Question

(i) Write the resonance structure for CO₂. 

(ii) Draw Lewis structure of H₂SO₄. 

(iii) Why KHF₂ exist but KHCl₂ does not?

Answer 1

(i)

(ii) 

(iii) KF forms H-bonds with HF whereas KCI cannot form H-bond with HCL. Hence, KHF₂ can dissociate to give HF₂⁻ ion and therefore, KHF₂ exists. However, KHCI₂ cannot dissociate to HCI₂⁻ ion and therefore, KHCI₂ does not exist.