Which one of the following has the least density at room temperature?
[amp_mcq option1=”Milk” option2=”Acetone” option3=”Red soil” option4=”Iron” correct=”option2″]
This question was previously asked in
UPSC Geoscientist – 2022
– Milk: Approx. 1.03 g/cm³ (slightly denser than water).
– Acetone: Approx. 0.79 g/cm³ (a lightweight organic solvent).
– Red soil: Bulk density varies greatly but is typically in the range of 1.2 to 1.6 g/cm³ or higher, depending on composition and compaction. Even the solid mineral components have densities around 2.6-2.7 g/cm³.
– Iron: Approx. 7.87 g/cm³ (a dense metal).
– Comparing these values, Acetone (0.79 g/cm³) has the lowest density.
– Different substances have different densities due to the mass of their constituent particles and how closely they are packed.
– Solids are generally denser than liquids, which are generally denser than gases, though there are exceptions (e.g., ice is less dense than water).