There are several difficult or challenging topics in the Humanities Class 11 curriculum. These topics require a deeper understanding and critical thinking skills. Here are some chapter notes specifically for these challenging topics:

1. Indian Constitution:
- Understanding the Preamble: The Preamble of the Indian Constitution is a challenging topic as it requires an understanding of the objectives and principles of the Constitution.
- Fundamental Rights and Duties: This topic involves a detailed analysis of the fundamental rights and duties enshrined in the Constitution. It is important to understand the scope and limitations of these rights and duties.
- Constitutional Amendments: The process of amending the Constitution and the significance of various amendments is a complex topic. It requires a thorough understanding of the historical context and the impact of amendments on society.

2. Political Science:
- Electoral Politics: This topic involves an in-depth analysis of the electoral system, political parties, and the role of media in elections. Understanding the dynamics of electoral politics can be challenging.
- Democracy and Diversity: Exploring the relationship between democracy and diversity can be complex, as it involves understanding the challenges of managing diversity in a democratic society.
- Federalism: Understanding the concept of federalism and the distribution of power between the central and state governments can be challenging. It requires an understanding of the constitutional provisions and the working of federal systems.

3. Economics:
- National Income Accounting: This topic involves measuring national income, calculating GDP, and understanding the various methods used in national income accounting. It requires a strong understanding of concepts and calculations.
- Money and Banking: Understanding the functioning of the banking system, types of money, and the role of the central bank can be challenging. It involves grasping complex financial concepts and their practical applications.
- Globalization and the Indian Economy: This topic requires an understanding of the impact of globalization on the Indian economy, including trade, investment, and employment. It involves analyzing the opportunities and challenges posed by globalization.

In conclusion, the Humanities Class 11 curriculum covers several challenging topics in subjects like Indian Constitution, Political Science, and Economics. Understanding these topics requires a deeper understanding, critical thinking, and analysis of complex concepts and their practical applications.