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JEE Main
Exam
JEE Main
Subject
Chemistry
Chapter
Practical Chemistry

JEE Main · Chemistry · Practical Chemistry

The metal that produces red violet colour in the non-luminous flame...

The metal that produces red violet colour in the non-luminous flame is

Options

  1. AZn
  2. BAg
  3. CRb
  4. DPb

Correct answer

C. Rb

Step-by-step solution

Alkali metals and their salts impart a characteristic colour to flame. The reason for flame colouration is that the energy of the flame causes an excitation of the outermost electrons which on return to their original position give out the energy so absorbed in the visible region. So Rb gives a red-violet colour to the flame. Zn, Ag, Pb don’t show flame test as they have higher ionization energy so flame test is not possible.
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