See image — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

# Solution: Maximum Acidic Compound **Step 1: Identify the trend** All compounds are hydrides of Group 16 elements ($H_2O, H_2S, H_2Se, H_2Te$). Acidity of hydrides increases down a group because bond strength decreases. **Step 2: Analyze bond strength** The $H$-$X$ bond strength decreases down the group: $$H-O > H-S > H-Se > H-Te$$ Weaker bonds are more easily broken to release $H^+$, increasing acidity. **Step 3: Compare acid strengths** $$H_2O \ll H_2S < H_2Se < H_2Te$$ The order of $pK_a$ values: $H_2O$ (~15.7) $> H_2S$ (~7) $> H_2Se$ (~3.9) $> H_2Te$ (~2.6) Lower $pK_a$ = stronger acid. $H_2Te$ has the lowest $pK_a$. **Answer: (D) $H_2Te$** — it is the maximum acidic compound because tellurium is the largest atom in Group 16, making the $H$-$Te$ bond weakest and most easily dissociated.