I am a chemistry graduate from Nigeria with Bsc and Msc in chemistry. However, I have 8 years working experience in the banking industry. I want to ask that what are my chances of getting admission into an MBA programme in Canada, which business schools are likely to offer me admission considering my non-financial related background and what are my chances of finding a good paying job in the financial sector afterwards. Thank you

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With your experience and MSc you are highly likely to be admitted to an MBA in Canada. Admission chance will depend on the quality of the school and your GMAT score. You probably know that. Placement also varies between schools. The rankings normally show placement percentages. 

You don't necessarily need finance training in order to get into an MBA. You should have a certain level of overall quant skills, which you will demonstrate through the GMAT.

In terms of the post-degree career options, it's not out of the question to stay and work in the country. The visa rules are quite good for international grads. Finding a well-paying job, of course, is another matter. Stick to the schools that are ranked in the Financial Times: Ivey, McGill, Rotman (or potentially Queen's / UBC, in that range), and you'll have the best probability of achieving this goal. 

thank you!