Quiz 2 alkane and alkene with answers

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Quiz 2 alkane and alkene with answers

  1. 1. Quiz 2 on alkane and alkene <ul><li>With answers </li></ul>
  2. 2. <ul><li>1) State 5 physical properties of ethane ( 5 marks) </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>………………………………………………………………………………… . </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>2) Chemical properties of alkanes (20 marks) </li></ul><ul><li>a) Write chemical equation for complete combustion of methane </li></ul><ul><li>………………………………………………………………………………………… . </li></ul><ul><li>b) Write BOTH STRUCTURAL AND MOLECULAR equations for substitution reaction of methane </li></ul><ul><li>Step 1 ………………………………………………………………………… </li></ul><ul><li>Step 2 ……………………………………………………………………………… </li></ul><ul><li>Step 3 ………………………………………………………………………………… </li></ul><ul><li>Step 4 ………………………………………………………………………………… </li></ul>
  3. 3. <ul><li>3) State 5 physical properties of ethene ( 5 marks) </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>………………………………………………………………………………… . </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>………………………………………………………………………………… </li></ul><ul><li>……………………………………………………………………………… . </li></ul><ul><li>4) Chemical properties of alkenes ( 20 marks) </li></ul><ul><li>Write BOTH STRUCTURAL AND MOLECULAR equations for ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of hydrogen ……………………………………………………………………………….. </li></ul><ul><li>Addition of bromine ……………………………………………………………………………….. </li></ul><ul><li>Addition of hydrogen chloride …………………………………………………………………. </li></ul><ul><li>Addition of water ……………………………………………………………………………………… </li></ul><ul><li>Addition of hydroxyl group (oxidation with KMnO4 acidified)…………………end </li></ul>
  4. 4. answers
  5. 6. <ul><li>State 5 physical properties of ethane </li></ul><ul><li>Low melting and boiling point </li></ul><ul><li>Low density </li></ul><ul><li>Not soluble in water </li></ul><ul><li>Soluble in organic solvent </li></ul><ul><li>Cannot conduct electricity </li></ul>
  6. 7. Chemical properties of alkanes (20 m) a) Write chemical equation for complete combustion of methane Correct reactant = 2m Correct product = 2m
  7. 8. Write BOTH STRUCTURAL AND MOLECULAR equations for substitution reaction of methane
  8. 9. <ul><li>Step 1 </li></ul><ul><li>CH 4 + Cl 2 ---------> CH 3 Cl + HCl </li></ul><ul><li>                  </li></ul>
  9. 10. step 2 CH 3 Cl + Cl 2 -------> CH 2 Cl 2 + HCl             
  10. 11. <ul><li>Step 3 </li></ul><ul><li>CH 2 Cl 2 + Cl 2 ---------> CHCl 3 + HCl </li></ul><ul><li>                  </li></ul>
  11. 12. step 4 CHCl 3 + Cl 2 -------> CCl 4 + HCl              Cl Cl
  12. 13. <ul><li>State 5 physical properties of ethene </li></ul><ul><li>Low melting and boiling point </li></ul><ul><li>Low density </li></ul><ul><li>Not soluble in water </li></ul><ul><li>Soluble in organic solvent </li></ul><ul><li>Cannot conduct electricity </li></ul>
  13. 14. <ul><li>ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of hydrogen </li></ul>
  14. 15. <ul><li>ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of bromine </li></ul>
  15. 16. <ul><li>ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of hydrogen chloride </li></ul>
  16. 17. <ul><li>ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of steam </li></ul>
  17. 18. <ul><li>ADDITIONAL REACTION of ethene </li></ul><ul><li>Addition of KMnO4 acidified </li></ul>

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