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13. Which pair of compounds is formed when 14. Ethanoic acid turns blue litmus red but
benzene and methyl benzene undergo ethanol does not, because ethanoic acid
nitration?
(A) has a polar − OH bond but ethanol
does not
(B) has a higher pka value than ethanol
(C) is a stronger acid than ethanol
(D) is more miscible with water than
ethanol

15. Which of the following statements about
aminoethanoic acid, NH2CH2COOH, is
NOT true?

(A) Its aqueous solution has a pH of 7
(B) It has a high melting point
(C) It is soluble in base only
(D) It is soluble in both acid and base

16. In an iron determination, a student obtains a
mean value of 35.50% for the iron content
and a standard deviation of 0.01. The
actual value for the percentage of iron in
the sample is 39.45. In terms of precision
and accuracy, which option best describes
the student’s results?

(A) High accuracy and high precision
(B) High accuracy and low precision
(C) Low accuracy and high precision
(D) Low accuracy and low precision

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02212010/SPEC/CAPE 2017