1.- It's hot in the room. - Yes. I'll open the window.
В комнате жарко. - Да. Я открою окно.
It isn’t hot in the room. (Negative).
Is it hot in the room? (General question).
Where is hot? (Special question).
Is it hot or is it cold in the room? (Alternative question).
Is it hot in the room or in the building? (Alternative question).
It's hot in the room, is not it? (Disjunctive question).
Shall I open the window? (General question).
Who will open the window? (Special question).
Shall I open or close the window? (Disjunctive question).