Statement - I : CaSO4 is called dead burnt gypsum because it does not set with waterStatement - II : Mixture of 1 part of slaked lime, 3 parts of sand and water is known as mortar

CaSO4 is called dead burnt gypsum, because it loses the properties of setting with water, means dead burnt gysum on warming with water remains as it is1 part of slaked lime + 3 parts of sand and water is called mortar