UK Student visa - Visa process & documents

Are visa approvals for countries like the UK and Canada generally good or are they rejecting many applications?

Will the visa application be processed on time if biometrics and other formalities are completed by 15th August in UK?

Can I show my work experience in my startup without mentioning it is my own startup in UK?

Will my wife need to communicate in the local language for research or medical laboratory jobs abroad in UK/New Zealand?

If I complete a one-year study program and get a one-year stay back, can I extend my stay by enrolling in another course in UK/Canada?

How many times can I travel back to India on my student visa in UK/Australia?

What are the chances of staying back and getting a job in the UK after masters?

Will my passport expiry affect my university application or visa process in UK/Ireland?