1. Reverse Transcriptase Polymerase Chain Reaction is an analytical procedure used in detection of pathogenic microorganisms. Which one of the following statements is NOT correct in this context?
(A) It is used for identifying presence or absence of specific RNA in samples.
(B) It is used only for identifying Corona Viruses, including SARS CoV2 in samples.
(C) It cannot differentiate between viable and inactivated viruses.
(D) It is based on conversion of RNA to DNA followed by DNA amplification.
2. Which one of the following statements is correct regarding Global warming?
(A) Water vapour does not contribute to global warming.
(B) Global warming is likely to increase the productivity of plants due to CO2 fertilization.
(C) CFCs do not cause global warming, but can cause ozone layer depletion in stratosphere.
(D) HFCs and HCFCs are good substitutes for the ozone depleting substances as they
cause neither global warming nor ozone layer depletion.
3. In context of ecosystems, which one of the following is NOT a correct statement?
(A) The growth of an organism such as a plant may be dependent on a number of different factors such as sunlight, mineral nutrients (nitrates, phosphates, etc.), etc. Liegib’s law states that, growth occurs at the rate permitted by the most limiting factor.
(B) The carrying capacity of a population is determined by its limiting resources. Carrying capacity is the upper limit of an ecosystem up to which it can provide the basic needs to the population under given circumstances.
(C) The Ramsar convention on lakes and backwater systems of International importance is an international treaty for the conservation and sustainable use of lakes and backwater systems. The treaty was signed in 1981 and became effective in 1985.
(D) A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants and fungi
4. If G represents Gibbs free energy, select the correct statement(s)
(A) If ΔG = 0, reaction will proceed only in one direction
(B) If ΔG = 0, reaction will be in equilibrium
(C) If ΔG < 0, reaction will proceed forward
(D) If ΔG > 0, reaction will not proceed forward
5. For effluents generated by a molasses based distillery and wood based pulp and
paper industry, which of the following statement(s) is/are NOT correct?
(A) Both the effluents have dark colour.
(B) Both the effluents have high toxicity.
(C) Both the effluents generally have BOD greater than 15,000 ppm.
(D) Both the effluents have high pH
6. PM2.5 concentrations in ambient air can be measured using
(A) Beta attenuation method
(B) Chemiluminescence method
(C) Gravimetric method
(D) Non dispersive infrared spectroscopy method
7. Biodegradable wastes like vegetable peelings from kitchen are usually processed
by composting techniques. Which of the following option(s) regarding the processing of biodegradable wastes is/are correct?
(A) Vermi-composting is relatively faster than windrow composting, however vermicomposting is not frequently used on large commercial scale.
(B) The windrow height should be as short as possible as large windrow height may cause compaction due to the self-weight.
(C) The windrow height should be as large as possible as that will help to ensure appropriate temperature within the windrow.
(D) Earthworms facilitate the growth of microorganisms and break down complex organic molecules to simpler ones using enzymatic secretions.
8. As per ‘Hazardous and Other Wastes (Management and Transboundary Movement) Rules, 2016 of Govt. of India, the import of hazardous and other wastes from any country shall NOT be permitted for which of the following option(s)?
(A) Recovery, reuse and recycle
(B) Disposal in abandoned mines
(C) Safe disposal in engineered landfills
(D) Utilization, including co-processing
9. The Ministry of Environment, Forest and Climate Change (MoEF&CC), Govt. of India has published the Environment Impact Assessment (EIA) draft Notification 2020, intended to replace the existing EIA Notification, 2006 under the Environment (Protection) Act, 1986. Which of the following is/are the key change(s) from existing regulation?
(A) Removal of several project/ activities from the purview of public consultation.
(B) A list of projects has been included under Category B2, expressly exempted from the requirement of an EIA.
(C) All the project related activities are brought under the purview of necessary public consultation.
(D) A list of projects has been included under Category B2, bringing them under the
requirement of detailed EIA
10. Which one of the following statements is NOT correct with respect to a batch reactor?
(A) No reactant is added after the reactor has started operation.
(B) No product is withdrawn during the course of the reactor operation.
(C) The reactor operates under steady state.
(D) The reactor operation is carried out for a pre-specified duration.
4.(B) If ΔG = 0, reaction will be in equilibrium
(C) If ΔG < 0, reaction will proceed forward
(D) If ΔG > 0, reaction will not proceed forward
5.(B) Both the effluents have high toxicity.
(C) Both the effluents generally have BOD greater than 15,000 ppm.
(D) Both the effluents have high pH
6.(A) Beta attenuation method
.(C) Gravimetric method
Learn more: Air Quality standard and Methods of Measurement
7. (A) Vermi-composting is relatively faster than windrow composting, however vermicomposting is not frequently used on large commercial scale.
(D) Earthworms facilitate the growth of microorganisms and break down complex organic molecules to simpler ones using enzymatic secretions.
8. (B) Disposal in abandoned mines
(C) Safe disposal in engineered landfills
9.(A) Removal of several project/ activities from the purview of public consultation.
(B) A list of projects has been included under Category B2, expressly exempted from the requirement of an EIA.
10. (C) The reactor operates under steady state.
