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Assertion: Crystalline solids have short...

Assertion: Crystalline solids have short range order.
Reason: Amorphous solids have long range order.

A

If both assertion and reason are true and the reason is the correct explanantion 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.

Text Solution

Verified by Experts

The correct Answer is:
D
Crystalline solids have regular arrangement of constituent particles and are anisotropic whereas amorphous solids have no regular arrangement and are isotropic.
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Knowledge Check

  • Assertion: Crystalline solids are anisotropic. Reason: Cystalline solids are not as closely packed as ionic solids.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion
    C
    If assertion is correct but reason is incorrect
    D
    If both assertion and reason are incorrect

  • Assertion: Quartz glass is crystalline solid and quartz is an amorphous solid Reason: Quartz glass has long range order

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

  • Assertion (A) : Crystalline solids are anisotropic in nature. Reason (R) : Crystalline solids melt at a sharp and characteristic temperature.

    A
    Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
    B
    Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
    C
    Assertion (A) is correct, but Reason (R) is incorrect statement.
    D
    Assertion (A) is incorrect, but Reason (R) is correct statement.

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    Assertion Amorphous solids are isotropic. Reason (R) Amorphous solids do not possess rigidity.

    Select the correct statements. (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic. (C) Amorphous solid are sometimes called pseudo solids. (D) Amorphous solids soften over a range of temperatures. (E) Amorphous solids have a definite heat of fusion. Choose the most appropriate answer from the options given below.

    Assertion: Crystalline solids can cause X-rays to diffract. Reason: Interatomic distance in crystalline solids is of the order of 0.1nm .

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    Assertion (A) Crystalline solids are anisotropic. Reason (R) The constituent particles are very closely packed.

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