It is improbable, but not impossible. CBSE has a set pattern which they rinse and repeat every year. Barring a few surprises, they do not deviate much from the set pattern. If you spend day and night preparing according to the given pattern, it is possible to score 90%. However, if you have absolutely zero base to start from, I'm afraid one month won't be enough. Rome wasn't built in a day and success is never preceded by a short story.