3.a) Why does the food get spoiled ?how it can be prevented?
b)How potato chips are prevented from getting spoiled in packets for so many days?
Answers
Answer:
food is spoiled by the oxygen in the air.
Explanation:
a)Food is not spoiled,they are oxidised. this is bcoz when food reactes with air it is oxidised which changes their taste. These can be prevented by using of oils, nitrogen gas,etc.
b)packets of potato chips are filled with nitrogen gas which is really harmful for human beings,but it acts as an conservative.
Answer:
THE FOOD GETS SPOILED BECAUSE OF THE MICROBIAL ATTACK ON FOOD AND MANY OTHER WAYS. IT CAN BE PREVENTED BY COVERING THE FOOD, BOILING(OR)HEATING, COOLING ETC....BECAUSE THE MICROBES CANT SURVIVE WITH THE COOL TEMPERATURES AND HOT TEMPERATURES. IN POTATO CHIPS PACKET,MICROBIAL GROWTH IS NOT THERE BECAUSE THEY FILL NITROGEN IN THE PACKET. MICROBES ALSO NEED OXYGEN TO SURVIVE LIKE US.SO THEY ARE NOT THERE IN POTATO CHIPS PACKET.