Multiple choice

Which of the following is not true about a flame photometer?

  1. 25-lb gauge for oxygen supply and 10-lb gauge for fuel is generally used.

  2. The flow rate of fuel-oxygen mixture usually varies from 2 to 10 cu. ft/h.

  3. An atomizer should have a tip of suitable shape to avoid a strike back.

  4. In flame photometry atoms in vapour state give line spectra and not band spectra.

  5. The usual glass or gelatin absorption filters have wide spectral bandwidths, of 35-45 nm.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This answer is correct as the given statement is wrong because it is the burner and not the atomiser who should have a tip of suitable shape to produce symmetrical flame and homogeneous flow and distribution of gases, in order to avoid a strike back in the burner from accidental fluctuations in the feed system.

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