Context and question: Zinc(I) compounds are rare, and require bulky ligands to stabilize the low oxidation state. Most zinc(I) compounds contain formally the [Zn2]2+ core, which is analogous to the [Hg2]2+ dimeric cation present in mercury(I) compounds. The diamagnetic nature of the ion confirms its dimeric structure. The first zinc(I) compound containing the ZnZn bond, (5-C5Me5)2Zn2, is also the first dimetallocene. The [Zn2]2+ ion rapidly disproportionates into zinc metal and zinc(II), and has only been obtained as a yellow glass formed by cooling a solution of metallic zinc in molten ZnCl2.
When a solution of metallic zinc is cooled in molten ZnCl2, what is formed?
Answer: yellow glass
Context and question: On 22 May 2015, Sun reporter Anthony France was found guilty of aiding and abetting misconduct in a public office between 2008 and 2011. France's trial followed the London Metropolitan Police's Operation Elveden, an ongoing investigation into alleged payments to police and officials in exchange for information. He had paid a total of more than 22,000 to PC Timothy Edwards, an anti-terrorism police officer based at Heathrow Airport. The police officer had already pleaded guilty to misconduct in a public office and given a two-year gaol sentence in 2014, but the jury in France's trial was not informed of this. Following the passing of the guilty verdict, the officer leading Operation Elveden, Detective Chief Superintendent Gordon Briggs said France and Edwards had been in a "long-term, corrupt relationship".
Who was responsible for Operation Elveden?
Answer: London Metropolitan Police
Context and question: Above the main portal there is generally a large window, like that at York Minster, or a group of windows such as those at Ripon Cathedral. In France there is generally a rose window like that at Reims Cathedral. Rose windows are also often found in the facades of churches of Spain and Italy, but are rarer elsewhere and are not found on the facades of any English Cathedrals. The gable is usually richly decorated with arcading or sculpture or, in the case of Italy, may be decorated with the rest of the facade, with polychrome marble and mosaic, as at Orvieto Cathedral.
What portion of Egyptian buildings are usually richly decorated with arcading or sculpture?
Answer:
unanswerable