Here are the correct Answers in reverse order of questions. Sorry for giving some extra detail about each one. Stay tuned for next round in two weeks.
12) Serial based on business tycoon's family feud was Khandan - The Dhirubhai Ambani of the story was Shriram Lagoo (Not Girish Karnad).
11) A Romantic Serial and very popular ' Phir wohi talaash' supporting cast includes Neelima Azim, Dr Ashwin kumar & SM Zaheer , The main heroine was very popular among guys but never seen her again.Theme song was a nice ghazal. It's directed by Lekh Tandon who directed movies like Shammi's Professor, Jhuk Gaya Asman etc and also acted as Maqsood Bhai sweeper in Munna Bhai MBBS & Librarian in Lage Raho Munna Bhai.
10) Serial was 'Talaash'. Hemant Kumar was the Music director for the title song of Hrishikesh Mukherjee's tele-serial "Talaash" starring Moushmi Chatterjee and Alok Nath. The song, sung by Suresh Wadkar, "Jeevan ek talaash hai", had the same tune as "Tum pukaar lo" from Khamoshi (Old) from the same music director.
9) Lifeline - Jeevanrekha was directed by famous stage personality and director Vijaya Mehta and her son Deven Khote.
8) Story of an lady IPS officer is 'Udaan' - So called Kiran Bedi played by Kavita Chaudhary
7) Hema Malini's first TV serial was Terah Panne (Not Nupur)
6) Serial - 'Subah' based on college life, drugs, music by RD
5) The serial name was 'Chunauti' - - her pal jeevan ka ek chunauti hai. Beutifully sung by Amit kumar. Another very popular serial among the college lads.
4) 'Yeh Jo hai Zindagi' with famous lines 'Satish shah's 30 year ka experience and Tiku talsania's 'Yeh kya ho raha hai'
3) Wakai kaafi bada hai - OK nahane ka bada saboon. It was OK Soap (not lyril or lifebouy or Rin)
2) This one was little tricky, It's a family planning ad for Nirodh. I am sure everybody on this forum is 18+ so no harm in asking this one (Though I was not 18 when watching this one) The lines were as follows. Later I (mis)used it in all my skits in college as a punchline.
Pehle mai jaldi kar di na.. ab doosare ke liye thoda sabra kar.
'Dekho beta yeh tau kudrat ki baat hai, podhe ho ya bachchhe, faasla nahi hoga tau panpenge kaise'
1) Correct, animated story 'Hind desh ke wasi, hum sab ek hai.
The Funny lines in my skit is taken from here;
Yeh anek kya hota hai didi,
abhi batati hu...
Ek Juta, anek jute
Ek chappal, Anek chappale ....
Anek Ungliya, Ban gayi mutthi, ban gayi taaqat
Maine kaha munna paach-2 ladkiyo se pit kar aaya hai (Dabar Chyawanprash)
kaun paanch, chorus: Bela gulab juhi champa chameli.......