Question

The furnace which gives the highest temperature is:
A. Blast furnace
B. Reverberatory furnace
C. Electrical furnace
D. Muffle furnace

Answer 1

Furnaces are used for heating purposes. They may heat up any substance, which is to be molded, and are useful in providing high temperatures for any industrial work.

Complete answer: Furnaces are useful in creating a high temperature environment. Various furnaces are employed for different purposes. Some furnaces are:
- Blast furnace: this type of furnace is used in industries to obtain various metals, like pig iron. This works on the heat generated by air under high pressure. It has a temperature range from $900{}^\circ C-1300{}^\circ C$.
- Reverberatory furnace: this type of furnace is used in the extraction of metals like copper, tin, nickel, etc. This furnace does not have direct contact with the metal, but uses a flame blown on them. It is used for melting or smelting. It works on a temperature of $1927{}^\circ C$.
- Electrical furnace: These types of furnaces contain a supply of electrical sources for raising the temperature. It is used in melting alloys. It works on the temperature between $1800{}^\circ C-3000{}^\circ C$
- Muffle furnace: This type of furnace is used to extract ashes of various compounds. It has a temperature of $1200{}^\circ C$
Hence, the furnace that has the highest temperature is an electrical furnace, with $1800{}^\circ C-3000{}^\circ C$.

Note: Muffle furnace can be used in a laboratory to convert a substance into ashes, or to test various substances. Also electrical furnaces are used to melt compounds. While, blast and reverberatory furnaces have mainly industrial applications.