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In the context of solving pollution problems, what is/are the advantage/advantages of the bioremediation technique? 1. It is a technique for cleaning up pollution by enhancing the same biodegradation process that occurs in nature. 2. Any contaminant with heavy metals such as cadmium and lead can be readily and completely treated by bioremediation using microorganisms. 3. Genetic engineering can be used to create microorganisms specifically designed for bioremediation. Select the correct answer using the code given below:
By studying all following options, select a pair that uses most closely similar reasoning. a. Researchers have looked at the communication between different animals and found that meerkats have a series of alerts and calls that fail into two categories, greetings and alarms. Since we can be sure that this meerkat is not calling as a greeting, we must accept that he is attempting to raise the alarm. b. Farmers must choose between using organic or non-organic fertilisers on their land. Organic fertilisers can produce a lower crop yield and farmers may find it difficult to change to organic methods if they have been using non-organic methods for some time. Farmers should, therefore, consider the longer-term impacts of their decisions. c. Either young persons are getting cleverer each year or examinations are becoming easier for students to pass. Since there is very little evidence from IQ testing and other supposed benchmarks that young persons are more intelligent now than in the past, we must conclude that the examination system is easier for students today than it was in the past. d. Closed wood burning chulhas are a better way to cook your food than open fire chulhas. Closed wood burning chulhas are highly efficient, whereas the open fire of open fire chulhas loses a great deal of heat in the air. More people should, therefore, use closed wood burning chulhas in their homes.
Biodegradable wastes are less harmful pollutants to us than non-biodegradable wastes. Which of the following groups contains only biodegradable wastes?
The following sentences form a paragraph. The first and the last sentences of the paragraph are given. The rest of the sentences are numbered as P, Q, R and S. These four parts are not given in their proper order. Read the sentences and choose the alternative that arranges them in the correct order. 1. The problem of water pollution is rampant in all thickly-populated areas, especially urban conglomerates. P. Also, the Bhopal gas leak tragedy of December 2/3, 1984 was a consequence of the release of poisonous Methyl Isocyanate from the Union Carbide plant producing pesticides and insecticides. Q. The problem intensifies with the addition of pollutants in our waterways from any sources; radioactive wastes from factories, laboratories and hospitals; fallout from nuclear explosions domestic wastes from the cities and towns, chemical wastes from factories and industrial units, etc. R. No doubt water does possess a self-cleaning property, but there is a limit to it.  S. Persons with a higher DDT content in their fatty tissues are afflicted with brain tumour, higher blood pressure and malfunctioning of the liver. 6. Contemporary pessimism, however, goes far beyond this traditional worry about the state of affairs.
Which among the following are water pollutants? (a) pesticides (b) water discharged from water treatment plant (c) Human wastes (d) Food wastes
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: One of the best ways to reduce the amount of solid wastes is to reduce the consumption of raw materials. Reason [r]: Solid wastes are seldom generated when raw materials are converted to goods for consumpton
Non-hazardous solid wastes are the hazardous wastes which are excused from _________ regulations.
Which of the following statements is/are correct? 1. The earth is nearest to the Sun at Perihelion, which generally occurs on January 3. 2. The earth is farthest away from the Sun at Perihelion, which generally occurs on July 4. 3. The earth is farthest away from the Sun at Aphelion, which generally occurs on July 4. 4. The earth is nearest to the Sun at Aphelion, which generally occurs on January 3. Select the correct answer using the code given below:
Which of the statements is correct about the mechanism of the following reaction?
Basics of Organic Reaction Mechanism mcq question image
Order of reactivity of the following dienes X, Y and Z in Diels-Alder reaction is
Basics of Organic Reaction Mechanism mcq question image