no
Orange would be the adjective.
there is no adjective in this sentence, an adjective describes a noun
Orange is the Adjective. Orange is the Adjective because, it modifies drink.
by taking a picture of the orange and slide it under the door or you can draw the orange a slide the picture under.
it can be, such as a slid car but primarily its a verb
Orange can be a noun: I want to eat the orange. Orange can also be an adjective: My calculator is orange.
Slide is a noun (a slide) and a verb (to slide).
As you are using the plural, that means you are talking about the fruit so here it is a plural noun. If you use 'orange' in the singular that could mean the fruit or the colour of the fruit. In the second case it would be an adjective.
you slide the back downwards
The word "orange" can be a noun (referring to the color or the fruit) or an adjective (describing something as orange in color).
radiant
Yes, juicy is an adjective (from the noun juice). Juicy is an adjective. Examples are "juicy orange" and "juicy gossip."