pH of set MTA is:: (A) 7.2, (B) 10.2, (C) 11, (D) 12
Answer is D. Mineral trioxide aggregate (MTA) is composed of tricalcium silicate, tricalcium aluminate, tricalcium oxide and silicate oxide.

Bismuth oxide is added to the mixture for radiopacity.
pH - 12.5 (when set).
Setting time is 2 hours 45 minutes.
Compressive strength—40 MPa (immediately after setting) which increases to 70 MPa after 21 days.