_(3) + O_(2) rarr Na_(2)CrO_(4)+Fe_(2)O_(3) +CO_(2) (2) Acidifing filtered sodium chromate solution with sulphuric acid. Na_(2)CrO_(4) + H_(2)SO_(4) rarr Na_(2)Cr_(2)O_(7) + Na_(2)SO_(4) + H_(2)O (3) Treating sodium dichormate with potassium choride . Na_(2)Cr_(2)O_(7) + KCl rarr K_(2)Cr_(2)O_(7) + NaCl If you are initially provided with 224 gm of pure chromite ore and 169.6 gm of sodium carbonate , the minimum volume of air required at 1 atm and 273 K to consume at least one of the reactant completely, if air contains 20% by volume of oxygen gas is :

BaSO_(4) darr+Na_(2)CO_(3) to BaCO_(3)darr+Na_(2)SO_(4)

VK JAISWAL-TYPES OF REACTIONS-SUBJECTIVE PROBLEMS
  1. FeCr(2)O(4)+Na(2)CO(3)+O(2) to Fe(2)O(3)darr+Na(2)CrO(4)

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  2. Find total number of reagnets which cann produce I(2) from KI solution...

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  3. Find total number of metal cations which are ppted as metal sulphide o...

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  4. Consider the following reaction P(4)+KOH to PH(3)+X How many P-H bon...

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  5. Which of the following species/reagent can reduce Fe^(3+)(aq.) into Fe...

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  6. Find out number ionic compound(s0 which is/are water insoluble at room...

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  7. Find the value of expression |x-| for following compounds. where, ...

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  8. Find out total number of coloured compound(s) from following: BaCO(3...

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  9. Find out total number of cation(s) that produce precipitate with aqueo...

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  10. P(4)+SOCl(2) overset(Delta)toProducts Find out total number of non-p...

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  11. What is average oxidation state state of sulphur in product formed in ...

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  12. find out total number of coloured/black water insoluble compound(s) fr...

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  13. Find out total number of compounds which on heating undergo redox reac...

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  14. How many following Ammonium salts will evolve N(2) gas on heating? (...

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  15. How many following metals evolve NO (Nitric oxide) gas with dil. HNO(3...

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  16. Find number of basic radicals among the following cations, which can f...

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  17. Calculate difference between oxidation state of chromium (Cr) in blue ...

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  18. If hydrolysis of interhalogen compound can be represented by following...

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  19. Total number of species that can be oxidzed by acidic permanganate ion...

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  20. How many following metals evolve N(2)O gas with dil. HNO(3) (20%) Cr...

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  21. How many following ammonium salts will evolve NH(3) gas on heating? ...

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