Can I play video games using a laptop that has no graphic/video cards though has good processor and large RAM?

Yes, you can play old or low-end video games on laptops having no dedicated graphics card

You can play GTA 4, GTA: San Andreas, Half Life 2, Portal, Roller Coaster Tycoon 2, Left 4 Dead 1, etc.

You can't play GTA 5, TitanFall, Watch Dogs, BF4, Crysis 3, Assassin's Creed Unity, etc.

u need a good graphics card to even things out... i mean thts like saying ur a nice person, and understadning and caring etc but u dont have a job or stability so women dont go for you etc

Cloud based possibly.. Have never brought/tested this service though.

https://www.onlive.com/ (So this could be dangerous)

Other than that.. There are always old non-demanding games that should work.

https://www.youtube.com/watch?v=jyyg-go2j88

Hope it helps :)

Not in many cases, but sometimes with low performance.