If the inside of the car became impure and after it is purified it was dried due to sun light. If a person's wet hand touches that part will it be Najis? And suppose he sits with a wet clothes because of sweating in such case what is the ruling.

Mobile things are not purified by the sun.

I was born in a particular place where my ancestors still own properties as well as my Uncles are staying there & I often visit the place during summer vacation for a short period, in that case do I have to pray full Namaz or Qasr there.

If you migrated from this place and resided somewhere else then you pray a traveller’s prayer when you pass by it.

I am employed at the central bank of my country and my responsibilities include making correspondence with banks, categorizing each bank as good, satisfactory, or bad etc. with respect to financial position and the like. Please guide me whether my salary is permissible?

If your work in the bank does not include editing deals that involve interest or participating in forming such contracts by being a party in the deal, then working in banks is permissible. The cash bills that you receive from the government from such work as salary if they were previously owned by muslims, are called “Majhool Al-malik”. The religious obligation on it is to receive it with the intention of being on behalf of His Eminence (may Allah grant him a long life), and then intend to