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प्रश्न
Give the composition of an alloy called solder. State its one property and one use.
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उत्तर
The composition of solder alloy is 50 per cent lead (Pb) and 50 per cent tin (Sn).
It has a very low melting point that is quite less than its constituting metals (Pb and Sn). Thus, solder is widely used in soldering and welding of electrical wires.
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