List of top Environmental Sciences Questions

The monumental book ’Silviculture of Indian Trees’ is written by:
The process that results in a chemical becoming increasingly concentrated at successive higher trophic levels in a food web is referred to as:
Match List I with List II:
LIST I (Experiment)LIST II (Conclusion)
A. Photoelectric effectI. Ether medium does not exist
B. Michelson-MorleyII. Light is made up of photons
C. Stern-GerlachIII. Quantization of electronic orbit
D. Franck-HertzIV. Electron spin moment
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Cooking pans made from which of the following metals would need less heat to achieve a certain cooking temperature?
Organogenesis in humans takes place during:
Arrange the following soil horizons as they occur from top to bottom:
Horizons:
A. O horizon
B. A horizon
C. B horizon
D. E horizon
E. C horizon
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In sewage water, which of the following is expected to be present in the highest quantity (mg/L)?
Which of the following forest types occupies the largest area in India?
The rate of decrease of dissolved oxygen (\(L_t\)) with time \(t\) in a wastewater sample is directly proportional to the amount of oxygen present in the sample at time \(t\). The unit of rate constant \(k\) will be:
The publication ’The Future We Want’ is the outcome of:
Which of the following metal is bioaccumulative in nature but does not undergo biomagnification to cause adverse health effects?
Stratospheric ozone protects us from:
Arrange the following greenhouse gases in increasing order of their relative contribution to global warming:
Greenhouse gases:
A. CO2
B. N2O 
C. CFCs 
D. CH4
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In which of the following pairs of chemical species does sulfur (S) not have the same oxidation number?
Arrange the following II B (or 12) group elements in the increasing order of their Pauling electronegativities:
Elements:
A. Zn
B. Hg
C. Cd
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Which of the following were the characteristics of the prebiotic primitive Earth?
Characteristics:
  1. A. Presence of \( \text{CO}_2 \)
  2. B. Presence of \( \text{CH}_4 \)
  3. C. Presence of \( \text{H}_2\text{O} \) vapour
  4. D. Presence of \( \text{O}_2 \)
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It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:
A black body has a temperature of 2900 K. The wavelength of peak emission ($λ_{max}$) of the radiation emitted from it is approximately equal to:
Which of the following phosphate species does not exist in water?
Photochemical smog formation in ambient atmosphere requires:
A. Volatile hydrocarbon
B. Ozone
C. SO2
D. Sunlight Temperature
E. NOx
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The main limiting factors for both plants and animals on a global scale are:
A. Fire
B. pH
C. Temperature
D. Moisture
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Match List I with List II:
LIST I - Ecological ParametersLIST II - Unit of Measurement
A. Net primary productivityI. g/m2
B. Absorbed photosynthetically active radiationII. g/L
C. PhosphorusIII. Joules/area/year
D. Plant biomassIV. gC/area/year
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What will be the energy of 1 mole of photons having a wavelength of 200 nm?
Planck’s constant, \( h = 6.6 \times 10^{-34} \, \mathrm{Js} \) and Speed of light, \( c = 3.0 \times 10^8 \, \mathrm{ms^{-1}} \)
What will be the molar concentration of ammonium ion in a 100 ppb ammoniacal solution?
Island communities are a special case in community dynamics in which species makeup is driven by interaction between:
A. Predator abundance
B. Disturbance
C. Colonization
D. Extinction
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