Are you finding it challenging to grasp essential concepts for the UPSC Prelims? The examination increasingly evaluates your understanding of core ideas and their practical application, particularly in the dynamic fields of Science, Economy, and Environment (SEE).
In response to this need, UPSC Essentials has launched a new initiative called UPSC Prelims ‘SEE’ Snapshot. This program, available every Wednesday, offers a concise, exam-oriented review of vital concepts. Each article highlights three significant current themes from the domains of Science, Economy, and Environment, focusing specifically on the Prelims perspective—prioritizing clarity and conceptual understanding.
If you missed the previous edition of UPSC Prelims ‘SEE’ Snapshot, which discussed the induction cooktop, foreign exchange reserves, and the Earth’s energy imbalance as reported by the Indian Express, you can read it here.
The Council of Scientific and Industrial Research – National Chemical Laboratory based in Pune has pioneered a domestic process technology for the production of Dimethyl Ether (DME) through methanol dehydration. This development may allow DME to be blended with Liquefied Petroleum Gas (LPG) as an alternative clean fuel.
DME is a synthetic alternative fuel that can be utilized in specially designed diesel engines. Under standard atmospheric conditions, it appears as a colorless gas and is widely used in the chemical sector, aerosol propellants, solvents, fuels, and refrigerants.
The calorific value of DME is comparable to that of conventional fuels, and it operates with a similar thermal efficiency. It is recognized as a clean-burning fuel that produces low emissions and minimal particulate matter.
Notably, DME has been employed as an environmentally friendly aerosol propellant, replacing ozone-depleting chlorofluorocarbons (CFCs) and can also serve as a refrigerant. Furthermore, it plays a critical role as an intermediary in the synthesis of valuable chemicals such as lower olefins, dimethyl sulfate, and methyl acetate, potentially contributing to economic growth.
DME is classified as a ‘Second Generation fuel/bio-fuel’ and has a subtle ethereal scent. It can be liquefied under pressure (10 bar at 40°C), sharing properties similar to propane. Additionally, it is relatively inert, non-corrosive, non-carcinogenic, nearly non-toxic, and does not form peroxides upon prolonged exposure to air.
Given its physical and chemical characteristics, DME is a viable substitute or blending agent for LPG, indicating its suitability for use in household cooking and industrial applications.
It is important to note that methane does not directly convert to DME but acts as a precursor. Methane is first transformed into syngas (carbon monoxide and hydrogen), which is subsequently converted into methanol for DME production. Methane can be derived from both fossil fuels and renewable resources, making DME production versatile and future-ready.
LPG is recognized as a clean, portable, and efficient energy source. It is colorless and odorless, with a strong odorant added to facilitate leak detection. At standard temperatures, LPG exists as a gas but can be transformed into a liquid under moderate pressure or cooling, making it convenient for transport and storage.
As an energy-dense fuel, LPG possesses a higher calorific value per unit compared to other commonly utilized fuels.
The Ministry of Statistics and Programme Implementation (MoSPI) has recently published the updated Consumer Price Index (CPI) data based on a new base year of 2024, revealing a retail inflation rate of 2.75% for January. This modernization of CPI inflation, which serves as a crucial macroeconomic indicator for India, is part of a broader initiative to enhance the accuracy of the country’s official statistics.
Inflation signifies the rate at which the overall price levels for goods and services rise over time, diminishing the purchasing power of money or real income. Various methodologies exist for measuring inflation, including the Consumer Price Index, Wholesale Price Index (WPI), and GDP deflator, each highlighting distinct aspects of price fluctuations.
The Consumer Price Index (CPI) Inflation focuses on the prices of goods acquired by consumers, whether sourced domestically or imported.
CPI inflation represents a key economic metric in India, directly impacting the interest rates established by the Reserve Bank of India (RBI). The central bank is mandated to target a CPI inflation rate of 4% in the medium term, with a permissible range of 2-6%.
The formula for calculating inflation is given by ((CPI x+1 – CPI x) / CPI x) * 100, where CPI x denotes the CPI value in the initial/base year.
The latest CPI inflation data follows extensive efforts by the statistics ministry to update the base year from 2012 to 2024, reconstituting the consumption basket based on findings from the 2023-24 Household Consumption Expenditure Survey (HCES). This ensures that prices reflect current consumption trends rather than those from the 2011-12 survey.
The new CPI, with the base year updated to 2024, assigns a value of 100 for that year, with subsequent changes in price levels calculated to derive inflation rates for various goods and services.
This revised CPI basket now encompasses 358 goods and services, an increase from the previous 299 items. For the first time, it includes rural house rent, enhancing the representation of rural housing consumption.
The CPI 2024 series employs the Classification of Individual Consumption According to Purpose (COICOP) 2018, replacing the former structure of six broad categories: Food and beverages, Pan, tobacco and intoxicants, Clothing and footwear, Housing, Fuel and light, and Miscellaneous (services such as education and healthcare).
The CPI 2024 utilizes the latest classification framework developed by the United Nations Statistics Division. According to MoSPI, the revised structure organizes expenditures into 12 primary divisions, 43 groups, 92 classes, 162 subclasses, and ultimately 358 items at the most granular level.
As for the Wholesale Price Index (WPI), it serves as an alternative measurement of price changes…
