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(A) All minerals are ores (R ) Ores ar...

(A) All minerals are ores
(R ) Ores are minerals from which metal can be extracted convenitly and economically

A

Statement - 1 is True, Statement - 2 is True, Statement - 2 is correct explanation of Statement -1.

B

Statement - 1 is True , Statement - 2 is not a correct explanation of Statement - 1.

C

Statement - 1 is True, Statement - 2 is False.

D

Statement - 1 is False, Statement - 2 is True.

Text Solution

Verified by Experts

The correct Answer is:
D
Correct statement - 1 : All ores are minerals.
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Minerals from which metals are extracted conveniently and economically are called ____.

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Knowledge Check

  • Assertion: All minerals are ore. Reason: Ores are minerals from which metal can be extracted conveniently and economically.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If assertion is false but reason is true.

  • 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

  • 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.

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    The mineral from which a metal can be extracted profitably is called ______.

    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

    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

    Assertion (A): A mineral is called ore, when metal is extracted from it conveniently and economically. Reason (R): All ores are minerals but all minerals are not ores.

    The metal which can be extracted from pyrolusite ore is:

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