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6. soft water takes a ______ amount of soap to create a ______.

  • small, lather
  • large, lather
  • large, froth
  • small, froth

7. Name two things to describe an Alkane and what is it's general formula ?

  • unsaturated
  • single bond, saturated, CnH2n+2
  • double bond
  • CnH2n

8. chlorination does what ?

  • kills bacteria
  • chlorifies the water
  • purifies the water

9. harm water forms what?

  • slime
  • limescale
  • dirt
  • gunge

10. A polymer is lots of......

  • monomers
  • particles
  • atoms

11. small alkAne molecules can be used as fuel because....

  • they are reactive
  • they burn well
  • they melt easily

12. when potassium is burnt it produces a ________ flame.

  • lilac
  • purple
  • pink
  • blue