Neet Solved Paper 2013 Question 23
Question: Identify the correct order of solubility in aqueous medium.
Options:
A) $ CuS,\text{},Zn,\text{},N{a_2}S $
B) $ ZnS,\text{},N{a_2}S\text{},CuS $
C) $ ,N{a_2}S\text{},CuS,ZnS $
D) $ ,N{a_2}S\text{},ZnS,\text{},CuS $
Show Answer
Answer:
Correct Answer: D
Solution:
- Ionic compounds are more soluble in water or in aqueous medium. Ionic character $ \propto $ size of cation (if anion is same) The order of size of cation is $ N{a^{+}}>Z{n^{2+}}>C{u^{2+}} $
$ \therefore $ The order of ionic character and hence, of solubility in water is as $ Na _2S>ZnS>CuS $
