BBA

Placements (in INR; as provided by college)
Minimum Salary (Annual): 2.2 Lakh
Maximum Salary (Annual): 5.4 Lakh
Companies where students got placed
Air Asia GMR HP IndiGo Airlines Jet Airways Make My Trip Qatar Airways sotc Travel Guru Wipro
https://www.shiksha.com/bba/course/bba-in-aviation-and-logistics-management-sjes-college-of-management-studies-microsoft-it-academy-old-madras-road-bangalore-233850

This question has no meaning considering IIMs have 100 percent placements (except newly opened IIMs) and 80 percent of the CAT applicants and IIM students are from engineering background. There is no question of good or bad job, how will you define that?

It is difficult to get a job as a fresher on completion of BBA. You may able to get a job in UAE once you gain few years of experience after BBA in a supervisory role.

Yes, you can. You will have to appear for CAT open test & based on your score opt out for admission in MBA.

You can go ahead with this college:
There are a number of job opportunities after BBA in Aviation like:
Customer Service Management
Customer Relationship Management
Passenger Reservations & Ticketing
Revenue Management
Airline Sales & Marketing
Flight/Data Analysis
Loyalty Programs Management
Fueling Management

Hi,
List of colleges:
Chandigarh Business School of Administration, CBSA
Chandigarh University | Chandigarh
Lovely Professional University, Admission Office | Chandigarh
Chitkara University, Chandigarh | Chandigarh
https://www.shiksha.com/bba/colleges/bba-colleges-india?uaf[]=location&ts=5596882&rf=filters&ct[]=12292

B.Tech + MBA is a better option in comparison to BBA-MBA because as an engineer, you will be eligible for techno-managerial jobs in addition to pure non-technical managerial jobs. Most of the large business enterprises including MNC prefer MBA who have engineering background because their superior numerical ability and analytical skills.

Yes, Chennai has some good colleges:
Madras Christian College| Chennai
SRM University, Chennai - Kattankulathur Campus| Chennai
Ethiraj College for Women (Ethiraj)| Chennai
https://www.shiksha.com/bba/ranking/top-bba-colleges-in-chennai/93-2-0-64-0

Go as per your interest.
But yes, MBA in Finance or Marketing is very good.
Chooses either of them as both have good job opportunities.