MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The given compounds are hydrides of Group 16 elements. As we move down the group from oxygen to tellurium, the atomic size of the central atom increases. Due to the increase in atomic size, the bond length of the H-E bond (where E is O , S , Se , Te ) increases, which leads to a decrease in the bond dissociation enthalpy. A lower bond dissociation enthalpy means the H-E bond can be broken more easily to release an H ^+ ion. Therefore, the acidic character increases down the group. The order of acidic strength is H _2 O Thus, H _2 Te is the most acidic compound among the given options. Answer: H _2 Te