You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <categorymembers gcmcontinue="File:Molecules-and-light-screenshot.png|" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2375" ns="0" title="Acharya Narendra Dev College" touched="2012-08-08T10:41:35Z" lastrevid="789741" counter="14443" length="32631" />
      <page pageid="74051" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving" touched="2010-12-13T22:02:36Z" lastrevid="468567" counter="2066" length="1865" />
      <page pageid="74057" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving/Electricity and Magnetism" touched="2010-12-13T22:02:36Z" lastrevid="468570" counter="1513" length="140" />
      <page pageid="74058" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving/Electromagnetic Waves and Optics" touched="2010-12-13T22:02:36Z" lastrevid="468571" counter="1572" length="140" />
      <page pageid="74055" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving/Mechanics" touched="2010-12-13T22:02:36Z" lastrevid="470822" counter="3162" length="3462" />
      <page pageid="74052" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving/Quantum Physics" touched="2010-12-13T22:02:36Z" lastrevid="468593" counter="1580" length="1145" />
      <page pageid="74056" ns="0" title="Acharya Narendra Dev College/Learning Physics through Problem Solving/Thermodynamics" touched="2010-12-13T22:02:36Z" lastrevid="468569" counter="1276" length="140" />
      <page pageid="9601" ns="0" title="AfroPhysics" touched="2010-01-07T10:18:22Z" lastrevid="471262" counter="11753" length="1303" />
      <page pageid="23393" ns="0" title="AfroPhysics/Project Planning/Uganda" touched="2010-05-24T06:31:51Z" lastrevid="471146" counter="5685" length="3930" />
      <page pageid="4248" ns="0" title="Energy Technology" touched="2011-02-11T03:01:33Z" lastrevid="657483" counter="7543" length="749" />
    </pages>
  </query>
</api>