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Methods to Form Lyophobic Colloids

Solder is com...

Question

Solder is commonly seen with electrician joining two points in a circuit by using a solder wire which is low melting and immediately solidifies. What is its composition?

S n

and

P b

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S n

and

F e

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F e

and

P b

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F e

and

C r

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Solution

The correct option is B $S n$ and $P b$
Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal (solder) into the joint, the filler metal having a lower melting point than the adjoining metal. Soldering differs from welding in that soldering does not involve melting the work pieces.
Solder contains: 63% tin : 37% lead : 2% silver.
Hence option A is correct.

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F e^{2 +} | F e

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- 0.44 V

- 0.14 V

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E . M . F .

State the constituents of solder and their percentage composition. Which property of solder makes it suitable for welding electrical wires?

P b

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P b^{2 +}

F e^{2 +}

(E_{P b^{2 +} / P b}^{0} = - 0.126 V, E_{F e^{2 +} / F e}^{0} = - 0.44 V)

S n^{2 +} a n d F e^{3 +}

S n^{2 +}

F e^{3 +}

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