question_answer 76)

  What are the constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?  

Answer:

                  Solder is an alloy of lead (Pb) and tin (Sn). It contains 50% lead and 50% tin. Solder has a low melting point. So, it is used for soldering (or welding) electrical wires together.