Passage VII
A carboxylic acid (CA) is a compound that contains a —COOH group. When a CA dissolves in H2O, it can dissociate, as shown below.
An atom's electronegativity (EN) indicates the atom's ability to attract electrons within a molecule (see Table 1). The presence of an electronegative atom in a CA, and the atom's proximity to the —COOH group, can affect the acidity of a CA.
Table 2 gives the pH of aqueous 1.00 M (mole per liter) CA solutions at 25°C. The CA in each solution is either an acetic acid or a propanoic acid (see Figure 1), where X and Y each represent an atom listed in Table 1.
38. Consider the structure below:
Based on Figure 1, if the CA with this structure were listed in Table 2, the atom represented by X would be:
Your Answer is
Correct Answer is J
Explanation
Corresponding to the structure diagram of propanoic acid in figure 1, X should correspond to the I atom in this question