Name type of fire extinguisher used for extingushing oil fires.

What type of fire extinguisher is used to extinguish fire caused by electricity?

Name the type of lenses used for correcting a myopic eye

Name the type of lenses used for correcting a an astigmatic eye?

Name the type of lenses used for correcting a hypermetropic eye

Baking soda is used in small amount in making bread and cake. It helps to make this soft and spongy and aqua solution of baking soda turns red litmus blue. It is also used in Soda acid fire extinguisher. Use this information to answer the following questions HOw does it help in extinguishing fire?