Madhya Pradesh Police Exam Model Paper 5

The Correct Answer is Lime.

• The chemical name of lime is Calcium oxide (CaO).
• Lime is a metal oxide.
• Metal oxides are basic in nature.
• They react with acids to produce salt and water.
• CaO+HCI→CaCl2+H2O

• The chemical name of marble is calcium carbonate.
• It is an inorganic chemical compound with the chemical formula CaCO3 .
• When an acid reacts with a metal carbonate (or metal hydrogen carbonate), then a salt, carbon dioxide
  gas and water are formed
• CaCO3+HCl→CaCl2+H2O+CO2
• The Chemical Formula for Baking soda is Sodium Bicarbonate.
• When baking soda reacts with acid it produces carbon dioxide.
• NaHcO3+HCI→NaCI+CO2+H2O