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 :

Options

A. 0.05 moles
B. 0.1 moles
C. 0.2 moles
D. 0.5 moles

Answer

C