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FeCr2O4 + Na2CO3 + O2 to mention which ...

`FeCr_2O_4 + Na_2CO_3 + O_2 to ` mention which product is obtained?

A

`Na_2CrO_4 + Fe_3O_4 + CO_2`

B

`Na_2CrO_4 , Fe_2O_3 + CO_2`

C

`Na_2 Cr_2 O_7 + Fe_2O_3 + CO_2`

D

`Na_2 Cr_2O_7 + Fe_2O_3 + CO`

Text Solution

Verified by Experts

The correct Answer is:
B
`4FeCr_2 O_4 + 8Na_2CO_3 + 7O_2 to 2Fe_2O_3 + 8Na_2CrO_4 + 8CO_2`
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2K_(2)MnO_(4)+O_(3)+H_(2)O rarr 2KMnO_(4)+2KOH+O_(2) In the above reaction, O_(3) acts as oxdising agent and the oxidised product 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 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 :

MARVEL PUBLICATION-D AND F BLOCK ELEMENTS -TEST YOUR GRASP
  1. FeCr2O4 + Na2CO3 + O2 to mention which product is obtained?

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  2. The number of transition series in the periodic table are

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  3. What is the general electronic configuration of transition elements

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  4. Each transition series contains only 10 elements because

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  5. Which one of the following refers to configuration of transition elem...

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  6. The outer electronic configuration of chromium is

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  7. Which of the following does NOT show different oxidation states?

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  8. Calculate the oxidation number of Mn in KMnO(4) molecule.

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  9. The properties of transition metals are in between the properties of ...

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  10. Which transition metal shows the highest oxidation state ?

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  11. Which of the following would be diamagnetic?

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  12. The element present immediately below Zn in the periodic table in the ...

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  13. Oxidation state of +1 is possible with

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  14. For Sc (2 1), if both 3d and 4s electrons in involved in bonding, the ...

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  15. Which one of the following forms a colourless solution in aqueous medi...

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  16. Which of the following group belongs to transition series ?

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  17. In transition elements, the differentiating electron enters into subs...

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  18. Which of has the highest number of unpaired electrons?

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  19. The range of wavelength of the visible light is

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  20. Which of the following salt give coloured aqueous solution ?

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  21. Sulphide ore of Zinc is

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