Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)

What is the energy gap between valence band and conduction band in crystal of insulators What is the energy gap between valence band and conduction band in crystal of insulators December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The correct statement regarding F – centre is (a) Electron are held in the voids of crystals (b) F – centre produces colour to the crystals (c) Conductivity of the crystrals increases due to F – centre (d) All Schottky defect generally appears in (a) NaCl (b) KCL (c) CsCl (d) all of these December [...]

The flame colours of metal ions are due to (a) Frenkel defect (b) Schottky defect (c) Metal deficiency defect (d) Metal excess defect The flame colours of metal ions are due to (a) Frenkel defect (b) Schottky defect (c) Metal deficiency defect (d) Metal excess defect December 17, 2020 Category: Uncategorised (JEE Advanced Physics by [...]

Schottky defect generally appears in (a) NaCl (b) KCL (c) CsCl (d) all of these Schottky defect generally appears in (a) NaCl (b) KCL (c) CsCl (d) all of these December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

If a non – metal is added to the interstitial sites of a metal then the metal becomes (a) Softer (b) Less tensile (c) Less malleable (d) More ductile If a non - metal is added to the interstitial sites of a metal then the metal becomes (a) Softer (b) Less tensile (c) Less malleable [...]

Schootky defects occurs mainly in electrovalent compounds where (a) Positive ions and negative ions are of different size (b) Positive ions and negative ions are of same size Schootky defects occurs mainly in electrovalent compounds where (a) Positive ions and negative ions are of different size (b) Positive ions and negative ions are of same [...]

Which one of the following crystals does not exhibiot frenkel defect (a) AgBr (b) AgCl (c) KBr (d) ZnS Which one of the following crystals does not exhibiot frenkel defect (a) AgBr (b) AgCl (c) KBr (d) ZnS December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Which defect cause decrease in the density of crystal (a) Frenkel (b) Schottky (c) Intersitial (d) F – centre Which defect cause decrease in the density of crystal (a) Frenkel (b) Schottky (c) Intersitial (d) F - centre December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The following is not a function of an impurity present in a crystal (a) Establishing thermal equilibrium (b) Having tendency to diffuse (c) Contributing to scattering (d) Introducing new electronic energy levels Certain crystals produce electric signals on application of pressure. This phenomenon is called December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM [...]

Due to frenkel defect, the density of ionic solids (a) Increases (b) Decreases (c) Does not change (d) Changes Due to frenkel defect the density of ionic solids (a) Increases (b) Decreases (c) Does not change (d) Changes December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,