Question

Why does fresh food become stale and tasteless when
exposed to air?​

Answer 1

Iᴛ ɪs ʙᴇᴄᴀᴜsᴇ ᴏɪʟ ʙᴇᴄᴏᴍᴇs ʀᴀɴᴄɪᴅ ᴡʜᴇɴ ᴇxᴘᴏsᴇᴅ ᴛᴏ ᴀɪʀ. Hᴇʀᴇ ᴛʜᴇ ᴜɴsᴀᴛᴜʀᴀᴛᴇᴅ ғᴀᴛ ᴄᴏɴᴛᴀɪɴᴇᴅ ɪɴ ᴏɪʟ ɢᴇᴛs ᴏxɪᴅɪᴢᴇᴅ ᴀɴᴅ ᴛʜᴇ ᴏxɪᴅᴀᴛɪᴏɴ ᴘʀᴏᴅᴜᴄᴛs ғᴏʀᴍᴇᴅ ᴄᴀᴜsᴇs ᴛʜᴇ ʙᴀᴅ ᴛᴀsᴛᴇ ᴀɴᴅ sᴍᴇʟʟ ᴏғ ғᴏᴏᴅ. Rᴀɴᴄɪᴅɪᴛʏ ᴏғ ᴏɪʟ sᴘᴏɪʟs ᴛʜᴇ ғᴏᴏᴅ ɪᴛᴇᴍ ᴀɴᴅ ᴍᴀᴋᴇs ᴛʜᴇ ғᴏᴏᴅ ᴛᴀsᴛᴇʟᴇss.

Hᴏᴘᴇ ɪᴛ ʜᴇʟᴘs..... ❤❤

Answer 2

Answer:

It is because oil becomes rancid when exposed to air. Here the unsaturated fat contained in oil gets oxidized and the oxidation products formed causes the bad taste and smell of food. Rancidity of oil spoils the food item and makes the food tasteless.

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