not possible to create multiple Vswitch with a single physical network adaptor. if you want to use multiple VLANs, then create multiple port group on the same vSwitch and tag the VLANs for each of the port group.
make sure your uplink has been configured as a trunk port
NO, that is not possible. You can add multiple NIC to one vSwitch but can't add one nic to multiple switches.
As already suggested below you can add multiple "VM port group" in the vSwitch which has NIC and use vlan for those.
One NIC is minimum requirement for vKernel port group for management network. Now as you have only one NIC so VM port group(s) will reside on the same vSwitchCheers Rajeev
VCP6-DCV, VTSP-SV, VSP-SV, MCSE, CCNA