The jb behind the fridge is as accessible as the receptacle behind the fridge.
If the "over the range" is a microwave, two single breakers are okay. If it's a hard-wired range hood, it brings to question 14-010(b). That rule has been applied so strictly at times that if the multi-wire branch circuit feeds lights AND plugs, a two-pole breaker is required. The actual rule contains an exception for fixed lighting loads OR non-split receptacles.
