Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(aromatic oxide, `sp^(3)d^(2)`, octahdral, minimum, Ferromagnetism, alkyl halide, ferrimagnetism decreases,`sp^(3)d`, pyramidal, maximum, increasing, aromatic hydride)
Q. Aromatic ether is prepared by heating ____with____.