MHT CET · Chemistry · Hydrogen
Identify the correct order of acidity of hydrides of \(16^{\text {th }}\) group elements from the following.
- A \(\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\)
- B \(\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}\)
- C \(\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{O}\)
- D \(\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{O}\)
Step-by-step Solution
Detailed explanation
Acidity increases down the group for hydrides due to decreasing bond strength and increasing size of the central atom. Order of acidity: \(\mathrm{H}_2 \mathrm{Te}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{O}\)
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