Least stable hydride is : — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Group 14 hydrides are CH4, SiH4 (silane), GeH4 (germane), SnH4 (stannane), and PbH4 (plumbane). Step 2: Moving down the group, the atomic size of the central atom increases, leading to longer and weaker M-H bonds with lower bond dissociation energies. Step 3: Since Pb has the largest size in Group 14, the Pb-H bond is the weakest and most easily cleaved, making plumbane (PbH4) the least stable hydride (option c).