List of top Environmental Management Questions

An agricultural land can support energy crops yield to produce 7000 L of bioethanol per hectare and energy content of bioethanol is 21 MJ/L. This bioethanol displaces fossil-based petrol.

The \(CO_2\) offset potential of land used for growing energy crops as a bioethanol feedstock is ______ \(\times 10^6\) g of \(CO_2\)/hectare (rounded off to one decimal place).

Consider \(CO_2\) footprints of 10 g and 80 g of \(CO_2\) per MJ for bioethanol and petrol, respectively.
Which of the following options is/are directly associated with the steps involved in carrying out life cycle assessment (LCA)?
Which ONE of the following options CORRECTLY matches the ISO series with their usages in environmental management system (EMS) given in the table?
ISO SeriesEnvironmental Management System
(P) ISO 14001(i) Environmental labeling
(Q) ISO 14020(ii) Evaluation of environmental management system
(R) ISO 14040(iii) Addressing environmental aspects of products
(S) ISO 14060(iv) Life cycle assessment procedure
Which factor primarily controls the volatilization of organic pollutants from soil and water surfaces?
Which long-term environmental effect is most strongly linked to excessive phosphorus discharge into water bodies?
Which gas is primarily responsible for the corrosion of metals and monuments in polluted urban environments?
Which pollutant is mainly responsible for thermal inversion-related smog episodes in urban areas?
Which waste management option is most effective for reducing greenhouse gas emissions from organic solid waste?
Temporary hardness of water is mainly caused by the presence of
Excessive use of nitrogenous fertilizers in soil can directly lead to
A water sample shows high COD but relatively low BOD. This indicates the presence of
Which process in the hydrologic cycle directly contributes to groundwater recharge?
Which pollutant reduces atmospheric visibility by light scattering, contributing to haze formation?
Minamata disease is caused due to long-term exposure to
Which greenhouse gas has very high heat-trapping ability per molecule, but is present in the smallest amount in the atmosphere?
The tropopause is characterized by
Which gas contributes most to the natural greenhouse effect?
Sludge bulking in an activated sludge process is mainly due to
Sloughing in trickling filters usually results in
Which of the following is a secondary air pollutant?
High concentration of nitrates (\(>45\ \mathrm{mg/L}\)) in drinking water causes
For the removal of sub-micron particulate matter (\(<1~\mu\mathrm{m}\)) from flue gases, which of the following devices generally provides the highest collection efficiency?
Arrange the following devices in increasing order of particulate collection efficiency for fine particles: \[ \begin{aligned} A.&\ \text{Gravity settling chamber} B.&\ \text{Cyclone separator} C.&\ \text{Electrostatic precipitator} \end{aligned} \]
In water and wastewater analysis, Kjeldahl nitrogen (TKN) represents the sum of
A high Sludge Volume Index (SVI) in an Activated Sludge Process (ASP) indicates