Question

Flame photometry is based on the principle of

• A. Absorption spectroscopy
• B. Emission spectroscopy
• C. ESR spectroscopy
• D. IR spectroscopy

Hint:

Flame photometry:
- Based on emission spectroscopy.
- Used for analysis of Na, K, Ca, Li.
- Sample is atomized in a flame.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
This question tests knowledge of the principle of flame photometry.

Step 2: Detailed Explanation:
Flame photometry is based on the principle of emission spectroscopy (B).
In flame photometry, the sample is introduced into a flame.
The heat excites the atoms, which emit light at characteristic wavelengths.
The emitted light is measured to determine the concentration of elements (e.g., Na, K, Ca).
Other options:
- Absorption spectroscopy (A): Based on absorption of light.
- ESR spectroscopy (C): Electron Spin Resonance (used for radicals).
- IR spectroscopy (D): Based on absorption of infrared radiation.
Thus, flame photometry uses emission spectroscopy.

Step 3: Final Answer:
Thus, flame photometry is based on emission spectroscopy, which corresponds to option (B).
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