Identify the correct order of acidity of hydrides of 16$^{th}$ group elements from the following.

Question

Given below are two statements :
Statement I: The boiling point of hydrides of Group 16 elements follow the order
H₂O > H₂Te > H₂Se > H₂S.
Statement II: On the basis of molecular mass, H₂O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H₂O, it has higher boiling point.
In the light of the above statements, choose the correct answer from the options given below :

Answer 1

Step 1: Understanding the Question:
The question asks for the trend in acidic strength for the hydrides of the oxygen family (Group 16).
Step 2: Detailed Explanation:
1. Acidic strength depends on the ease with which a hydride can release a proton ($H^+$ ion).
2. As we go down the group from O to Te, the atomic size increases.
3. Consequently, the $H-E$ bond (where $E$ is the group 16 element) becomes longer and weaker.
4. The bond dissociation enthalpy decreases down the group.
5. Therefore, $H_2Te$ releases protons more easily than $H_2O$.
6. The correct order of acidic strength is: $H_2O<H_2S<H_2Se<H_2Te$.
Step 4: Final Answer:
The correct increasing order of acidity is $H_2Te>H_2Se>H_2S>H_2O$.

Identify the correct order of acidity of hydrides of 16$^{th}$ group elements from the following.

Show Hint

The Correct Option is C

Solution and Explanation

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