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Which of the following statements about 3-bromo-1,1-dimethylcyclobutane are true?
I. It is saturated.
II. It is a planar molecule.
III. It has no ring strain

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Correct Answer: A. I only
3-bromo-1,1-dimethylcyclobutane structure
A saturated molecule is one where all the valences of the atoms are satisfied by single covalent bonds. In other words, there are no double bonds. Statement I is true.
A planar molecule is a flat one. In this case, we have two opposite corners in a tetrahedral shape. II is not true.
Ring strain is minimized in a cyclohexane and maximized in a cyclopropane, but it is always present in a cyclic molecule. III is not true. Thus the answer is A.
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