CBSE Class 8 Answered

The following observations can help us determine whether the food inside a sealed can is infected with microbes:

• A bulging can or lid or a broken seal
• A can or lid that shows signs of corrosion
• Food that has oozed or seeped under the jar’s lid
• Gas formation indicated by tiny bubbles moving upward in the jar or bubbles visible when you open the can
• Food that looks mushy, moldy or cloudy
• Food that gives off an unpleasant odour when you open the jar
• Spurting liquid from the can or jar when you open it