Environmental Issues - Online Test
Q1. Bioremediation of Phenol, one of the most common environmental pollutants is reported to be assisted by :
Answer : Option A
Explaination / Solution:
Bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants. Bioremediation of phenol is carried out using earthworms and bacteria.
Q2. Which of the following is not a radioactive isotope
Answer : Option B
Explaination / Solution:
Lead 207 Metal (Lead-207) is a stable (non-radioactive) isotope of Lead. It is both naturally occurring and a produced by fission.
Lead 207 Metal is one of over 250 stable Metallic isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications.
Lead Metal 207 additionally has special application in isotope dilution to measure lead levels in blood
Q3. The metal which is inert and when swallowed remains non-toxic but becomes severely toxic when inhaled in volatile form:
Answer : Option A
Explaination / Solution:
Mercury is inert and when swallowed remain non-toxic but becomes severely toxic when inhaled in volatile form. It enters the respiratory system and riches to lungs to cause lung cancer.
Q4. Which of the following can be categorised as a biological pollutant
Answer : Option D
Explaination / Solution:
Mildew is thin white coating consisting of minute fungal hyphae growing on woods, leather or paper. It is a biological pollutant. Heavy metal, industry wastes and organophosphates are physical components.
Q5. Fertilizers will not
Answer : Option A
Explaination / Solution:
Fertilizers will increase the fertility of soil and higher production of crop. When reaches to water bodies it causes eutrophication. The chemicals present in it also pollute the water. Fertilizer never acts as biological control against harmful organisms.
Q6.
ECOSAN (compost toilets) is about
(i) minimising unnecessary water use
(ii) household and personal hygiene
(iii) maximising recycling and reuse at domestic level of grey water
Answer : Option C
Explaination / Solution:
Ecological sanitation (Ecosan) is a concept that treats various types of waste generated by us as a resource which can be safely collected, treated and reused to prevent pollution of water bodies and the environment.
It minimize unnecessary water use, house hold and personal hygiene and maximizing recycling and reuse at domestic level of grey water.
Q7. The cultivation of a single cash crop in plantations or estates (large areas of land) on a large scale(in the whole year)is called plantational farming and example is/are
Answer : Option B
Explaination / Solution:
Plantation agriculture is a form of commercial farming where crops are grown for sale. Some crops are sold as raw materials to manufacturing industries or partially processed and value added before selling the products to large companies for further processing. Example of plantational farming is rubber plantation, tea plantation etc.
Q8. Potency of injury that can be caused by a radioactive isotope will not depend upon
Answer : Option A
Explaination / Solution:
Radioactive isotopes releases harmful radiations that may cause injury to health. Potency of injury will depends upon its rate of being absorbed or excreted, penetrating ability and its ionizing power and not on the place of availability.
Q9. The possible drawback of bioremediation method for oil spill containment is :
Answer : Option C
Explaination / Solution:
Bioremediation is a waste management technique that involves the use of organisms to neutralize pollutants from a contaminated site.
In this method large number of bacteria outcompete other organisms for oxygen creating a dead zone.Dead zones are low- oxygen, or hypoxic, areas in the world's oceans and lakes.
Q10. In which year did the scientists report largest ozone hole in the atmosphere?
Answer : Option A
Explaination / Solution:
From September 21 to 30, 2006 the average area of the ozone hole was the largest ever observed, at 10.6 million square miles. It is called as Antarctic ozone hole.
