Solve this multiple-choice question and choose the correct option.

Home » General Knowledge » General Science

Fossil fuels (coal types): Identify the variety of coal whose deposits still show recognizable remains of the original plant material. Focus on the least mature stage of coal formation. Choose the correct variety.

Difficulty: Easy

Peat
Lignite
Bituminous coal
Anthracite

Correct Answer: Peat

Explanation:

Given data

Ask: Coal variety with visible plant remains.

Concept/Approach Coalification sequence: Peat → Lignite → Bituminous → Anthracite. Peat is the earliest stage, often fibrous with recognizable plant fragments.

Final Answer Peat

← Previous Question Next Question→

More Questions from General Science

Materials science (SiC): In which application is silicon carbide (SiC) commonly used? Consider its hardness, thermal stability, and electrical properties. Choose the correct application.
Solutions (solubility): Which of the following substances is the most soluble in water at room temperature? Compare typical solubilities of common salts. Choose the correct substance.
Solar spectroscopy (history of discovery): Which element was first discovered in the Sun’s chromosphere before being found on Earth? Identify the element detected during the 1868 total solar eclipse via a new spectral line. Choose the correct element.
Everyday chemistry: Soda water contains which dissolved gas under pressure? Focus on the fizzy constituent responsible for effervescence and tangy taste. Choose the correct gas.
Atomic structure (hydrogen): Which of the following is NOT an isotope of hydrogen? Recall the three isotopes of hydrogen and identify the odd one out. Choose the correct option.
Materials used in pencils: The writing core of ordinary pencils is made of which substance? Consider the soft, electrically conductive carbon form used for marking on paper. Choose the correct material.
Bioinorganic chemistry: Chlorophyll is a naturally occurring chelate in which the central metal ion is what? Identify the metal coordinated in the porphyrin-like ring of plant chlorophyll. Choose the correct metal.
Elemental classification: Bromine is best described as which of the following at room temperature? Consider both physical state and its classification in the periodic table. Choose the correct description.
Physical chemistry (water types): Heavy water is chemically what? Identify the correct formula/name used in nuclear reactors as a moderator. Choose the correct compound.
Water treatment (hardness): Permanent hardness of water can be removed by adding which chemical? Target the sulfate/chloride salts of Ca/Mg (non-carbonate hardness). Choose the correct reagent.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion