1) No, it is wrong. Khabarovsk is the administrative center of the Khabarovsk region.
2) No, it is wrong. The population of Vladivostok is more than 500 000.
3) No, it is wrong. Vladivostok was founded in the 19th century.
4) No, it is wrong. The ships make voyages everywhere.
5) No, it is wrong. Vladivostok has monsoon climate.
6) No, it is wrong. The city isn't densely built-up.