Multiple choice

Among the following the more stable complexes of thalium is/are

P. Tl(OH) Q. TlCl3 R. TlBr S. TlN3

  1. P only

  2. Q only

  3. R only

  4. P and Q

  5. Q and R
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thallium tends to oxidize to the +3 and +1 oxidation states as ionic salts. The +3 state resembles that of the other elements in thallium's group (boron, aluminum, gallium, indium). Thallium represents +1 oxidation state due to the inert pair effect. Hence, Tl(OH) and TlBr are more stable complexes than TlN3 and TlCl3.

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