Chemistry 8

Chemistry (Civil Service Examination), Questions and Answers, GK for UPSC, Bank PO & All Exams

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1. Which of the following substances are found in the beach sands of many parts of Kerala? [2006]
1. Ilmenite
2. Zirecon
3. Sillimanite
4. TungstenSelect the correct answer using the codes given below:

 
 
 
 

2. The final Agent Orange raid in Vietnam took place in 1970- areas have begun to bloom again. But 19 years after the war’s end, it seems plain that Agent Orange is kiIIing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds-is a crop of human miseries including cancers, miscarriages and birth defects-that may persist for decades.” [1995]
The offensive substance referred to in this quotation is:

 
 
 
 

3. Physico-chemical characteristics of water in water sources undergo changes due to [1996]

 
 
 
 

4. Consider the following: [2010]
1. Oxides of Hydrogen
2. Oxides of Nitrogen
3. Oxides of Sulphur
Which of the above causes/cause acid rain?

 
 
 
 

5. Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition? [2010]

 
 
 
 

6. Which one of the following fuels causes minimum environmental pollution? [1995]

 
 
 
 

7. Which one of the following is produced during the formation of photochemical smog? [2003]

 
 
 
 

8. Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given the lists: [1999]
List I
A. Diamond
B. Marble
C. Sand
D. Ruby
List II
1. Calcium
2. Silicon
3. Aluminium
4. Carbon

 
 
 
 

9. The water pollution in river is measured by the dissolved amount of [1998]

 
 
 
 

10. Assertion (A): Coal-based thermal power stations contribute to acid-rain.
Reason (R):. Oxides of carbon are emitted when coal burns. [2003]

 
 
 
 

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