Is it possible to cancel an agreement I have made to give away an apartment to my son, as a gift, because he has deceived me?

Yes, it is possible but it depends on circumstances. The conditions to cancel such an agreement should be checked, meaning, whether your son has deceived you, has treated you unlawfully, and whether you son has not changed his condition to the worse because of the gift (of an apartment).
In April 2015 the Family Court in Ashdod ruled the cancellation of a gift agreement signed by a widow who had been deceived by one of her seven sons to agree to give him her rights in an agricultural farm, without keeping her right to live there for the rest of her life. The Court ruled that there was fraud involved, that the widow/mother had been in a sensitive state at the time of signing, due to the death of one of her (other) children, and mistakenly thought that she was only allowing the son (for whom she signed the agreement) to make use of a part of the farm for storage, and nothing more.