Which of the statements below is/are correct about emission?
I. All elements emit and absorb characteristic spectra. II. Spectral analysis is an important method of identifying environmental pollutants. III. The chemical composition of stars could be determined using spectral analysis. A. I, II and III B. II and III only C. I...Which of the transitions will produce the emission of highest frequency?
A. V B. IV C. III D. II Correct Answer: Option A – V
The diagram below illustrates the energy transitions of five electrons of an atom. Which of the transitions will produce the emission of longest wavelength?
A. I B. II C. III D. IV Correct Answer: Option A – I
Bohr’s atomic model proves most successful for the explanation of the… Which of the statements above is/are correct?
I. structure of the hydrogen atom; II. line spectra of the hydrogen atom; III. Multi-electron atoms. A. I only B. II only C. I and II only D. I and III only Correct Answer: Option C – I and II only
A point charge of magnitude 2μC is moved through a distance of 0.02 m against uniform field of intensity 25 Vm‾ ¹. Calculate the work done on the charge
A. 5.0 x 10^6J B. 1.0 x10^-6J C. 5.0 x10^-7J D. 1.0 x 10^-2J Correct Answer: Option B – 1.0 x10^-6JProducts
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