How to write .htaccess 301 redirect rule? -

i need 301 redirect urls. here need redirect

http://www.site.com/?var= http://www.site.com/
and
http://www.site.com/123/folder/page.html?var= http://www.site.com/123/folder/page.html

redirect 301 /about.php http://www.kintek.com.au/about

note first half uses page location

redirect 301 /about.php 

and redirection full url

http://www.kintek.com.au/about