Question Text
Question 2 :
$Mn^{2+}$ compounds are more stable than $Fe^{2+}$ compounds towards oxidation to their $+3$ state, because :
Question 3 :
The atomic number of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26 which one of these may be expected to have the highest second ionization enthalpy: 
Question 4 :
Assertion: The number of unpaired electrons in the following gaseous ions:<br>$Mn^{3+}, Cr^{3+}, V^{3+} $ and $Ti^{3+}$ are 4, 3, 2 and 1 respectively.
Reason: Among these Cr$^{3+}$ is most stable in aqueous solution.
Question 5 :
Assertion: $K_2PtCl_6$ is well-known compound whereas corresponding $Ni$ compound is not known.
Reason: $Pt^{+4}$ is thermodynamically more stable than $Ni^{+4}$.
Question 6 :
The equilibrium established when $HgCl_2$  is shaken with an excess of $Hg$ is: 
Question 7 :
Arrange the following species in the increasing order of their magnetic moment.<br/>$(I)\ VCl_3\ \ (II)\ \ VOSO_4\ \ (III)\ Na_3VO_4\ \ (IV)\ [V(H_2O)_6]SO_4. H_2O$<br/>
Question 9 :
Among the following pairs of ions, which pair has a lower oxidation state in aqueous solution more stable than the other?
Question 10 :
Statement 1 : A piece of zinc placed in a blue copper nitrate solution will displace the copper from the solution, producing copper metal and a colorless $\displaystyle { Zn }^{ 2+ }$ solution.<br/>Statement 2 : Copper is a much more active metal than zinc.
