Question
18. Purity is a major factor in determining the type of coal used for energy. Which of the following types of coal are correctly paired with a description of its purity and common uso? a. Anthracite is considered the highest grade coal because it is almost pure carbon.and it is often used for domestic heating. b. Coking coal is most widely available and contains 60-86% carbon, which makes it ideal for use in coal power plants. c. Steam coal has a high carbon content with low amounts of impurities which makes it ideal for use in the steel industry. d. Lignite is the most mature and purest form of coal, and it is often used for large-scale power generation.
Answer
4.5
(146 Votes)
Ulysses
Master · Tutor for 5 years
Answer
The correct answer is 'A'.
Explanation
## Step 1The problem provides four descriptions of different types of coal: Anthracite, Coking coal, Steam coal, and Lignite. Each description includes the purity of the coal, its carbon content, and its common use.## Step 2Option (a) states that Anthracite is the highest grade of coal, with almost pure carbon, and it is commonly used for domestic heating. This is correct as Anthracite is indeed the highest grade of coal and is often used for heating due to its high carbon content.## Step 3Option (b) describes Coking coal as being widely available and containing 60-86% carbon, making it ideal for use in coal power plants. This is incorrect as Coking coal is not typically used in power plants but is used in the steel industry for producing coke, a high-carbon fuel.## Step 4Option (c) states that Steam coal has a high carbon content with low amounts of impurities, which makes it ideal for use in the steel industry. This is incorrect as Steam coal is not typically used in the steel industry but is used for generating steam to power turbines in power plants.## Step 5Option (d) describes Lignite as the most mature and purest form of coal, and it is often used for large-scale power generation. This is incorrect as Lignite is not the most mature and purest form of coal; it is the lowest grade of coal and is not typically used for large-scale power generation.