How do I change to a cloned hard drive?

I'm cloning my hard drive onto another one, but I'm not exactly sure what the process is for setting the cloned one as my No1 drive. My old one is on its last legs and I'd rather use it for my less important things. What will happen when I disconnect my old one from my computer and only have the new one on it?

Will everything be literally the exact same on the new one? Same partition names and everything? And if so, can I then reconnect my old one and use its 2 partitions just like normal in addition to the 2 new cloned ones in My Computer? And won't those partition names conflict?

Any help on what I should do for this transition would be greatly appreciated, thanks

If cloning goes OK you will have exact copy of old hdd on a new one.
Then you can disconnect an old drive from the mobo and the system will boot from the new drive.

Make sure you disconnect the old drive before you boot to the cloned drive the first time.

If you desire to reconnect it, make sure the BIOS boot order has the cloned drive first.

Thanks all for the replies, I appreciate it :)