96) Quick lime is a

• (a) carbonate of lime
• (b) oxide of calcium
• (c) product left immediately after the calcination of pure limestone
• (d) lime quickly treated with water

97) The chemical formula for lime is

• (a) CaCO3
• (b) CaO
• (c) CaO2
• (d) Ca2O3

98) The lime which consists almost entirely of calcium oxide, is called

• (a) poor lime
• (b) rich lime
• (c) hydraulic lime
• (d) limestone

99) The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as

• (a) poor lime
• (b) rich lime
• (c) hydraulic line
• (d) limestone

100) Eminently hydraulic lime is one in which the percentage of silica, alumina and iron oxide is

• (a) 5 to 10%
• (b) 10 to 25%
• (c) 25 to 30%
• (d) 30 to 40%