Bottle I (7 days), Bottle II (14 days), and Bottle III (21 days) each contained 25g of jam and 1g of potassium bisulphate and were observed over time at room temperature. Bottle I showed no change after 7 days. Bottle II developed a changed taste after 14 days. Bottle III showed no change in taste but an unpleasant smell developed after 21 days, demonstrating that the quality of the jam deteriorates the longer it is kept at room temperature.

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.