Question

1. The mass per unit volume of a
substance is called density.
(density
Arrange the following in order of
increasing density - air, exhaust
from chimneys, honey, water,
chalk, cotton and iron,
mass / volume).
Con​

Answer 1

Explanation:

IRON, HONEY, CHALK, WATER, COTTON , EXHAUST FROM CHIMNEYS , AIR

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Answer 2

Answer:

The mass per unit volume of a substance is called density. (Density = mass/volume) Arrange the following in order of increasing density - air, exhaust from chimneys, honey, water, chalk, cotton and iron. The increasing order of density is air < exhaust from chimney < cotton < water < honey < chalk < iron.

Explanation:

Honey and water are liquids but the mass of particles of honey is much higher and interparticle distances are much smaller than those in water. Therefore, the density of honey is much higher than that of water.

Both air and exhaust from chimney are gases. Due to larger interparticle distances in them, gases have lower densities than liquids. Now air contains only oxygen and nitrogen as the main constituents but exhaust from chimneys contains some heavies gases than oxygen and air. Therefore, the density of exhaust from chimney is expected be higher than that of air.

Chalk and iron are solids. But due to much smaller interparticle distances in them, their densities are much higher than those of liquids and gases. Now in iron, the particles are very closely packed but in chalk, the particles are less closely packed. Therefore, the density of iron is much higher than that of chalk.

Cotton is also a solid but it has number of holes in which air is entrapped. As a result,, the density of cotton is lower than other solids such as chalk and romandeven lower than that of water. However, the cotton particles are much nearly than most of the one chimneys gases. Therefore, the density of cotton is higher than that of chimney gases.

Thus, the overall order of increasing density: air, exhaust from chimneys, cotton, water, honey, chalk and iron.