Question

In analyzers based on gas density, if the sample carries a gas having a higher density than the detector which of the following occurs?

(a) It will cause a net downward flow

(b) It will cause a net upward flow

(c) It splits into two beams

(d) There will be no difference in flow

I got this question in a national level competition.

Question is taken from Analysers Based on Gas Density in division Industrial Gas Analysers of Analytical Instrumentation

Answer 1

Right choice is (a) It will cause a net downward flow

The best I can explain: In analyzers based on gas density, if the sample carries a gas having a higher density than the detector it will cause a net downward flow. It will obstruct flow in the lower path.