In the Constitution of India, the word 'Federal' is used in

1. Comparative Models: Federal vs. Unitary Systems (basic)

At the heart of constitutional design lies a fundamental question: Where does power reside? Political scientists answer this by categorizing governments into two primary models—Unitary and Federal—based on the relationship between the national (central) government and regional (state/provincial) governments Indian Polity, M. Laxmikanth, Chapter 14, p.137.

In a Unitary system, all powers are concentrated in the hands of the national government. If regional governments exist, they are merely administrative arms of the center, deriving their authority entirely from it. The central government can, at any time, expand or abolish their powers. In contrast, a Federal system is an institutional mechanism designed to accommodate two sets of polities—one at the national level and one at the regional level Indian Constitution at Work, NCERT Class XI, Chapter 7, p.154. Here, the power is not gifted by the center; rather, both levels derive their authority directly from a Written Constitution. This makes them autonomous in their respective spheres, and the center cannot simply order the state to do something outside its constitutional domain Democratic Politics-II, NCERT Class X, Chapter 2, p.15.

To visualize these differences clearly, let's compare their structural features:

While these are "pure" types, modern constitutions often blend them. The essential consensus among scholars is that for a system to be called federal, it must at least possess Dual Government and a constitutional distribution of powers that cannot be changed unilaterally by one level Introduction to the Constitution of India, D. D. Basu, Chapter 5, p.58.

Sources: Indian Polity, M. Laxmikanth, Chapter 14: Federal System, p.137; Democratic Politics-II, NCERT Class X, Chapter 2: Federalism, p.15; Indian Constitution at Work, NCERT Class XI, Chapter 7: Federalism, p.154; Introduction to the Constitution of India, D. D. Basu, Chapter 5: Nature of the Federal System, p.58

2. Salient Features: Indian Federalism with Unitary Bias (intermediate)

To understand Indian Federalism, we must first look at Article 1 of the Constitution, which describes India as a 'Union of States'. Unlike the American federation, the Indian federation is not the result of an agreement among sovereign states, and significantly, no state has the right to secede from the union. This sets the stage for what we call a 'Federal System with Unitary Bias'—a structure where power is divided between the Centre and States, but the scales are intentionally tilted toward the Centre to ensure national integrity D.D. Basu, Nature of the Federal System, p.59.

The Indian Constitution is a unique blend. In normal times, it functions as a federal system with a dual polity, written constitution, and an independent judiciary. However, it possesses several unitary features that allow the Central government to exercise overarching control. For instance, the power to appoint Governors, the existence of All-India Services (IAS/IPS), and a single unified citizenship are all departures from traditional federalism found in countries like the USA M. Laxmikanth, Federal System, p.139. This flexibility is most evident during Emergencies (Part XVIII), where the federal structure can virtually transform into a unitary one without a formal constitutional amendment—a feature D.D. Basu describes as a "remarkable achievement" D.D. Basu, Outstanding Features, p.49.

Because of this unique mix, constitutional experts have used various labels to describe the Indian system. K.C. Wheare famously termed it 'quasi-federal', suggesting it is a unitary state with subsidiary federal features rather than a federal state with unitary features. On the other hand, Granville Austin called it 'cooperative federalism', highlighting the interdependence between the levels of government M. Laxmikanth, Salient Features, p.29. Ultimately, as Dr. B.R. Ambedkar noted, the system is designed to be both federal and unitary according to the requirements of time and circumstances.

Sources: Introduction to the Constitution of India, D. D. Basu (26th ed.), Nature of the Federal System, p.59; Indian Polity, M. Laxmikanth (7th ed.), Federal System, p.139; Introduction to the Constitution of India, D. D. Basu (26th ed.), Outstanding Features of our Constitution, p.49; Indian Polity, M. Laxmikanth (7th ed.), Salient Features of the Constitution, p.29

3. The Preamble: Sovereignty and Identity (basic)

The Preamble serves as the "identity card" of the Constitution, capturing the essence of India’s political philosophy. One of its most profound declarations is that India is a Sovereign state, meaning it is an independent authority, not subject to any external power. However, when we look at how this sovereignty is structured internally, we find a unique design. While the Constitution contains all the hallmarks of a federal system—such as a division of powers and an independent judiciary—the word 'Federal' or 'Federation' is strikingly absent from the Preamble and the entire text of the Constitution itself Indian Polity, Chapter 4: Salient Features of the Constitution, p. 29.

Instead of calling it a federation, Article 1 describes India as a 'Union of States'. This was a deliberate choice by the Constituent Assembly. Dr. B.R. Ambedkar explained that the term 'Union' was preferred over 'Federation' for two critical reasons: first, the Indian federation is not the result of an agreement among independent states (unlike the American model); and second, the states have no right to secede from the federation. This ensures that while India is federal in form (having states with their own governments), it remains unitary in spirit to protect national integrity Introduction to the Constitution of India, Chapter 5: NATURE OF THE FEDERAL SYSTEM, p. 59.

The legal status of the Preamble has evolved through landmark judicial interpretations. Initially, there was debate over its authority, but in the LIC of India case (1995), the Supreme Court firmly held that the Preamble is an integral part of the Constitution Indian Polity, Chapter: Preamble of the Constitution, p. 47. It acts as a guiding light for interpreting the rest of the document. Although the 42nd Amendment Act of 1976 added terms like 'Socialist', 'Secular', and 'Integrity' to the Preamble, the fundamental identity of India as a permanent 'Union' remains the bedrock of our constitutional structure Indian Constitution at Work, Chapter: CONSTITUTION AS A LIVING DOCUMENT, p. 210.

Sources: Indian Polity, Salient Features of the Constitution, p.29; Introduction to the Constitution of India, NATURE OF THE FEDERAL SYSTEM, p.59; Indian Polity, Preamble of the Constitution, p.47; Indian Constitution at Work, CONSTITUTION AS A LIVING DOCUMENT, p.210

4. Judicial Interpretation: Federalism as 'Basic Structure' (exam-level)

When you read the Indian Constitution from cover to cover, you will notice a curious omission: the word 'Federal' is never actually used. Instead, Article 1 describes India as a 'Union of States'. This was a deliberate choice by the framers to signal that our federation was not formed by a voluntary agreement between sovereign states, and therefore, no state has the right to secede from the Union. Introduction to the Constitution of India, D. D. Basu, Chapter 5, p. 59.

For many years, scholars debated whether India was truly federal or merely "quasi-federal." This debate was largely settled by the judiciary. In the landmark S.R. Bommai case (1994), the Supreme Court categorically ruled that Federalism is a 'basic feature' of the Constitution. The Court clarified that even though the Centre holds greater power in our system (a 'unitary bias'), the States are not mere appendages or subordinates of the Centre. Both the Union and the States derive their independent authority directly from the Constitution. Indian Polity, M. Laxmikanth, Chapter 13, p. 142.

To understand why the Court views it as federal, we look at the functional pillars present in our system: a written Constitution that is supreme, a clear division of powers (via the Union, State, and Concurrent Lists), and an independent judiciary to act as an arbiter. While we have an integrated judiciary and shared machinery for elections and audits, the core distribution of legislative and executive power ensures that the federal spirit remains intact. Democratic Politics-II, NCERT Class X, Chapter 2, p. 16.

Sources: Introduction to the Constitution of India, D. D. Basu, Chapter 5: Nature of the Federal System, p.59; Indian Polity, M. Laxmikanth, Chapter 13: Federal System, p.142; Democratic Politics-II, NCERT Class X, Chapter 2: Federalism, p.16

5. Constitutional Amendment: Article 368 and Federal Provisions (intermediate)

In the study of any democracy, the amendment process is the litmus test of its character. Our Constitution makers, led by Dr. Ambedkar, sought a middle path between the rigidity of the American Constitution (which is very hard to change) and the flexibility of the British system (where Parliament is supreme). Article 368 in Part XX of the Constitution provides the framework for this balance, granting Parliament the constituent power to add, vary, or repeal any provision D. D. Basu, Procedure for Amendment, p.193.

While India is described as a 'Union of States' rather than a 'Federation' to ensure national integrity, the Supreme Court has recognized federalism as a part of the 'basic feature' of our Constitution. Because of this, certain parts of the Constitution that define the relationship between the Centre and the States cannot be changed by Parliament alone. These are known as Federal Provisions. For these specific provisions, the amendment bill must not only be passed by a special majority in both Houses of Parliament but also be ratified by the legislatures of at least half of the states by a simple majority D. D. Basu, Procedure for Amendment, p.192.

It is important to note that unlike the United States, where states can initiate amendments, in India, the power to initiate a Constitutional Amendment Bill lies exclusively with the Union Parliament D. D. Basu, Procedure for Amendment, p.193. Additionally, there is no provision for a joint sitting of both Houses if there is a deadlock over an amendment bill. Once the bill is passed through the prescribed process and reaches the President, he must give his assent; he cannot withhold it or return the bill for reconsideration.

Sources: Introduction to the Constitution of India, D. D. Basu (26th ed.), Procedure for Amendment, p.191-196; Indian Polity, M. Laxmikanth (7th ed.), Salient Features of the Constitution, p.29

6. Article 1: India as a 'Union of States' (exam-level)

Article 1 of our Constitution begins with a powerful declaration: "India, that is Bharat, shall be a Union of States." You will notice something very interesting here—the word 'Federation' is not used anywhere in the text of the Constitution, including the Preamble and the amendment procedures Laxmikanth, M. Indian Polity, Federal System, p.138. While India possesses all the traditional hallmarks of a federation, such as a written constitution and a clear division of powers, the framers chose 'Union' to emphasize the unique nature of our political structure.

According to Dr. B.R. Ambedkar, the phrase 'Union of States' was preferred over 'Federation of States' for two fundamental reasons. First, unlike the American model, the Indian Federation is not the result of an agreement among sovereign states to come together. Second, because the states did not create the union, they have no right to secede from it. This makes the Indian system an "indestructible Union of destructible states," meaning that while the Parliament can redraw the map or change state boundaries, no state can break away from the country Laxmikanth, M. Indian Polity, Federal System, p.140.

It is also vital to distinguish between the 'Union of India' and the 'Territory of India'. The 'Union' includes only the states that share power with the Centre. However, the 'Territory of India' is a much broader term that encompasses: (1) Territories of the states, (2) Union territories, and (3) Any territories that may be acquired by the Government of India in the future Laxmikanth, M. Indian Polity, Union and Its Territory, p.49. This ensures the Constitution remains flexible enough to incorporate new lands without requiring a major structural overhaul.

Sources: Laxmikanth, M. Indian Polity, Federal System, p.138; Laxmikanth, M. Indian Polity, Federal System, p.140; Laxmikanth, M. Indian Polity, Union and Its Territory, p.49

7. Solving the Original PYQ (exam-level)

Now that you have mastered the Salient Features of the Constitution and the nuances of Article 1, this question serves as the perfect test of your ability to distinguish between constitutional concepts and literal constitutional text. While your studies have shown that India possesses a federal structure—complete with a written constitution and a division of powers—you must remember that the word 'Federal' was intentionally omitted by the drafting committee. As highlighted in Indian Polity by M. Laxmikanth, Article 1 defines India as a 'Union of States' to signify that the Indian federation is not the result of an agreement and that no state has the right to secede.

To arrive at the correct answer, (D) nowhere, you must navigate the common traps set by the UPSC. A student might be tempted by (A) the Preamble, assuming such a foundational concept must be there, or (C) Article 368, because that article deals with the 'federal' requirement of state ratification for certain amendments. However, as Introduction to the Constitution of India by D.D. Basu clarifies, while the Supreme Court has designated federalism as a 'basic feature' of the Constitution, the specific term is absent from Part III and all other sections. The phrasing is federal in form but unitary in spirit, but the vocabulary remains strictly focused on the 'Union'.