General Knowledge Ultimate Cheat Sheet - NDA

Chapter 1: World Geography & Physical Features

World Geography forms a critical component of the NDA General Ability Test (GAT). Candidates must understand spatial distributions, physical landforms, and major hydrological features across continents.

Continents and Oceans

The Earth's surface consists of seven major continents and five oceans. Their hierarchy by spatial extent is crucial for quick-recall objective questions:

• Continents (by Area): Asia > Africa > North America > South America > Antarctica > Europe > Australia
• Oceans (by Size): Pacific Ocean > Atlantic Ocean > Indian Ocean > Southern Ocean > Arctic Ocean

Major Rivers and Mountain Ranges

Hydrographic and orographic systems determine major geographical zones globally:

• Nile River: Longest river in the world (6,650 km), located in Africa.
• Amazon River: Second longest (6,400 km) and largest by water volume, located in South America.
• Yangtze River: Longest river in Asia and third longest globally (6,300 km), flowing entirely within China.
• Himalayas: Highest mountain range globally, located in Asia, featuring Mt. Everest at \(8848\text{ m}\).
• Andes: Longest continental mountain range in the world, stretching across South America.
• Alps: Major mountain system of Europe.

Chapter 2: Indian Polity & Constitutional Framework

The Constitution of India provides the supreme legal framework of the republic. Questions in the NDA paper frequently emphasize constitutional articles, schedules, and emergency provisions.

Key Constitutional Articles

• Article 1-4: Covers the Union and its Territory, including the admission, establishment, or re-organization of states.
• Article 12-35: Enshrines Fundamental Rights guaranteed to Indian citizens.
• Article 36-51: Directive Principles of State Policy (DPSP), aiming to establish socio-economic democracy.
• Article 51A: Outlines Fundamental Duties added by the 42nd Amendment Act.
• Article 32: Right to Constitutional Remedies, referred to by Dr. B.R. Ambedkar as the "Heart and Soul" of the Constitution.
• Article 360: Financial Emergency provisions.

Schedules of the Constitution

There are 12 Schedules in the Indian Constitution. A key focus area for NDA is the 7th Schedule, which divides powers between the Union and States via three distinct lists:

1. Union List
2. State List
3. Concurrent List

Chapter 3: Modern Indian History & Freedom Movement

Modern Indian History primarily focuses on the period from the mid-19th century up to Indian independence in 1947, detailing the organized anti-colonial struggle.

Chronological Milestones

• 1857: The First War of Indian Independence (Sepoy Mutiny), marking the formal transition from East India Company rule to the British Crown.
• 1885: Formation of the Indian National Congress (INC) by A.O. Hume, with its first session presided over by W.C. Bonnerjee in Bombay.
• 1905: Partition of Bengal enacted by Viceroy Lord Curzon, giving birth to the Swadeshi Movement.
• 1920: Launch of the Non-Cooperation Movement under Mahatma Gandhi following the Jallianwala Bagh Massacre and Khilafat agitation.
• 1930: Civil Disobedience Movement initiated with the iconic Salt March (Dandi March) protesting salt taxes.
• 1942: Quit India Movement launched during WWII, featuring Gandhi's famous call to "Do or Die".
• 1947: Enactment of the Indian Independence Act, creating the sovereign dominions of India and Pakistan.

Chapter 4: Basic Science Essentials (Physics & Chemistry)

The General Science portion tests primary concepts in SI physical units, chemical compositions, and fundamental reactions.

Physics SI Units

• Force: Newton (\(\text{N}\) or \(\text{kg}\cdot\text{m}\cdot\text{s}^{-2}\))
• Work / Energy: Joule (\(\text{J}\) or \(\text{N}\cdot\text{m}\))
• Power: Watt (\(\text{W}\) or \(\text{J}\cdot\text{s}^{-1}\))
• Pressure: Pascal (\(\text{Pa}\) or \(\text{N}\cdot\text{m}^{-2}\))

Essential Chemistry Concepts

• pH Scale: Ranges from \(0\) to \(14\). A \(\text{pH} = 7\) denotes neutral solutions, \(\text{pH} < 7\) indicates acidic behavior, and \(\text{pH} > 7\) represents basic/alkaline solutions.
• Atmospheric Composition: Nitrogen accounts for approximately \(78\%\), while Oxygen accounts for roughly \(21\%\) by volume.
• Heavy Water: Chemically known as Deuterium Oxide ($D_2O$), used as a neutron moderator in nuclear reactors.

For example, the combustion reaction of methane in atmospheric oxygen is represented as:

$CH_4 + 2O_2 \to CO_2 + 2H_2O$

Physics Diagram: Barometric Pressure Calculation

Understanding pressure units requires visualizing liquid column height adjustments in a U-tube manometer or simple barometer under atmospheric equilibrium:

```tikz \begin{tikzpicture} \draw[thick] (0,3) -- (0,0) -- (1.5,0) -- (1.5,3); \draw[thick] (0.5,3) -- (0.5,1) -- (1.0,1) -- (1.0,3); \fill[blue!20] (0,0) rectangle (0.5,2.5); \fill[blue!20] (0.5,0) rectangle (1.5,1.5); \draw[<->, dashed] (1.8,1.5) -- (1.8,2.5) node[midway, right]{$h$}; \draw[->, thick, red] (1.2,3) -- (1.2,2) node[above=5pt]{$P_{atm}$}; ode at (0.25,0.5) {$\varrho$}; \end{tikzpicture} ```

Chapter 5: Economics, GDP Formulation & International Organizations

Macroeconomic metrics and international multilateral bodies frequently appear in current affairs and general awareness modules.

Gross Domestic Product (GDP)

GDP measures the monetary value of all final goods and services produced within a country's geographic boundaries during a specific period. The expenditure approach formula is expressed as:

\[GDP = C + I + G + (X - M)\]

Where:

• \(C\) = Private Consumption Expenditure
• \(I\) = Investment Expenditure by businesses
• \(G\) = Government Spending on goods and services
• \(X\) = Total Exports
• \(M\) = Total Imports
• \((X - M)\) = Net Exports

International Headquarters

Organization	Headquarters Location
United Nations (UN)	New York City, USA
World Health Organization (WHO)	Geneva, Switzerland
World Trade Organization (WTO)	Geneva, Switzerland
International Monetary Fund (IMF)	Washington D.C., USA
World Bank	Washington D.C., USA
UNESCO	Paris, France

NDA Exam Pattern & Chapter Weightage Analysis

Analyzing Previous Year Questions (PYQs) reveals a consistent distribution pattern in the NDA General Ability Test (GAT) paper. Geography and Modern History together account for over 40% of the non-science General Knowledge section.

• Modern History & Freedom Struggle: 8-12 Questions per session (Focus on post-1857 movements and British administrative policies).
• World & Indian Geography: 16-20 Questions per session (Focus on physical features, ocean currents, rivers, and atmospheric layers).
• Indian Polity: 4-8 Questions per session (High priority on Fundamental Rights, DPSP, and Constitutional Articles).
• Basic Science: 35-40 Questions combined across Physics, Chemistry, and Biology.

Frequently Asked Questions (People Also Ask)