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AP EAMCET · Chemistry · Hydrogen

The correct order of acidic character of the following is:

  1. A H2O>H2 S>H2Se>H2Te
  2. B H2Se>H2 S>H2O>H2Te
  3. C H2Te>H2Se>H2 S>H2O
  4. D H2Te>H2 S>H2Se>H2O
Verified Solution

Answer & Solution

Correct Answer

(C) H2Te>H2Se>H2 S>H2O

Step-by-step Solution

Detailed explanation

The acidity is directly proportional to the tendency of the hydrogen donor. It depends upon the bond dissociation enthalpy of the X-H bond where X is Te,Se,S & O. Down the group the bond dissociation energy of hydrides decreases and the acidic strength increases.…