JEE Advanced 2016 Paper 2 Offline

MCQ (More than One Correct Answer)

-2

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

The number of the nearest neighbours of an atom present in the topmost layer is 12

The efficiency of an atom packing is 74%

The number of octahedral and tetrahedral voids per atom are 1 and 2, respectively

The unit cell edge length is $$2 \sqrt 2$$ times the radius of the atom

JEE Advanced 2015 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are

1/2, 1/8

1, 1/4

1/2, 1/2

1/4, 1/8

IIT-JEE 2009 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

The correct statement(s) regarding defects in solids is (are)

Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion.

Frenkel defect is a dislocation defect.

Trapping of an electron in the lattice leads to the formation of F-centre.

Schottky defects have no effect on the physical properties of solids.

JEE Advanced Subjects