Chemistry - Complete s-block Question with Solution | TestHub
ChemistryComplete s-blocks-block IAEasy2 minQB
ChemistryEasymultiple choice
Within the usual school-level trend for alkali metals and their practical use in photoelectric cells, which statement(s) is/are correct?
Options:(select one or more)
Answer:
A, C, D
Solution:
The heavier alkali metals have low work functions, so visible light of sufficient frequency can cause photoemission.
Rubidium can emit photoelectrons, so B is false.
Lithium has a higher work function and is less suitable for practical cells
this does not mean lithium can never show a photoelectric effect.
Work function concerns emission from a solid surface
ionisation enthalpy concerns a gaseous atom.
They are related trends, not the same quantity.
Options A, C and D are correct in the stated trend.
Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:s-block IA
⏱ 2mℹ️ Source: QB
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