7&8&9&10 please its my last question

7. Which of the following factors explains why H2O is a polar molecule? a. an asymmetrical distribution of charge b. the presence of two non-bonding pairs of electrons c. the presence of two bonding pairs of electrons d. the presence of two hydrogen atoms 8. For which of the following molecules is sp2 the correct hybridization? a. CH4 b. BF3 c. BeCl2 d. CCl4 9. What is the correct shape of a molecule that demonstrates y2 hybridization? a. bent b. trigonal planar c. linear d. tetrahedral 10. The magnitude of London dispersion forees is proportional to which of the following? a. number of double covalent bonds b. ionic bonding c. molecular mass of participating molecules d. number of single covalent bonds