The ORR simulator is the only application that allows you to acquire the skill of quickly selecting reagents and products of redox reactions, tested by task 29 of the Unified State Exam (in Russia).

The application assumes a basic knowledge of the topic sufficient to identify the possible oxidizing agent and reducing agent.

A convenient input interface and quick solution check will help you remember numerous possible variations of the task, which will save time on real testing.

To compile the database, we used tasks found in the Unified State Exam KIMs of previous years, as well as possible versions of the task compiled by Unified State Exam experts.