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1.why do vaccum packed chips not get spoiled?

2. a child is suffering from cholera. answer the following question---
1.name the causative agent and mode of transmission for the disease.
2. stat any to preventive measure against the disease.
plz give answer of both the question



1. because the packets are flushed with nitrogen gas before they are sealed. this prevents the oxygen to react with the food and oxidize it.

2. the mode is through water. filtering the water properly before drinking it. seeking govt. help for better drinking facilities

2 5 2
zenith99 the first answer could be for 8th standard plz.............
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