Question

Statement:
Coal is a homogeneous substance with a fixed chemical formula.
A.True
B.False

Answer 1

Hint: You realize the coal is the by-product, which means the leftovers buried deep from the vegetation hundreds of thousands or millions of years ago that had existed above ground. To understand the type of mixture of a compound, we should first understand the components in it.

Complete step by step answer:
Let’s first learn about homogenous mixture and heterogeneous mixture.
A homogenous mixture is a substance in which the composition is uniform and the appearance is the same throughout.
A heterogeneous mixture is a substance in which the composition is not uniform and the appearance is also different throughout the mixture.
We must all note that coal is only one of the steps in the production of fossil fuels. As a fuel source, peat which is the younger version of coal is also used in Northern Europe and Asia. It has been around for over 1000 years. You get different kinds of coal if you keep the peat in the field long enough and expose it to the proper temps and pressures. But if under similar times and stresses, you leave coal in the ground long enough-it will turn into crude oil and natural gas.
In a field or zone that tended to sink farther under, or filled over by other deposits of soil, there were all types of plants that had evolved and died over long periods. Then, once underground, the processes of decomposition and other chemical changes that occur contribute to coal production.
When we look into the composition of coal, coal contains carbon, hydrogen, sulfur, volatile impurities, and moisture. Also, the appearance is not the same throughout. As a result, coal is not a homogenous mixture, but it is a heterogeneous mixture.
Hence, the above statement is false

Note:
A homogenous mixture is also known as solutions because in any given sample, solution has the same proportion of its components. We cannot judge a homogenous mixture by just seeing it. A homogeneous mixture is also easy to confuse with pure material since both are uniform. The exception is that the substance's structure is still the same.