Coal primarily comprises ________
A) rocks
B) crystals
C) inorganic matter
D) organic matter
Answer: D
You might also like to view...
Which of the following factors will increase in a rising parcel of air?
A. air temperature B. saturation vapour pressure C. mixing ratio D. relative humidity
Water is generally a good solvent for which of the following types of compounds?
A) ionic compounds B) polar compounds C) both a and b D) neither a nor b
____________________ is the name given to the natural nutrient enrichment of a shallow lake
Fill in the blanks with correct word
The minimum concentration factor necessary for profitable mining of an ore deposit depends on each of the following except
A. the metal's average concentration in a deposit. B. the mineral in which the metal of interest occurs. C. how the metal will be used once it is extracted from ore. D. the price of the metal being recovered.