INVESTIGATORY PROJECT CLASS 12 CHEMISTRY Effect of time

1. Effect Of Time:-
1. Take three bottlesandlabel themasI,II , III.
2. To each bottleadd 25 gram of Jamand 1 gram of potassium
bisulphate.
3. Keep bottleI for7days , bottleIIfor 14 days andbottle IIIfor21
days at roomtemperature.
4. Note thechanges takingplace in each bottleandrecord the
Observations.
RECORD:-
Bottle
No.
Observations (days)
7 14 21
I. No change
**********
*********
II. No change Taste Changes
**********
III. No change No change
Unpleasant
smell
develops

2. RESULT :- With increase of days,thequality of the
Jam deteriorates.