Which island is the largest in the Hebrides?

Which island is the largest in the Bismarck Archipelago? What is the name of the largest island in the Solomon Islands? Which island is separated from the Asian mainland by the Strait of Malacca? Which island is part of the Svalbard archipelago? What is the world's largest island with no permanent residents? Which country is the only neighbor of Vatican City? Which countries share a border with Slovenia? Which country shares a border with only the United Kingdom?