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

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