Is Zakat obligatory on money paid to a housing cooperative that has reached the nisab and on which a year has passed, knowing that it is in the cooperative's account and not in a personal account?

Zakat is obligatory on money designated for purchasing land if it reaches the nisab (minimum threshold) and a hawl (lunar year) passes over it, whether by itself or combined with other funds. This includes money held in the cooperative's account, as it is considered a deposit.