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Na(2)CO(3)+Fe(2)O(3)rarr A+CO(2), what i...

`Na_(2)CO_(3)+Fe_(2)O_(3)rarr A+CO_(2)`, what is A in the reaction ?

A

`NaFeO_(2)`

B

`Na_(3)FeO_(3)`

C

`Fe_(3)O_(4)`

D

`Na_(2)FeO_(2)`

Text Solution

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The correct Answer is:
A
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A 2.0 g of mixture of Na_(2)CO_(3) and NaHCO_(3) loses 0.248 g when heated to 300^(@)C , the temperature at which NaHCO_(3) decomposes to Na_(2)CO_(3) , CO_(2) , the temperature at which NaHCO_(3) decomposes to Na_(2) CO_(3), CO_(3) and H_(2) O . What is the percentage of Na_(2) CO_(3) in mixture?

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Find Delta H_(f)^(@) of Fe_(2)O_(3)(s) if the standard heat reaction Fe_(2)O_(3)(s)+3CO(g)rarr 2Fe(s)+3CO_(2)(g) is -6.6 kcal. Given Delta H_(f)^(@)CO(g)=-26.4 kcal. Delta H_(f)^(@)CO_(2)(g)=-94 kcal .

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NARAYNA-S-BLOCK ELEMENTS-LEVEL-III
  1. The false statement among the following is:

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  2. When Na2CO(3) is added to an aqueous solution of CuSO(4)

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  3. K(2)CS(3) is called potassium -----------.

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  4. Which of the following does not exist?

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  5. The magnetic moment of KO(2) at room temperature is ---------- BM.

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  6. The reaction that takes place when CI(2) gas is passed through conc Na...

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  7. When sodium is added in scanty water, it catches fire. In this process...

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  8. Which of the following compounds on reaction with Na(2)O(2) gives yell...

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  9. Ease with which hydrides are formed form Li to Cs:

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  10. Na(2)CO(3^.)10H(2)O is an efflorescent salt. Under atmospheric conditi...

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  11. Li(2)SO(4) is not isomorphous with sodium sulphate:

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  12. Prefix 'alkali' for alkali metals denotes:

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  13. Na(2)CO(3)+Fe(2)O(3)rarr A+CO(2), what is A in the reaction ?

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  14. Trona is a natural hydrated mixed compound of sodium found in nature. ...

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  15. Washing soda on standing in air effloresced. How many water molecules ...

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  16. Calculate heat of solution of NaCI form the following data: Hydratio...

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  17. On heating 8 moles each of Li(2)CO(3) and K(2)CO(3), how many moles of...

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  18. How many moles of ammonia are produced, on hydrolysis of five moles of...

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  19. Rede the following statements and choose true (T) or false (F). (i) ...

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  20. The pair(s) of reagents that yield paramagnetic species is/are

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