Colonial Land Revenue: Permanent, Ryotwari and Mahalwari
What was permanent in the Permanent Settlement, and what did direct settlement with a ryot actually change? Compare colonial revenue system…
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Optional & Subjects
Articles in Optional & Subjects (22)
Constitutional Writs: Articles 32 and 226 Explained
Constitutional remedies depend on the right involved and the legal defect requiring correction. Understand how Articles 32 and 226 differ, …
Ocean Currents, Upwelling and Climate: A Conceptual Guide
Why can a sunny coast have cold water and rich fisheries? Understand how winds, rotation and density shape ocean circulation. This guide ex…
Fiscal, Revenue and Primary Deficits: Reading the Budget
A revenue surplus does not necessarily remove the need to borrow, and zero primary deficit does not mean zero debt. Learn how the three mai…
Ecosystem Energy Flow: Food Chains and Ecological Pyramids
Energy flow explains how producers support food webs and why higher trophic levels receive less energy. Learn how food chains differ from f…
Harappan Cities: Planning, Water and Archaeological Evidence
Harappan cities reveal organised settlement, skilled production and varied responses to water needs. This article explains what streets, re…
Plate Tectonics: Boundaries, Earthquakes and Mountains
Why do mountains, ocean trenches and earthquakes occur in belts? Learn how lithospheric plates move, how divergent, convergent and transfor…
CRISPR-Cas9 Gene Editing: How It Works and Its Limits
CRISPR-Cas9 is a programmable gene-editing system built from a guide RNA and a DNA-cutting protein. Learn how targeting and cellular repair…
Inflation in India: CPI, WPI and GDP Deflator
Inflation is not a single price rise. Learn how India’s CPI, WPI and GDP deflator differ in coverage, weights and purpose, how to read base…
Western Disturbances: Why North India Gets Winter Rain
Western disturbances are mid-latitude weather systems that bring much of northwest India’s winter rain and Himalayan snow. Learn how the we…
Soils of India: Types, Distribution and Key Features
India’s varied relief, climate and parent material create a wide range of soils. This guide compares the major soil groups, their regional …
Indian Monsoon Explained: Mechanism, Branches and Breaks
The Indian monsoon is a seasonal wind system that shapes rainfall across the subcontinent. Learn how it forms, why its two branches behave …