anubhav074 :
not all laptops came with solded processors the laptop which i am using is also one of them.
Older laptop CPUs were more often in sockets that were removable than newer ones. If you want to get a new laptop, get one with plans for it to last as it for the time you will be using it.
If your budget is in rupees, you can get a mid-range general use system with an intel i5 CPU.
This Asus has a 1080p screen, with an i3 CPU, plenty for general use: Asus F555LA
This is a very good spec system for the price,
http://www.newegg.com/Product/Product.aspx?Item=N82E16834315131
List of all systems for $4-500 with Intel i5 or AMD A10 CPUs that should be good for several years...