Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2013ChemistrySolid State

The flame colours of metal ions are due to

Options

  1. AFrenkel defect
  2. BSchottky defect
  3. Cmetal deficiency defect
  4. Dmetal excess defect

Correct answer

D. metal excess defect

Step-by-step 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.

Practice Solid State on Quantrex Academy →

More from Solid State

Which of the following defects is observed in steel? 2026A metal has a fcc structure if the edge length of unit cell is 200 pm, calculate the volume occupied by particles in a unit cell. 2026A metal crystallizes in a bcc unit cell having unit cell volume 2.5 10⁻²³ cm ^3 . Find the number of unit cells in 18 g metal if the density of metal is 7.2 g cm ⁻³ . 2026Calculate the density of an element having molar mass 225 g mol ⁻¹ forming bcc structure [a^3 N_A = 75 cm ^3 mol ⁻¹] 2026What is the coordination number of particle in simple cubic structure ? 2026Calculate the radius of atom of metal forming fcc unit cell having edge length 360 pm 2026In ionic solid, anions are arranged in hcp array and cations occupy 1 2 tetrahedral voids. What is the formula of ionic compound ? [Consider A = Cation ; B = anion] 2026Which of the following statements is true about schottky defect ? 2026 Full Solid State list All COMEDK PYQs