Addition of Tl1+ ion to the solution had no apparent effect (all ions remained in solution), but addition of Ba2+ ion resulted in a precipitate. Which anion is present?

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answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

what does the table look like

where are the choice options?