How do I check the status of a free emeralds task?

To track the task status, click the three stripes in the upper-left corner of the window:

Then click Reward status:

There are three sections in this window:

• The Rewarded section shows the tasks you have already received the reward for. 
• The Pending section shows the tasks you are still doing.
• The Rejected section shows the tasks you cannot get a reward for since some conditions were not met.

Click the task to check the details of its progress. Here, you will find the date you started this task, its status, and the FAQ section: