A) \[B\]
B) \[Ca\]
C) \[In\]
D) \[Te\]
Correct Answer: D
Solution :
Like alkali metal (except\[Li\]), thalium (I) forms double salts with aluminium salts \[\underset{potash\text{ }alum}{\mathop{{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O}}\,\] \[\underset{thallus\text{ }alum}{\mathop{T{{l}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O}}\,\]
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