Chlorine atom withdraws electrons by I effect as it is more electronegative than carbon atom. It donates electrons by resonance effect by donating electron pair by electromeric effect.
Ionic crystal is a class of crystal consisting of a lattice of ions held together by electrostatic interactions; they exhibit strong absorption of infrared radiation and have planes along which they cleave easily. crystal latticeA regular three-dimensional geometric arrangement of atoms, molecules, or ions in a crystal.Hope it's help
Plz mark it as a brainlist
Potassium and sodium because they are highly reactive metals and can react with air to produce flame. That's why they are kept under kerosene oil
B) – NO2