Misc: in which sport/game is the term 'love' used?

Questions

Why lead added to petrol?

Bangladesh became independent in 1971,what was it called before that date?

Who won the world professional snooker championship 15 times between 1927 and 1946?

Which jewish american singer became a born again christian in 1979?

Why is Goldbachs Conjecture not called a theory?