Entry Test MCQ :: Environmental Chemistry

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11.

Which of the following is not a condition for the formation of smog?

A.	sufficient NO	B.	sunlight
C.	less movement of air	D.	winds

12.

Incineration of muncipal waste is carried out in the temperature range of

A.	250 to 500?C	B.	500 to 900?C
C.	950 to 1300?C	D.	900 to 1000?C

13.

In which of the following layer of atmosphere there is more thickness of ozone layer?

A.	troposphere	B.	stratosphere
C.	mesosphere	D.	photosphere

14.

Which of the following is not primary pollutant

A.	SO3	B.	CO
C.	NO	D.	H2SO4

15.

Which of the following air pollutants is more dangerous for ozone layer?

A.	CFC	B.	CO2
C.	CO	D.	Oxides of nitrogen

16.

Which of the following gases is the main cause of acid rain?

A.	CO	B.	NO2
C.	both a & b	D.	none of the above

17.

Which statement is wrong?

A.	the amount of ozone layer is greater in the region close to the equator	B.	ozone acts as filter for UV radiations
C.	in the equatorial region it acts as pollutant	D.	CFCs play effective role in removing O3 in the stratosphere

18.

Which of the following factors help to measure quallity of water?

A.	DO	B.	BOD
C.	COD	D.	all of the above

19.

In the purification of portable water the coagulant used is

A.	alum	B.	nickel sulphate
C.	copper sulphate	D.	barium sulphate

20.

Newspaper can be recycled again and again how many times?

A.	2	B.	3
C.	4	D.	5