Question

why always junk food give in silver disposal

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Answer 1

Because Junk foods are sometimes oily and the silver disposal has capacity to absorb the oil and it doesn't let the oil spread over the hands.

Answer 2

Answer:

Some people may not want it so they throw it down the drain.

Explanation:

Instead of just throwing it away they but it in a garbage disposal as another way of disposing it. Just throwing it away might make your house stink so that's why they use the garbage disposal.

Hope that answers your question :)