Evidence, not adjectives
The prompts ask what you did and what changed because you did it, because that is what a reader is looking for. "Hard-working and passionate" appears on every application in the stack and distinguishes none of them.
Different documents, different jobs
A statement of purpose argues for a specific programme. A motivation letter argues for you. A CV is a record. Submitting one where another was asked for is a common and avoidable reason for rejection.
One page, until you have earned two
For a first application, one page is the format the reader expects. Two pages of thin record reads as padding rather than experience.