Given the reaction at STP and at equilibrium: H2(g) + Cl2(g) → 2 HCl(9)
Which change will result in an increase in the
concentration of Cl2(g)?
A) decreasing the pressure of the system
B) decreasing the concentration of HCl(g)
C) increasing the concentration of H2(g)
D) increasing the concentration of HCl(9)

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.  

c (diamond),

sio2 (quartz)