Compatibility summary
You will need a travel adapter in Palestine; plug types used there differ from Singapore.
Plug comparison
Singapore plug types: G
Palestine plug types: C H
There is no common plug type between Singapore (G) and Palestine (C H). You need a travel adapter.
Voltage comparison
Singapore: 230V, 50Hz
Palestine: 230V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.