a) In aq solutions - Zinc iodide(ZnI2) can be dissociated as - ZnI2 (s) + H2O (l) <--------> Zn+2 (Aq) + 2 I^- (Aq) But ZnI2 is slightly solube, hence maximum amount of ZnI2 (s) is remained in the solution. Therefore maor species in the solution are Zn+2 (Aq), I^- (Aq), ZnI2 (s) b) N2O gives nitrous acid when it dissolves in water. So major species are H+(aq), NO2^- (Aq), HNO2 (l) C) NaNO2 dissoled in water to give Na+ (aq) + NO2^- (aq) Here NO2^- reacts with water and gives HNO2 as the majore species., hence - The majore speies are - HNO2 (l), Na+(aq), OH- (aq) d) glcose completely dissolved in water and not produce any ions. Hence it doen\'t lost its identity.So the majore species are- C6H12O6 (Aq) e) In aq solutions - Nickel iodide(NiI2) can be dissociated as - NiI2 (s) + H2O (l) <--------> Ni+2 (Aq) + 2 I^- (Aq) But NiI2 is slightly solube, hence maximum amount of NiI2 (s) is remained in the solution. Therefore maor species in the solution are Ni+2 (Aq), I^- (Aq), NiI2 (s) Solution a) In aq solutions - Zinc iodide(ZnI2) can be dissociated as - ZnI2 (s) + H2O (l) <--------> Zn+2 (Aq) + 2 I^- (Aq) But ZnI2 is slightly solube, hence maximum amount of ZnI2 (s) is remained in the solution. Therefore maor species in the solution are Zn+2 (Aq), I^- (Aq), ZnI2 (s) b) N2O gives nitrous acid when it dissolves in water. So major species are H+(aq), NO2^- (Aq), HNO2 (l) C) NaNO2 dissoled in water to give Na+ (aq) + NO2^- (aq) Here NO2^- reacts with water and gives HNO2 as the majore species., hence - The majore speies are - HNO2 (l), Na+(aq), OH- (aq) d) glcose completely dissolved in water and not produce any ions. Hence it doen\'t lost its identity.So the majore species are- C6H12O6 (Aq) e) In aq solutions - Nickel iodide(NiI2) can be dissociated as - NiI2 (s) + H2O (l) <--------> Ni+2 (Aq) + 2 I^- (Aq) But NiI2 is slightly solube, hence maximum amount of NiI2 (s) is remained in the solution. Therefore maor species in the solution are Ni+2 (Aq), I^- (Aq), NiI2 (s).

1. a) In aq solutions -
Zinc iodide(ZnI2) can be dissociated as -
ZnI2 (s) + H2O (l) <--------> Zn+2 (Aq) + 2 I^- (Aq)
But ZnI2 is slightly solube, hence maximum amount of ZnI2 (s) is remained in the solution.
Therefore maor species in the solution are Zn+2 (Aq), I^- (Aq), ZnI2 (s)
b) N2O gives nitrous acid when it dissolves in water.
So major species are H+(aq), NO2^- (Aq), HNO2 (l)
C) NaNO2 dissoled in water to give Na+ (aq) + NO2^- (aq)
Here NO2^- reacts with water and gives HNO2 as the majore species., hence -
The majore speies are - HNO2 (l), Na+(aq), OH- (aq)
d) glcose completely dissolved in water and not produce any ions. Hence it doen't lost its
identity.So the majore species are- C6H12O6 (Aq)
e)
In aq solutions -
Nickel iodide(NiI2) can be dissociated as -
NiI2 (s) + H2O (l) <--------> Ni+2 (Aq) + 2 I^- (Aq)
But NiI2 is slightly solube, hence maximum amount of NiI2 (s) is remained in the solution.
Therefore maor species in the solution are Ni+2 (Aq), I^- (Aq), NiI2 (s)
Solution
a) In aq solutions -
Zinc iodide(ZnI2) can be dissociated as -
ZnI2 (s) + H2O (l) <--------> Zn+2 (Aq) + 2 I^- (Aq)
But ZnI2 is slightly solube, hence maximum amount of ZnI2 (s) is remained in the solution.
Therefore maor species in the solution are Zn+2 (Aq), I^- (Aq), ZnI2 (s)
b) N2O gives nitrous acid when it dissolves in water.
So major species are H+(aq), NO2^- (Aq), HNO2 (l)
C) NaNO2 dissoled in water to give Na+ (aq) + NO2^- (aq)
Here NO2^- reacts with water and gives HNO2 as the majore species., hence -
The majore speies are - HNO2 (l), Na+(aq), OH- (aq)
d) glcose completely dissolved in water and not produce any ions. Hence it doen't lost its
identity.So the majore species are- C6H12O6 (Aq)
e)
In aq solutions -

2. Nickel iodide(NiI2) can be dissociated as -
NiI2 (s) + H2O (l) <--------> Ni+2 (Aq) + 2 I^- (Aq)
But NiI2 is slightly solube, hence maximum amount of NiI2 (s) is remained in the solution.
Therefore maor species in the solution are Ni+2 (Aq), I^- (Aq), NiI2 (s)