Select atoms or molecules question type

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This question type allows you to design questions in which students select various atoms, molecules, bonds or other objects. The instructor builds molecules or reactions with the Marvin Sketch editor and selects certain objects as the answer. The student is then presented with the molecules or reactions and must select according to question text. Note: This plugin requires Marvin Applets from Chemaxon.

You can ask questions such as;

  • Select all chiral centers in the following molecule?
  • Select all sp3 hybrid atoms in the following structure?
  • Choose the nucleophile in the following reaction?
  • Select the reaction arrow which violates the rules of electron pushing?


This plugin adopts the same license that Moodle does. The Marvin Applets are free for academic purposes. Authors

This plugin was developed at the Indiana University of Pennsylvania (IUP). Neither IUP or Carl LeBlond are affiliated with Chemaxon.


This plugin requires Marvin Applets from Chemaxon which can be downloaded here. Download the full package and install it at your web servers root directory.


Example questions are provided as a Moodle xml file in the examples folder. (coming soon).