Writing inference

***Please Take Note***
From next year onwards (2011), the old way of writing inference will not be accepted anymore.
The correct way of writing inference is the answer must have cause and effect (with reason).
eg : Write one inference about the beg in situation L.
Ans : Bag in L is lighter because the time taken to lift it is shorter.
eg : Write one inference about the soot produced during the burning of the distillate.
Ans : As the boiling points gets higher, more soot is produced because the fraction is less combustible.