ABC26PH1320 · A one-dimensional crystal of lattice dimension 'a' is metallic. If the structure is distorted in such a way that the lattice dimension is… · JUNE 2011
ABC26PH0183 · Consider a n-type semiconductor whose Ev=0, EC=2.0eV and ED-1.98eV. The correct statement among the following is · 2011
ABC26PH1322 · Consider a n-type semiconductor whose Ev=0, EC=2.0\,eV and ED=1.98\,eV. The correct statement among the following is · DEC 2011
ABC26PH0186 · The wavelength and the spectral region for a single electron transfer across the band gap in a semi conductor (Ex-1.98 10-19 ) are [h=6.626… · 2012
ABC26PH1326 · The wavelength and the spectral region for a single electron transfer across the band gap in a semi-conductor (Ex=1.98 10-19 ) are [h=6.626… · JUNE 2012
ABC26PH0187 · When Si is doped with a Group V element · JUNE 2014
ABC26PH1340 · When Si is doped with a Group V element · JUNE 2014
Close Packing
ABC26PH1329 · The packing fraction of a simple cubic lattice is close to · DEC 2012
Crystal Systems Lattices
ABC26PH0185 · The lattice parameter of an element stabilized in a fcc structure is 4.04 . The atomic radius of the element is: · 2012
ABC26PH1325 · The lattice parameter of an element stabilized in a fcc structure is 4.04 . The atomic radius of the element is: · JUNE 2012
ABC26PH1327 · The angle between the two planes represented by the Miller indices (110) and (111) in a simple cubic lattice is: · DEC 2012self-practice
ABC26PH1328 · A metal crystallizes in fcc structure with a unit cell side of 500 pm . If the density of the crystal is 1.33 g/cc, the molar mass of the… · DEC 2012
ABC26PH1330 · Crystal A diffracts from (111) and (200) planes but not from (110) plane, while the crystal B diffracts from (110) and (200) planes but not… · DEC 2012
ABC26PH1331 · The coordinates for the atoms in a body centred cubic unit cell are · JUNE 2013
ABC26PH1332 · The inter planar distance () for a (100) plane in a cubic structure with the lattice parameter of 4 is: · JUNE 2013
ABC26PH1335 · A compound of M and X atoms has a cubic unit cell. M atoms are at the corners and body centre position and X atoms are at face centre… · DEC 2013
ABC26PH1336 · The angle at which the first order Bragg reflection is observed from (110) plane in a simple cubic unit cell of side 3.238 , when chromium… · DEC 2013
ABC26PH1338 · An element exists in two crystallographic - modifications with FCC and BCC structures. The ratio of the densities of the FCC and BCC… · DEC 2013
ABC26PH1339 · Metallic gold crystallizes in fcc structure with unit cell dimension of 4.00 . The atomic radius of gold is · DEC 2013
ABC26PH0188 · The interplanar spacing of (110) planes in a cubic unit cell with lattice parameter a=4.242 Å is · JUNE 2014
ABC26PH1341 · The interplanar spacing of (110) planes in a cubic unit cell with lattice parameter a=4.242 is · JUNE 2014
ABC26PH0189 · For a simple cubic crystal lattice, the angle between the [201] plane and the xy plane is · DEC 2015
ABC26PH1346 · For a simple cubic crystal lattice, the angle between the [2 0 1] plane and the xy plane is · DEC 2015
ABC26PH1349 · For a simple cubic lattice, the ratio between the unit cell length and the separation of two adjacent parallel crystal planes can NOT have… · JUNE 2016
ABC26PH1352 · Metallic silver crystallizes in face-centred-cubic lattice structure with a unit cell of length 40 nm . The first order diffraction angle… · JUNE 2017
ABC26PH1353 · Polonium is the only metal known to exist in a simple cubic lattice form. The density of polonium at 0°C is measured to be 10.00 g / cm3… · JUNE 2017
ABC26PH1354 · If the atoms/ions in the crystal are taken to be hard spheres touching each other in the unit cell, then the fraction of volume occupied in… · DEC 2017
ABC26PH1355 · The separation of the (123) planes of an orthorhombic unit cell is 3.12 nm . The separation of (246) and (369) planes are, respectively, · DEC 2017
ABC26PH1356 · If all the lattice points of an FCC structure are occupied by uniform hard spheres that touch each other, the fraction of volume occupied is · JUNE 2018
ABC26PH1358 · In a cubic crystal, the (111) and (222) reflections are observed, but not the (001) reflection. The Bravais lattice is · DEC 2018
ABC26PH1359 · A metal crystallizes with cubic close-packed structure. The 2 theta values of Bragg reflections of Miller Planes (200) and (111) are 0.18… · DEC 2018
ABC26PH0190 · The correct relationship among the following, for a tetragonal (a=b c, alpha = beta = gamma =90 ) crystal system, is · 2019
ABC26PH1360 · The correct relationship among the following, for a tetragonal (a=b c, alpha = beta = gamma =90 ) crystal system, is · JUNE 2019
ABC26PH1361 · Nearest neighbour distance in a crystal system of side length a is a√(2) in · JUNE 2019
ABC26PH1363 · X-rays of 173 pm wavelength are reflected by the (111) plane of a cubic primitive crystal at theta =30 . The unit cell length (in pm) is… · DEC 2019
ABC26PH1364 · Iron belongs to the BCC lattice. The Miller indices of the second allowed reflection in the powder diffraction pattern of iron would be · DEC 2019
ABC26PH1365 · In the ccp packing, the number of lattice points per unit area in the planes is in the order · DEC 2019
ABC26PH1366 · Plutonium (atomic mass =244\,g\,mol-1) crystallizes in monoclinic lattice (a=620\,pm, b=480\,pm, c=1100\,pm; beta =102 ) with 16 atoms per… · JUNE 2021
ABC26PH1367 · The miller indices of the planes parallel to the b axis and intersecting the a and c axis, as shown in the figure, are · JUNE 2021
Defects
ABC26PH1334 · When Frenkel defects are created in an otherwise perfect ionic crystal, the density of the ionic crystal · DEC 2013
Solid State Chemistry – General
ABC26PH1321 · The value of d111 in a cubic crystal is 325.6 pm . The value of d333 is · DEC 2011
ABC26PH1323 · How many atoms are there in an element packed in a fcc structure · JUNE 2012
ABC26PH0184 · The structure obtained when all the tetrahedral holes are occupied in a fee structure is of the type · 2012
ABC26PH1324 · The structure obtained when all the tetrahedral holes are occupied in a fee structure is of the type · JUNE 2012
ABC26PH1342 · A compound Ax By has a cubic structure with A atoms occupying all the corners of the cube as well as all the face center positions. The B… · JUNE 2014
ABC26PH1344 · A solid consisting of only X-atoms has a close-packed structure with X-X distance of 160 pm. Assuming it to be a closed packed structure of… · DEC 2014
ABC26PH1348 · In a cubic crystal, the plane [100] is equally inclined to the planes · JUNE 2016
ABC26PH1350 · Each void in a two dimensional hexagonal close-packed layer of circles is surrounded by · DEC 2016
ABC26PH1362 · The Miller index for the plane as shown in the figure and parallel to the c-axis, is · DEC 2019