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6. calcium carbonate reacts with

  • water
  • acid
  • oxygen

7. how do you make concrete

  • cement powder + water
  • cement powder + water + sand + aggregate
  • cement powder + water + sand

8. how do you obtain limestone

  • through oil
  • quarrying
  • begging

9. how do you make mortar

  • cement powder + water
  • cement powder + water + sand
  • cement powder + water + sand + aggregate

10. ionic bonding is

  • two metals
  • metal and non metal
  • two non metals

11. covalent bonding is

  • two non metals
  • two metals
  • non metal and metal

12. chemical formular for limestone

  • CaCO3
  • CACO3
  • caco3