A) Two types of ions
B) Only one type of ion
C) Four types of ions
D) Three types of ions
Correct Answer: D
Solution :
Potash alum is a mixed salt of \[{{K}_{2}}S{{O}_{4}}\] and \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] and on dissolving, it gives all three ion \[A{{l}^{3+}},\,{{K}^{+}}\] and \[SO_{4}^{2-}\] of which it is made.
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