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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 the correct explanation for Assertion.
(b) Assertion and Reason both are correct statements but Reason is not the correct explanation for Assertion.
(c) Assertion is correct but Reason is wrong.
(d) Assertion is wrong but Reason is correct.
Assertion (A): The packing efficiency is maximum for the fcc structure.
Reason (R): The coordination number is 12 in fcc structures.
Answers (1)
The answer is the option (b) Assertion and Reason both are correct statements but Reason is not the correct explanation for Assertion.
In fcc unit cell, there is ccp arrangement with packing efficiency of 74.01% which is maximum. In ccp arrangement, coordination number is 12.
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