Chemistry - Complete s-block Question with Solution | TestHub

Barium sulphate ($BaS{O}_4$) is used in medicine as a barium meal for intestinal X-rays. It is highly insoluble in water and gastric juices, which prevents the toxic barium ions from being absorbed into the bloodstream. Its high atomic number makes it an excellent radiocontrast agent that absorbs X-rays, providing clear imaging of the gastrointestinal tract.

Answer: Barium sulphate