Q No. 2: Short Questions. /301) Why does ice floats on water?2) Differentiate between lone pair and bond pair of electrons.3) Why HCl has dipole-dipole forces of attraction?4) Why does a covalent bond become polar?5) What is octet rule?6) What is Lewis structure of diagram?7) What is meant by malleable and ductile property of metals?8)… Continue reading Previous paper class 9th(Chemistry)