Solder is essentially a
Tin-lead base alloy
Silver-lead base alloy
Bismuth-lead base alloy
Tin-silver base alloy
Tin-lead base alloy
Soldering is a method of joining
similar or dissimilar metals by heating them to a suitable temperature and by
means of a filler metal, called solder, having liquidus temperature not
exceeding 450°C and below the solidus of the base material.
Two types of solder are
commonly used:
1. Soft solder : An alloy of
tin and lead
2. Hard solder : An alloy of
copper and zinc
Hence, the correct
option is (A).
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