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Which of the following is used in welding broken pieces of iron rails and machine parts?

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Of the following commonly used materials, the one that is not an alloy is

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The manufacture of iron from iron ore involves the process of

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The manufacturing of iron from iron ore involves the process of

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The important ore of aluminium is

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Which of the following elements is not present in stainless steel?

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Which one of the following minerals is found in pure form?

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What is the principal ore of aluminium ?

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Burning pyrites ore gives out

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Which one of the following pairs is not correctly matched?

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Galvanised iron is made by coating iron with

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Slag is a name given for

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Solder is an alloy of

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Solder is an alloy of

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Solder metal is an alloy of

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The most important ore of lead is

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Steel contains

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Which is the purest commercial form of iron ?

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The most abundant metal in the Earth’s crust is

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The ore of Aluminium is

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