Yes Black hat seo is an unethical way of doing seo we are not considering Google guidelines in black hat seo.where we are using black hat seo given below:-
1)Hidden text
2)Meta keyword stuffing(in description)
3)Meta keyword stuffing(in meta keywords)
4)Doorway or gateway pages.
5)Link Farming
White hat seo is an ethical way of doing Seo where we work by following the Google guide lines.If we are not doing above things that means we are doing white hat seo.
Thnx...

Black Hat SEO technique involves the usage of various non ethical techniques like keyword stuffing, cloacking, hidden text which all help in fast ranking but are banned by Google and result in penalty. White Hat SEO Technique is a pure ethical way of generating backlinks and quality search engine ranking to your website.

Black hat technique is unettical technique.The work we are doing is against the search engine guidlines and  we are cheating the search engine if they do so they will give you paynalty.
White hat technique is ettical technique.by fallowing search engine guildlines we do optimization here.so it help us to bring our website on top with right manner.

Black Hat SEO practices typically involve backlink schemes, or techniques to trick search engines into thinking your site is about something different from what it's about.
White Hat SEO, it is a search engine terminology that refers to the usage of strategies techniques or tactics that focus on human audience.

Black hat SEO means wrong process which Google hates and white hat means Google loves this SEO.