Question

20.The physical quantity that differentiates one substance from another is called
(1 Point)
a Area
b Mass
c Density
​

Answer 1

Answer:

Mass

is the answer....

Answer 2

The physical quantity that differentiates one substance from another is called Density (option c).

Density (ρ) of a substance refers to the ratio of the distribution of mass in a particular volume of the substance.

It can be represented mathematically by the formula:

⇒      ρ  $= \frac{M}{V}$

where,

1. M is equal to the mass (of substance)
2. V is equal to the volume (of the substance).

• All substances found on the planet have different densities. This is because of the specific chemical properties are unique to each substance.

• Differing chemical properties may alter the arrangement or positions of the atoms of the substance, which means mass distribution in every substance is specific to itself.

• Area is a physical quantity depending on the dimension measurements of substances. Two substances can have the same dimensions and so can have the same area.

• Also, we can mend all substances into any desired area hence it isn't a factor appropriate to consider when differentiating between substances.

• Mass like area can be same for two substances. We can add or remove mass from substances to make them equal hence mass too is not the appropriate factor to consider for comparing two substances.

• Hence, the only physical quantity that can be used from the above options to differentiate between substances is density.

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