Please refer to Assignments Class 11 Chemistry Environmental Chemistry Chapter 14 with solved questions and answers. We have provided Class 11 Chemistry Assignments for all chapters on our website. These problems and solutions for Chapter 14 Environmental Chemistry Class 11 Chemistry have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Environmental Chemistry Assignments Class 11 Chemistry
Question. Synthesis of ethanal commercially from which of the following reagent is the part of green chemistry?
(a) CH3CH2OH
(b) CH2 = CH2
(c) HC≡CH
(d) All of these
Answer
B
Question. Which among the following is bio – degradable pollutant?
(a) Lead compounds
(b) Mercuric salts
(c) Pesticides
(d) Domestic wastes.
Answer
D
Question. What is the main reason for thermal pollution?
(a) Increase in the temperature of the ecosystem
(b) Increase in the chemical contains in water
(c) Hot water released by power plants and industries
(d) Pollution causing by vehicles
Answer
C
Question. In Antarctica, ozone depletion is due to the formation of the following compounds
(a) Acroline
(b) Peroxy acetyl nitrate
(c) SO2 and SO3
(d) Chlorine nitrate
Answer
D
Question. Water sample is reported to be highly polluted if BOD (Biological Oxygen Demand) value of sample becomes
(a) more than 17 ppm.
(b) equal to 10 ppm.
(c) equal to 5 ppm.
(d) less than 5 ppm.
Answer
A
Question. Which among the following does not cause water pollution?
(a) Automoblie exhaust
(b) Plant nutrients
(c) Oxygen demanding wastes
(d) Disease causing agents.
Answer
A
Question. Who sediment of suspended matter occurs?
(a) When soil is eroded from the air
(b) When soil is eroded from the land
(c) When soil is eroded from the water
(d) When soil is eroded from the rock
Answer
B
Question. The pollutants released by jet aeroplanes in the atmosphere as fluorocarbons are called
(a) Photochemical oxidants
(b) Photochemical reductants
(c) Aerosols
(d) Physical pollutants
Answer
C
Question. Lung diseases are four times more in urban areas than rural areas. This is due to presence of which of the following in atmosphere?
(a) CO2
(b) SO2
(c) N2
(d) O2.
Answer
B
Question. A secondary pollutant is?
(a) O3
(b) CO
(c) CH4
(d) Pb
Answer
A
