Question

Various material and their density are given in column A and B. Predict which of the substance will float on water. Density of water is $1{\text{g/cm}}^3$.
$$\begin{array}{cc}\text{Material}& \text{Density}({\text{g/cm}}^3\text{)}\\ \text{Ice}& \text{0.98}\\ \text{Sulphuric acid}& \text{1.84}\\ \text{Kerosene}& \text{0.80}\\ \text{Plastic}& \text{1.05}\end{array}$$

• A. Kerosene
• B. Ice
• C. Plastic
• D. Sulphuric acid

Answer 1

Answer: (A), (B)

The correct options are
A Kerosene
B Ice

$\bullet$ Density is defined as mass per unit volume of a substance.
$\bullet$ The substances which are lighter than water floats on its surface.
$\bullet$ The substances which are heavier than water sinks down in it.
$\bullet$ From the given data it is clear that the density of ice and kerosene are less than water. Thus, these two are lighter than water, and hence they will float.