How facebook can be hacked?? Truly speaking facebook cannot be hacked directly.there is a technique called phishing which means collecting login credentials from user by attacker using fake facebook pages which look similar to the original page.this method of creating fake pages is also known as "site cloning".phishing can be done in many ways,one of them were shown in this post.

Requirements :

•  Computer(laptop)
•  Kali linux operating system
• Social engineering toolkit 

Video Tutorial: Phishing facebook page using kali linux

Using this technique you can hack any website this method works in android too by installing kali linux in android and there many phising techniques for facebook hacking.

SECURE TIP: To stay safe from this kind of attacks you should always look at the address bar whether the link is" https" or not.if it is not https never dare to enter your login credentials.