So after a bit of searching, I got it. Now I can able to format chapter name and page number in the same line (as in the above picture).

I have got another problem. Some chapter names are longer than the other. Either I get the formatting with shorter chapter names or the longer ones.

I used Right Tab between chapter name and page number. Shorter chapter names need two tabs which makes longer names into two lines and longer chapter names need one tab which makes the page number in the middle of the line (in one tab distance).

How can I fit chapter name in one line and at the end of the line page number??

Thanks in advance.