water
if its pure lemon juice with no added sugar then it has no sugar in it. and most lemon juice are like that. its in lemon soft drinks and lemon cordials that add the sugars.
It is called denaturation
Because the chef added it to enhance the taste.
it turns red[first it was purple
YES
it fomes
Yes, baking powder reacts with lemon juice. It is similar to baking soda and viniegar. Baing soda is a base, and lemon juice is acidic. When mixed, CO2 is created.
carbon dioxide
Lemon juice contains citric acid which is acidic. Baking Soda contains mainly sodium bicarbonate. An acid plus a carbonate or bicarbonate produces Carbon Dioxide which will put a flame out and is the basis for one type of fire extinguisher.
When vanilla is added to lemon juice, it will create a sweet scent that attracts crickets. This will be a homemade mixture to rid of crickets.
The juice you buy for cooking usually doesn't have anything added, it's straight juice from lemons.