Rishi went to Shimla to say at this uncle's place during holidays. One morning, he found a thick blanket of snow in front of his door. His uncle started sprinkling common salt on the ice slit in front of his door.
Answer the following questions
what is de-icing agent?

Rishi went to Shimla to say at this uncle's place during holidays. One morning, he found a thick blanket of snow in front of his door. His uncle started sprinkling common salt on the ice slit in front of his door. Answer the following questions Can we use any other substance instead of common salt?