On heating gypsum at 373K, it loses water molecules and becomes calcium sulphate hemihydrate. This substance is used to make toys, material for decoration and smooth surfaces. What is this substance commonly known as?
A. Clay
B. Plaster of Paris
C. Cement
D. Alabaster
Answer: Option B
This Question Belongs to Chemistry GK Chapter Wise >> Metal And Its Compounds
Related Questions on Metal and Its Compounds
Which of the following metals cannot be easily cut by a knife?
A. aluminium
B. sodium
C. potassium
D. lithium
The chemical structure of the pearl is
A. Calcium Carbonate
B. Calcium Carbonate & Magnesium Carbonate
C. Calcium Chloride
D. Calcium Sulphate
Stainless steel does not rust because
A. chromium and nickel combine with iron
B. chromium forms an oxide layer and protects iron from rusting
C. nickel present in it, does not rust
D. iron forms a hard chemical compound with chromium present in it
Join The Discussion