silver - South Central - Buzzpoints App

Question

Some zinc-containing batteries use an unusual tetroxide of this element containing cations in the plus-one and plus-three oxidation states. For 10 points each:

[10m] Name this element whose plus-one cation is central in a diamine complex that precipitates out upon acting as an oxidizing agent. This element’s nitrate is used as a test for chloride ions.

ANSWER: silver [or Ag]

[10e] The formation of a “silver mirror” is a positive result in Tollens’ test, which distinguishes types of this functional group defined by a C–O double bond.

ANSWER: carbonyl [accept aldehyde or ketone]

[10h] Silver(I) (“silver one”) catalysts are a common choice for this reaction that starts with a diazoketone. This reaction’s ketene intermediate can undergo a two-plus-two cycloaddition to form a four-membered ring.

ANSWER: Wolff rearrangement [prompt on rearrangement]

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Summary


California	2025-02-01	Y	3	10.00	67%	33%	0%
Great Lakes	2025-02-01	Y	5	8.00	60%	20%	0%
Lower Mid-Atlantic	2025-02-01	Y	6	6.67	50%	17%	0%
Midwest	2025-02-01	Y	6	15.00	100%	50%	0%
North	2025-02-01	Y	3	10.00	67%	33%	0%
Overflow	2025-02-01	Y	5	10.00	60%	40%	0%
Pacific Northwest	2025-02-01	Y	2	20.00	100%	100%	0%
South Central	2025-02-01	Y	2	15.00	50%	100%	0%
Southeast	2025-02-01	Y	4	10.00	75%	25%	0%
UK	2025-02-01	Y	10	13.00	40%	70%	20%
Upper Mid-Atlantic	2025-02-01	Y	8	13.75	88%	50%	0%
Upstate NY	2025-02-01	Y	3	6.67	67%	0%	0%

Data


TAMU	Texas A	10	0	0	10
ASU	Texas B	10	10	0	20