Uses of Metals and Alloys

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  • Q1

    An alloy ‘X’ has low melting point and good casting properties. It is used for making printing blocks. The X is

    Marks:1
    Answer:

    type metal.

    Explanation:

    Type metal contains lead (75%), antimony (15%) and tin (10%). It has low melting point and good casting properties. It expands on solidification and is used for making printing blocks.

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  • Q2

    An alloy is a

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    Answer:

    mixture of metals or metals with non-metals.

    Explanation:

    An alloy is a homogeneous mixture of two or more metals or one or more metals with certain non-metals.

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  • Q3

    An alloy of aluminium used in aircraft construction is

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    Answer:

    duralumin.

    Explanation:

    Duralumin is light but as strong as steel. It is resistant to corrosion. Hence, it is used in aircraft construction.

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  • Q4

    Elements used for making stainless steel are

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    Answer:

    Fe, Cr, Ni and C.

    Explanation:

    Stainless steel is made of Fe (73%), Cr (18%), Ni (8%) and C (1%).

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  • Q5

    The metals copper, zinc and tin are present in the alloy

    Marks:1
    Answer:

    bronze.

    Explanation:

    Bronze contains Cu (80%), Zn (2%) and Sn (18%).

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