Impurities on the body

Touching a Pigskin Leather Jacket

Q: If one touches with ones hand or clothes for example a pigskin leather jacket, does his hand/clothes become impure? If one is praying and someone joins the saff who is wearing a pigskin leather jacket, and during the Salaah the pigskin leather jacket does touch the person for a duration of one rukun does his Salaah become nullified?

Touching Some Dry Impurity

Q: If the clothing of a person, or a part of his bare body (such as his hand) or his khuff, touches an impure place which is dry, does it make it impure? For example, there was some urine on the carpet, and then it dried totally. If the above-mentioned things touch it, do they become impure?