Assertion: In hexagonal close packing, voids are between three touching spheres whose centres lie at the corners of an equilateral triangle.
Reason: In hexagonal close packing, voids are called square voids.

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

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Assertion is right but Reason is wrong.

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Assertion is wrong but Reason is correct.

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Solution

The correct option is C Assertion is right but Reason is wrong.
In hexagonal close packing, voids are between three touching spheres whose centres lie at the corners of an equilateral triangle.
If $X$ is the number of atoms in hcp lattice, then
the number of trigonal voids $= 8 X$ ,
the number of tetrahedral voids $= 2 X$ and
the number of octahedral voids $= X$ .

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Similar questions

Q. Assertion :In hexagonal close packing, voids are in between the three touching spheres whose centres lie at the corners of an equilateral triangle. Reason: In hexagonal close packing, voids are called square voids.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements and Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre, is four.

Reason (R) Besides the body centre there is one octahedral void present at the centre of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells.

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion: In hexagonal close packing, voids are between three touching spheres whose centres lie at the corners of an equilateral triangle.Reason: In hexagonal close packing, voids are called square voids.

Assertion: In hexagonal close packing, voids are between three touching spheres whose centres lie at the corners of an equilateral triangle.
Reason: In hexagonal close packing, voids are called square voids.