B1\B2 visa Query

I’ve a B1\B2 visa with my previous company ABC in which I have travelled to US for Business purpose (3 Months) and it is valid till 2020 and now I work for XYZ company. Is it possible to travel to the US with this B1\B2 visa for a one month as a Tourist visitor?

Where do I check if my B1\B2 is still valid? Though it is a B1, can I travel as a B2 and what documents would be needed to support my one month visit in the US. Pls guide.

You can use it for B-1 or B-2 purposes interchangeably. Unless it is marked as canceled in the passport, it can be used for travel.