Question

*............. this reaction is an exothermic one.*

1️⃣ Take handful of urea and put it in water.
2️⃣ Take washing powder in hand and dip it in water.
3️⃣ Limestone dipped into the water.
4️⃣ Caustic soda poured into the water.​

Answer 1

Answer:

Caustic soda poured into the water.