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Metals occur in nature in the free as we...

Metals occur in nature in the free as well as in the combined state. The less reactive metals are generally found in the free state. Most of the metals, however are found in the combined form as minerals. The minerals from which metals can be obtained on a commercial scale are called ores. In other words, the minerals from which metals can be extracted profitably are called ores. Thus, bauxite `(Al_(2)O_(3)*2H_(2)O)`and clay `(Al_(2)O_(3).2SiO_(2).2H_(2)O)` are minerals of aluminium. However, it is bauxite that is chiefly used to obtain aluminium commercially. So, bauxite, and not clay, is an ore of aluminium.
Metal which occurs in native state is

A

Na

B

Ca

C

Mn

D

Ag

Text Solution

Verified by Experts

The correct Answer is:
D
Ag is not reactive hence found in free state.
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Knowledge Check

  • Metals occur in nature in the free as well as in the combined state. The less reactive metals are generally found in the free state. Most of the metals, however are found in the combined form as minerals. The minerals from which metals can be obtained on a commercial scale are called ores. In other words, the minerals from which metals can be extracted profitably are called ores. Thus, bauxite (Al_(2)O_(3)*2H_(2)O) and clay (Al_(2)O_(3).2SiO_(2).2H_(2)O) are minerals of aluminium. However, it is bauxite that is chiefly used to obtain aluminium commercially. So, bauxite, and not clay, is an ore of aluminium. Halide ore is

    A
    Cinnabar
    B
    galena
    C
    calamine
    D
    horn silver.

  • Metals occur in nature in the free as well as in the combined state. The less reactive metals are generally found in the free state. Most of the metals, however are found in the combined form as minerals. The minerals from which metals can be obtained on a commercial scale are called ores. In other words, the minerals from which metals can be extracted profitably are called ores. Thus, bauxite (Al_(2)O_(3)*2H_(2)O) and clay (Al_(2)O_(3).2SiO_(2).2H_(2)O) are minerals of aluminium. However, it is bauxite that is chiefly used to obtain aluminium commercially. So, bauxite, and not clay, is an ore of aluminium. The most abundant metal on the earth's crust is

    A
    copper
    B
    aluminium
    C
    iron
    D
    zinc.

  • Metals occur in nature in the free as well as in the combined state. The less reactive metals are generally found in the free state. Most of the metals, however are found in the combined form as minerals. The minerals from which metals can be obtained on a commercial scale are called ores. In other words, the minerals from which metals can be extracted profitably are called ores. Thus, bauxite (Al_(2)O_(3)*2H_(2)O) and clay (Al_(2)O_(3).2SiO_(2).2H_(2)O) are minerals of aluminium. However, it is bauxite that is chiefly used to obtain aluminium commercially. So, bauxite, and not clay, is an ore of aluminium. Which of the following is a sulphide ore ?

    A
    Galena
    B
    Cryolite
    C
    Cuprite
    D
    Bauxite

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