Line spectrum of sodium contains _ colored lines separated by a definite distance
Correct answer: B. two yellow
- A. one yellow
- B. two yellow
- C. two brown
- D. two golden
Explanation
Sodium emits two yellow lines in its line spectrum, known as the D1 and D2 lines. These lines are very close in wavelength (~589.0 nm and 589.6 nm). The separation is small but definite, giving the characteristic sodium doublet
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Analytical chemistry identifies and measures substances using separation and instrumental methods. Chromatography is studied through stationary and mobile phases, retention and Rf values, while spectroscopy connects absorption of electromagnetic radiation with molecular structure and supports qualitative and quantitative analysis through techniques such as UV-visible and infrared spectroscopy.
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