An offer shall be deemed to been
revoked in any of the following circumstances:
(a) If the offerer makes an offer with a condition that a
notice of acceptance to the offer be given within any
certain time, and the offerer does not receive a notice
of acceptance by the offeree within that time,
(b) If the time for sending a notice of acceptance is not
specified pursuant to clause (a) and the offeree does
not give a notice of acceptance to the offerer within a
reasonable time,
(c) If the offerer, after making the offer, dies or becomes
insane before receiving the acceptance,
(d) If the offer is revoked pursuant to Section 509,
(e) Even if the acceptance was given by the offeree, the
offeree dies or becomes insane before the offerer
receives the acceptance,
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(f) If the offeree sends a counter offer pursuant to subsection
(5) of Section 509,
(g) If the offerer makes an offer on a condition that the
offeree has to do any act or fulfill any condition before
accepting the offer, and acceptance is made without
doing such an act or fulfilling such a condition.