Sockets & plugs
Mongolia uses 230V, 50Hz with sockets and plugs Type C and Type E.
Type C
Type E
Adapters and transformers
Adapter required, transformer not needed
Sockets & plugs
Some sockets/plugs in Mongolia are the same as in India while for others you will need an adapter.
Frequency
Frequency is the same in Mongolia and India (50 Hz) so there shouldn't be any problems.
Voltage
Mongolia also uses 230V as India so you don't need a converter/transformer to convert a voltage as it's the same.