Describe a method to assess
how concentration effects rate
of reaction

An increase in the concentration/pressure leads to an increase in the number of collisions. This leads to an increased chance of successful collisions taking place which will increase the rate of the reaction.

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.