The given structure HOCH\(_2\)(CH\(_2\))\(_3\)CH\(_2\)COCH\(_3\) has a hydroxyl group at position 7 and a ketone group at position 2 on the 7-carbon chain. Therefore, the IUPAC name is 7-hydroxyheptan-2-one.
Thus, the correct answer is (B).
x mg of Mg(OH)$_2$ (molar mass = 58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K. The value of x is ____ mg. (Nearest integer) (Given: Mg(OH)$_2$ is assumed to dissociate completely in H$_2$O)