Non-metals and their compounds

21.Which of the following is called brown coal
 
A. anthracite
 
B. bintumans
 
C. Coke
 
D. lignite
 
Option”D” is correct
22.Which is known as soft coal
 
A. Pete
 
B. lignite
 
C. anthracite
 
D. bintumans
 
Option”D” is correct
23.The initial stage of coal formation is
 
A. Pete
 
B. lignite
 
C. bintumans
 
D. anthracite
 
Option”A” is correct
24.common type of coal
 
A. anthracite
 
B. lignite
 
C. bintumans
 
D. Pete
 
Option”C” is correct
25.High grade coal is
 
A. Pete
 
B. lignite
 
C. anthracite
 
D. bituminous
 
Option”C” is correct
26.Which of the following is not a type of coal?
 
A. bitumen
 
B. lignite
 
C. Pete
 
D. dolomite
 
Option”D” is correct
27.Which of the following is the most harmful air pollutant?
 
A. ozone
 
B. hydrogen sulfide
 
C. carbon dioxide
 
D. carbon monoxide
 
Option”D” is correct
28.The polluting gas emitted from vehicles is mainly
 
A. Carbon dioxide
 
B. carbon monoxide
 
C. sulfur dioxide
 
D. Nitrogen oxide
 
Option”B” is correct
29.Which of the following pollutes the air the most
 
A. Carbon dioxide
 
B. carbon monoxide
 
C. sulfur dioxide
 
D. hydrocarbons
 
Option”B” is correct
30.Carbon monoxide poisoning mainly affects which of the following
 
A. to digestion
 
B. liver function
 
C. kidney function
 
D. oxygen carrying capacity of the blood
 
Option”D” is correct