Each compound is determined:
a) It is a ketal, it has a central carbon, attached to two oxygen that in turn are in a chain.
b) It is a hemiacetal, a central carbon, attached to two oxygen, which has a chain and an H group.
c) It is an ether, a central oxygen atom, attached to two chains.
d) It is an ether, a central oxygen atom, attached to two chains.
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