Question

Sarath decided to paint his house.He mixed moderate quantity of calcium oxide with water in a plastic container. He observed that the container was warm, got curious and started adding more and more of CaO in the water. What will he observe?

• A. The temperature of the container increases.
• B. The temperature of the container decreases.
• C. The water starts boiling after some time.
• D. The temperature of the container increases and the water starts boiling after sometime

Answer 1

The correct option is D

The temperature of the container increases and the water starts boiling after sometime

When more CaO is added in water, the heat from the reaction increases so there will be a rise in temperature of the container. Soon water will start boiling due to excess heat liberated due to the exothermic nature of the reaction.