Evicting sons

If the house property belongs to you by a registered sale deed on your name, then you are the absolute owner of the property.

You can send an eviction notice instructing all of them to vacate the property and deliver vacant possession failing which you can file a suit for ejectment to eject them from the property. Since they are unauthorised occupants of  the property even though they are your sons, but they are adults and cannot claim any rights in the property not at least during your lifetime, therefore they are liable to be ejected from the property by due process of law if they don't comply with your demand to vacate. 

Senior citizens can file application before SDM Court to evict their sons/daughters from their self acquired property under the provisions of  Senior citizen Act.SDM court Grant's relief within six months.

You have both the options to get them evicted from your self-acquired property as advised by learned experts hereinabove, which I fully agree with them and appreciate their acumen, analyses, opinion and advise.

Father can file a suit for possession

Another interconnected matter. Are there any chances of wife claiming this property as a part of alimony in divorce case ??? Which order will be upheld, will the eviction suit sustains in magistrate court in favour of me or will family court in her favour?

Eviction is totally different to alimony, flat / property can not be granted to wife in lieu of alimony in a divorce case untill you accept.