Final answer:
The statement is false; a revocation of an offer is generally effective when received by the offeree, not when it is dispatched, according to the 'mailbox rule'.
Step-by-step explanation:
The statement, "T/F. A revocation normally is effective at the time it is dispatched by the offeror" raises a common question in contract law regarding the moment when a revocation of an offer becomes effective. According to the 'mailbox rule', which is an exception to the general rule of contract law, a revocation is typically only effective when it is received by the offeree. The 'mailbox rule' applies primarily to acceptances which are effective upon dispatch. Therefore, the statement as presented is false; a revocation is not normally effective at the time it is dispatched but rather when it has been communicated to and received by the offeree.