QUESTION 30 Which statement best explains the toxicity of trivalent lanthanide cations to plant life O The lanthanide ion replaces calcium in the oxygen evolving centre and the resulting hydroxide intermediate is not sufficiently nucleophilic to attack the transient manganyl(v) species in the S4 state O The lanthanide ion replaces calcium in the oxygen evolving centre and the resulting aqua intermediate is not sufficiently acidic to generate a hydroxide intermediate O The lanthanide coordinates to pheophytin disrupting the electron transport chain O The lanthanide ion replaces magnesium in the P680 causing a shift in its redox potential O The lanthanide cation precipitates chloride from the active site of the oxygen evolving centre

QUESTION 30 Which statement best explains the toxicity of trivalent lanthanide cations to plant life O The lanthanide ion replaces calcium in the oxygen evolving centre and the resulting hydroxide intermediate is not sufficiently nucleophilic to attack the transient manganyl(v) species in the S4 state O The lanthanide ion replaces calcium in the oxygen evolving centre and the resulting aqua intermediate is not sufficiently acidic to generate a hydroxide intermediate O The lanthanide coordinates to pheophytin disrupting the electron transport chain O The lanthanide ion replaces magnesium in the P680 causing a shift in its redox potential O The lanthanide cation precipitates chloride from the active site of the oxygen evolving centre

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter20: Organic Chemistry

Section: Chapter Questions

Problem 28E: Acetylene is a very weak acid; however, it will react with moist silver(I) oxide and form water and...

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