Account for the following : The `E^@` value for the `Mn^(3+)|Mn^(2+)` couple is much more positive than that for `Cr^(3+)|Cr^(2+)` couple.

Account for the following: PCl_5 is more covalent than PCl_3 .

The questions given below consist of an Assertion and a Reason. Use the following key to choose the appropriate answer. If both assertion and reason are CORRECT and reason is the CORRECT explanation of the assertion. If both assertion and reason and CORRECT, but reason is NOT THE CORRECT explanation of the assertion. If assertion is CORRECT but reason is INCORRECT. If assertion is INCORRECT but reason is CORRECT. If both assertion and reason are INCORRECT. Assertion: E^@ for Mn^(3+)|Mn^(2+) is more positive than Cr^(3+)|Cr^(2+) . Reason: The third ionistation energy of Mn is larger that than of Cr.

What is the oxidation state of Cr in K_(2)Cr0_(3)

Give reason, Mn^(2+) ion is more paramagnetic than Fe^(2+) ion.

Give reason, Mn^(2+) ion is more paramagnetic than Fe^(2+) ion.

Explain the following observation giving an appropriate reason : Mn^(2+) is much more resistant than Fe^(2+) towards oxidation.

The oxidation state of Cr in [Cr(NH_3)_4Cl_2]^(+) is

Why E^(Theta) values for Mn, Ni and Zn are more negative than expected ?

Account for the following facts : The reduction of Cr_2O_3 with Al is thermodynamically feasible, yet it does not occur at room temperature.

Find the following squares by using the identities. (3mn+2n)^2