Inorganic chemistry - igcse

1. What is an industrial use of calcium carbonate?

• cracking of hydrocarbons

• manufacture of aluminium

• manufacture of cement

• purification of water

2.Which product is formed when calcium carbonate undergoes thermal decomposition?

• calcium

• calcium hydroxide

• calcium oxide

• calcium silicate

3. Which process does not produce carbon dioxide?

• combustion of a hydrocarbon

• photosynthesis

• reaction between an acid and a metal carbonate

• respiration

4.Which statement about lime and limestone is correct?

• Calcium oxide is formed from limestone in a displacement reaction

• Lime is used to treat alkaline soils.

• Limestone is a waste material in the manufacture of iron.

• Slaked lime is used in the process of flue gas desulfurisation.

5. When solid S is heated strongly, it forms gas G. G turns limewater cloudy. What are S and G and which type of reaction does S undergo?

• calcium carbonate, carbon dioxide, combustion

• calcium carbonate, carbon dioxide , thermal decomposition

• sodium carbonate, oxygen, combustion

• sodium carbonate, oxygen, thermal decomposition

6.Which calcium compound does not neutralise an acid soil?

• calcium oxide

• calcium sulfate

• calcium hydroxide

• calcium carbonate

7.A student suggests four uses of calcium carbonate (limestone). Which suggestions are correct?

• manufacture of cement

• manufacture of iron

• treating alkaline soils

• making glass

8. Milky white ppt in lime water test is due to formation of

• Calcium oxide

• calcium hydroxide

• Calcium carbonate

• Carbon dioxide

9.Which of these statements are true?

• Co2 is used in fire extinguishers

• Solid Co2 is known as the dry ice

• Co2 is used in bleaching the paper

• Co2 is used in carbonated drinks

10.What is also known as quick lime

• calcium oxide

• calcium carbonate

• calcium

• Calcium hydroxide