Congrats
if there was any changes in your situation after getting the CSQYou must inform CIC
o change in marital status by reason of marriage, divorce, separation, annulment or death;
o death of applicant, dependent(s) or sponsor;
o birth of a child, pregnancy;
o if you have other children which you have not listed on your application form (whether or not they live with you);
o if your dependent children included on this application themselves have children which you have not listed on your application (whether or not these children live with you or your child);
o change in health;
o the laying of any criminal charges or conviction for a criminal offence;
o change in your mailing address / e-mail address and/or telephone number
Following the CIO AOR, your file will be forwarded to the visa office for processing. you will receive a request to undergo medical examinations about 6-8 months following the issuance of the CIO AOR. It is usually at this time that the visa office will also request additional documents, if necessary
Following the completion of the medicals, it takes another 2-6 months to receive the request for passports for visa issuance. It can take up to 6 weeks for passports to be returned to an applicant after they have been sent for visa stamping.
Do I need to get my educational qualifications verified again viz . My B.tech and MBA or its all done as part of CSQ
NO
b. Are there chances of Rejections in Federal Case after CSQ .
If yes, What are possible reasons .
Yes, many reason like failure at the medicals...
c. How Much Approx time it takes when you apply Federal Case after CSQ for an Indian National
It depends/ it differs case to case
The check list of the other forms and documents required:
http://www.cic.gc.ca/english/pdf/kits/forms/IMM5612E.pdf
Experts, correct me if I am wrong
Good luck