Upvote:1
I don't know what IM5252e is supposed to be. It doesn't seem to correspond to any official Canadian document.
The actual document checklist provided by the High Commission of Canada in New Delhi, and applicable to residents of India, does not mention anything about previous employers, and only mentions education in the context of a student visa. You do need to include information about your current employer, such as pay slips, a NOC from your employer, etc.
Note that if you don't currently live in India, you should check Canada's immigration web site and enter the country in which you reside to get country-specific information.