Home
Class 12
CHEMISTRY
Assertion : Graphite is an example of te...

Assertion : Graphite is an example of tetragonal crystal system.
Reason : For a tetragonal system, `a=bnec,alpha=beta=90^(@),gamma=120^(@)`.

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 both (A) and ( R) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
D
Graphite is an example of hexagonal crystal system (Each C-atom is `sp^(2)`- hybridized and is linked to three other C-atoms in a hexagonal planar structure). For a tetragonal system, `a=bnec,alpha=beta=gamma=90^(@)`.
For a hexagonal system `a=bnec,alpha=beta=90^(@),gamma=120^(@)`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SOLID STATE

    BRILLIANT PUBLICATION|Exercise QUESTIONS|14 Videos

  • SOLID STATE

    BRILLIANT PUBLICATION|Exercise LEVEL-1|50 Videos

  • SOLID STATE

    BRILLIANT PUBLICATION|Exercise LEVEL-II|50 Videos

  • REDOX REACTION & ELECTROCHEMISTRY

    BRILLIANT PUBLICATION|Exercise QUESTION (ELECTROCHEMISTRY) (LEVEL -II) (ASSERTION-REASON)|3 Videos

  • SOLUTIONS

    BRILLIANT PUBLICATION|Exercise Level-III (Linked Comprehension Type)|12 Videos

Similar Questions

Explore conceptually related problems

Give one example for the above crystal system.

Example of unit cell with crystallographic diamensions a!=b!=c,alpha=gamma=90^(@),beta!=90^(@) is

Knowledge Check

  • Assertion: Sponges belong to porifera. Reason: Sponges have canal system

    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 both assertion and reason are false.

  • Assertion : Only principal quantum number determines the energy of an electron in an orbital of Na atom. Reason : For one electron system, the expression of energy is quite different from that obtained in Bohr's theory. : If both (A) and (R) are correct and (R) is the correct explanation of(A)., If both (A) and (R) are correçt, but (R) is not the correct explanation of (A)., If (A) is correct, but (R) is incorrect., If both (A) and (R) are incorrect.

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

  • The crystal system of a compound with unit cell diemension a=0.387,b=0.387 and c=0.504nm alpha=beta=90^0 anb gamma=120^0

    A
    cubic
    B
    hexagonal
    C
    orthorhombic
    D
    rhombohedral

    • Similar Questions

    Explore conceptually related problems

    Identify the crystal systems which have the following crystall ographic dimensions.Give one example for each. a!=b!=c alpha=beta=gamma=90^@ , a=b!=c alpha=beta=90^@ gamma=120^@

    The unit cell dimensions of a particular crystal system is given below a=b=c, alpha=beta=gamma != 90^@ Identify the crystal system.

    Unit cells can be broadly classified into 2 categories primitive and centred unit cells. The unit cell dimension of a particular crystal system is a = b = c and alpha = beta = gamma = 90°. Identify the crystal system.

    The unit cell dimension of a particular crystal system is a=b=c, alpha=beta=gamma=90 , identifiy the crystal system.

    Assertion: Artificial system separates the closely related species. Reason: Artificial systems were based on a few characteristics.

    Home
    Profile