In some areas it's illegal and in othres it is legal
Sorry, there is no one answer, since there are thousand of different rules in place in different cities. You would need to check with the authorities in YOUR city.
yes you can
Is it illegal to shoot a pellet gun in the City Limits of Quincy IL>
NO!
Contact your local police for current and correct information.
It would help if you stated what city you are asking about.
It is my understanding you can shoot an air gun in the backyard in the County of Sacramento (I don't know about the City of Sacramento) providing the pellet does not travel past your premises onto a neighboring property. If the pellet gun is loud, there might be some issues relating to noise ordinance... usually after or before certain hours. The only laws on the books in Sacramento County specify issues regarding to shooting in or within 150 yards of a public park... which is not allowed.
The way the law reads is, "It's illegal to launch a projectile of any type with in the city limits. Pellet gun, slingshot, bow and arrow, etc, etc.
no
The answer will depend on the city and the local and state law.
no
no
yes