Misc: Which pop duo had a hit in 1983 with 'Club Tropicana'?

Questions

If you put a raisin in a glass of---------- , it will keep floating to the top and sinking to the bottom.?

If you would like to make a ---------- happy, give him a horse-meat steak.?

In 1983, a Japanese artist made a copy of the Mona Lisa completely out of---------- .?

In---------- , six drops make a dash.?

In cooking, ---------- drops make a dash.?