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What are the constituents of solder allo...

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

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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.
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