1. Which of the following melting ranges would be indicative of a relatively pure solid? (Multiple Choice: Only one answ

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1. Which of the following melting ranges would be indicative of a relatively pure solid? (Multiple Choice: Only one answer is correct, and only one answer can be selected) Which of the following melting ranges would be indicative of a relatively pure solid? (Multiple Choice: Only one answer is correct, and only one answer can be selected)
a. 91-96∘C
b.86-93 C
C 99-101C
D 85-92 C
2. You suspect a given substance, unknown X, to be either pure acetaminophen (melting point = 169°C) or pure 1,4-dihydroxybenzene (melting point = 172°C). Subsequently, you perform a mixed melting point analysis by making the following three samples that yield the results below:
· Unknow X alone yielded a melting range of 162-166°C
· Unknown X mixed in a 50/50 ratio with acetaminophen yielded a melting range of 165-168°C
· Unknown X mixed in a 50/50 ratio with 1,4-dihydroxybenzene yielded a melting range of 153-160°C
Given the data above, what is the identity of unknown X
(Multiple Choice: Only one answer is correct, and only one answer can be selected)
a. A mixture of acetaminophen and 1,4-dihydroxybenzene
b. Neither acetaminophen or 1,4-dihydroxybenzene
c. Acetaminophen
d. 1,4-Dihydroxybenzene
3.What is the predominant reason that p-toluic acid has a higher melting point than o-toluic acid?
(Multiple Choice: Only one answer is correct, and only one answer can be selected)
a. Symmetry
b. Surface Area
c. Polarity / Hydrogen Bonding
4. What is the predominant reason that 2-napthol has a higher melting point than naphthalene?
(Multiple Choice: Only one answer is correct, and only one answer can be selected)
a.Surface Area
b. Symmetry
c. Polarity / Hydrogen Bonding