In the 17th century, Johann Glauber first prepared sulfuric acid by burning sulfur with potassium nitrate with steam. A famous salt was then called to be Glauber's salt. Which of the following is it?

MCQs on group 15, 16, 17 and 18 elements, dinitrogen, ammonia, nitrogen oxides, nitric acid, phosphorus and sulphur allotropic forms, sulphuric acid, phosphine, phosphorus halides, phosphorus, sulphur and halogens oxoacids, dioxygen, chlorine, hydrogen chloride and interhalogen compounds.