B $1.2 gmL^{-1}$ is the correct answer.
Explanation:
Sulphuric acid solution used as an electrolyte in a lead accumulator has a density of 1.2 gmL^-1. It is equivalent to 38 percent sulphuric acid (by mass).
What is the density of solution of sulphuric acid used as an electrolyte in lead accumulator? (A) $1.5 \mathrm{gmL}^{-1}$ (B) $1.2 \mathrm{gmL}^{-1}$ (C) $1.8 \mathrm{gmL}^{-1}$ (D) $2.0 \mathrm{gmL}^{-1}$
What is the density of solution of sulphuric acid used as an electrolyte in lead accumulator? (A) $1.5 \mathrm{gmL}^{-1}$ (B) $1.2 \mathrm{gmL}^{-1}$ (C) $1.8 \mathrm{gmL}^{-1}$ (D) $2.0 \mathrm{gmL}^{-1}$