JEE Advanced 2016 Chemistry question

The **CORRECT** statement(s) for cubic close packed (*ccp*) three dimensional structure is(are)

(A)The number of the nearest neighbours of an atom present in the topmost layer is 12
(B)The efficiency of atom packing is 74%Correct
(C)The number of octahedral and tetrahedral voids per atom are 1 and 2, respectivelyCorrect
(D)The unit cell edge length is times the radius of the atomCorrect

Answer: (B),(C),(D)

Solution

(A) An atom in the bulk has 12 nearest neighbours (6 in its layer, 3 above, 3 below), but an atom in the topmost layer has no layer above it, so it has only 9: false. (B) Packing efficiency of ccp =

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-026564