Q13 / 180 · COMEDK 2013 · Chemistry

The flame colours of metal ions are due to

A
Frenkel defect
B
Schottky defect
C
metal deficiency defect
Correct answer
D
metal excess defect

Solution

The flame colours of metal ions are due to metal excess defect. The free electrons can be exited to higher energy levels giving absorption spectra and as a consequence their compounds are coloured.

Hence, the correct answer is option: 'D'.

More Solid State Questions

Which defect leads to decrease in the density of crystal?2023 (Memory Based)Stoichiometric defects
In a normal spinel type structure, the oxide ions are arranged in ccp, whereas tetrahedral holes are occupied by ions and of octahedral hole2023 (Memory Based)Ionic structure
has face centred structure with edge length equal to . The radius is2023 (Memory Based)Cubic system
Copper has face centred structure with edge length equal to . The radius is2023 (Morning Shift)Cubic system
In a normal spinel type structure, the oxide ions are arranged in ccp, whereas tetrahedral holes are occupied by ions and of octahedral hole2023 (Morning Shift)Cubic system
Which defect leads to decrease in the density of crystal?2023 (Morning Shift)Stoichiometric defects