Quiz Nunc est bibendum(now let us drink
I hope that most people spotted the link to 'Whisky' (or even 'whiskey'. The link may be types of whiskey, brandnames, or in three cases just terms which include 'scotch'

1       What word means to end a rumour, by providing the facts? Scotch
2       What church instruments are the most frequently cited as being anti-social? Bells here in the UK there are frequent complaints about the sound of church bells, often by people who have chosen to move house to next door to a church
3       What name is commonly given to a cream biscuit where both the biscuit and filling are chocolate flavoured? Bourbon
4       Which East Sussex harbour is closest to Guildford? Rye
5       What pedants are exemplified by Mr Quelch, Dewey Finn, & Charles Edward Chipping ? Teachers Mr Quelch taught Billy Bunter, Dewey Finn was Jack Black in 'Rock School' & Mr Chipping was the title character in "Goodbye Mr Chips"
6       In memory of whom do (UK) barristers wear black robes? Queen Anne although some searches say Charles II, but I can't find a whisky by that name
7       What game is played mainly on one leg, and involves throwing a stone into numbered squares? Hop-scotch
8       What (in terms of this quiz) might be considered a large group of Scottish musicians? 100 Pipers
9       What song got to the top ten in 1971 for 'Greyhound' and was a number one hit in US for 'Three Dog Night'? Black And White
10       Whose name is attached to the highest mountain in N America? McKinley's The brand is actually spelled Mackinlay's
11       Which type of confectionery's primary ingredients are brown sugar and butter, although other ingredients such as corn syrup, cream, vanilla, and salt are part of some recipes? Butterscotch
12       What name is given to amounts of money paid gratis by government departments e.g. to charities, or, in the past, to students? Grants
13       Which Scottish island takes its name from the Norse for 'island of the deer', and has about 200 human inhabitants, and 5500 deer? Jura
14       What name is given to a savoury snack of a boiled egg, wrapped in sausage meat, rolled in breadcrumbs & deep fried? Scotch egg
15       Which clipper ship was damaged by fire in 2007 while undergoing maintenance? Cutty Sark
16       What was the pseudonym of the DJ Peter Walters Dingley? Johnny Walker
17       What name is given to fields used for growing rice and other semiaquatic crops? Paddies
18       Which actress was best known for playing Leela, the leather-clad barbarian warrior companion of the fourth Doctor in Doctor Who? Louise Jameson
19       What apparently (according to a song) wouldn't matter where it occurs, as long as it's not covered by a safety pin? Dimple "Baby's cheek, or baby's chin, seems to me it would be a sin, if it's always covered by a safety pin, where will the dimple be?"
20       Which commander of the Battle of the Somme and Passchendaele was one of the founders of the Legion? Earl Haig