Engineering Materials
The usual composition of a soldering alloy is

Tin and lead
Tin, lead and small percentage of antimony
Tin, lead and silver
Tin and copper

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Engineering Materials
Pick up wrong statement about wrought iron

It is very soft and ductile
It melts at 1535°C
It contains carbon of the order of 0 to 0.25%
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling

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