Question

A student took solid quick lime in a china dish and added a small amount of water in it

state the type of sound produced in the reaction

Mention the type of the reaction

Answer 1

Answer:

(i) A hissing sound will be created during the reaction.

(ii) It is a combination reaction.

Hope this helps you.

Answer 2

Answer:

• When water is added to "solid quicklime" in a china dish, a "hissing sound is produced".
• The calcium oxide in quicklime starts to react with water and forms slaked lime which is calcium hydroxide and this reaction is called slaking of lime.

                              $\mathrm{CaO}(\mathrm{s})+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_{2}$

• The china dish gets heated slowly, which proves it is an exothermic reaction, and the hissing sound is due to the increased amount of heat released during the reaction.
• This is a typical reaction that takes place between a Group II metal oxide and water and is a non-redox reaction.