If one of the metals is mercury, then the alloy is known as an amalgam. The electrical conductivity and melting point of an alloy is less than that of pure metals. For example, brass, an alloy of copper and zinc (Cu and Zn), and bronze, an alloy of copper and tin (Cu and Sn), are not good conductors of electricity whereas copper is used for making electrical circuits. Solder, an alloy of lead and tin (Pb and Sn), has a low melting point and is used for welding electrical wires together.
1. Copper and tin are -
a. Bad conductors
b. Good conductors
2. Electrical circuits can be made from _____.
a. Alloy
b. Copper
3. What is an amalgam?
a. Mercury
b. Alloy
4. Sate True or False :
Brass is an alloy of Pb and Sn.
a. TRUE
b. FALSE
5. Which of following is an alloy of copper?
a. Brass
b. Bronze
c. Solder
d. Tin
