First slide
Transition elements
Question

Select the correct statements

Moderate
Solution

 Correct (1) Cr2O72 is formed (fact). 

 Function of CO2 to make solution acidic duc to formation of H2CO3

(4) It is due to charge transfer i.e., momentary transfer of charge from O-atom to metal atom (i.e., Cr) thereby changing O2- ion momentarily to O ion and reducing the O.S. of Cr from +6 to +5.

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