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(A) Graphite is soft while diamond is ha...

(A) Graphite is soft while diamond is hard.
(R) Graphite has three dimensional structure while diamond has planar.

A

If both (A) and (R) are correct, and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct but (R) is not the correct explanation of (A).

C

If (A) is correct but (R) is incorrect.

D

If (A) is incorrect but (R) is correct.

Text Solution

Verified by Experts

The correct Answer is:
C
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Assertion (A) : Graphite is soft while diamond is very hard . Reason (R) : Graphite has a hree -dimensional structure while diamond has planer struture .

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Graphite is denser than diamond.

Diamond is harder than graphite.

Why is diamond hard while graphite is soft?

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Diamond And Graphite

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Knowledge Check

  • Assertion (A) : Graphite is soft while diamond is very hard . Reason (R) : Graphite has a hree -dimensional structure while diamond has planer struture .

    A
    If both (A) and (R) are correct and (R) is correct explanation of (A)
    B
    If both (A) and (R) are correct and (R) is not correct explanation of (A)
    C
    If (A) is correct , but (R) is incorrect
    D
    If (A) is incorrect but (R) is correct

  • Graphite is soft while diamond is hard because

    A
    Graphite in powder form
    B
    Diamond has `sp^(2)` hybridization but graphite has `sp^(3)` hybridization
    C
    Graphite is in planar form while diamond is in tetrahedral form
    D
    Graphite is covalent and diamond is ionic

  • Diamond is harder than graphite because

    A
    Graphite is planar
    B
    Diamond has free electron
    C
    Graphite is `sp^(3)` hybridised
    D
    None of these