sblock Elements - Result Question 66

####19. Anhydrous MgCl2 is obtained by heating the hydrated salt with ……

(1980, 1M)

True/False

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Answer:

Correct Answer: 19. dry HCl

Solution:

  1. Both reactions in their complete format are written below

(i) In acidic medium,

[Fe2+(CN)6]4+H2212+2H+[Fe3+(CN)6]3+2H2O2

(ii) In alkaline medium,

[Fe3+(CN)6]3+H2O21+2OH[Fe2+(CN)6]4+O2+2H2O

Hence, H2O (for reaction (i)) and O2+H2O

(for reaction (ii)) are produced as by product.



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