Welcome to the upgraded REB e-learning. This is not a new platform. It has just been upgraded. You will be able to find your courses and other materials, but only organized differently. For any support, you may call the following number 0788734348

Chemistry: Oxygen and its properties

Quiz of Chemistry

Opened: Sunday, 20 June 2021, 12:00 PM

Closed: Sunday, 20 June 2021, 2:00 PM

Time limit: 2 hours

Grading method: Highest grade

Grade to pass: 25.00 out of 50.00