A student breathes in and out through the tube P in the apparatus illustrated (i) Name a liquid in the test tubes, which would detect a difference in composition between inhaled and exhaled air. (ii) After a minute or two of breathing, how would the liquids in tubes A and B differ in appearance?

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.  

b.false that your answer