Traditionally, a "7 and 7" consists of Seagram's Seven Crown (which is a blended Canadian whiskey) and 7up.
Rye whiskey.
grain
Because they are 7 more bottles
Seagrams 7 Crown is an American blended whiskey. It's ingredients include corn, rye and barley to name a few.
Henesy
Blended whiskey
This depends on the country.
The Last Drink of Whiskey - 1914 was released on: USA: 7 June 1914
Rare blended scotch whiskey
Manhattan Sorry, wrong... A Manhattan is whiskey, vermouth, and bitters. Scotch whiskey and 7-Up, which aren't typically mixed, is called a "Scotch & 7" to differentiate from the standard "7 and 7", which is Seagrams Seven Crown whiskey (or any whiskey) and 7-Up. Most Scotches are typically too "full bodied" to mix well with citrus drinks, but some people will even mix scotch and grape soda.
Yes, scotch whiskey is whiskey made in Scotland. You will notice that although there is good whiskey made in other countries, Ireland for example, the bottle will say what kind of whiskey it is : single, double malt, blend but not call it scotch.
Yes, since there are 7 calories from each gram of ethanol.