Hi Aarushi

According to the syllabus of nios 10th its categorized into 2 groups -Group A and Group B.Group A includes the language subjects and other group includes the core subjects.

Group A-

Hindi, English, Urdu, Sanskrit, Bengali, Marathi, Telugu, Gujarati, Kannada, Punjabi, Arabic, Odia, Persian, Tamil, Nepali, Malayalam, Assamese

Group B-

Mathematics, Science and Technology, Social Science, Economics, Business Studies, Home Science, Psychology, Indian Culture and Heritage, Accountancy, painting, Ved Adhyayan, Sanskrit Vyakaran, Sanskrit Sahitya, Bhartiya Darshan

Now the topics for each subjects is as follows-

English-

Book 1- Snakebite, how the squirrel got its stripes, Kondiba.
Book 2- My vision for India, caring for others, the little girl, a prayer for healing, the truth, the return of the lion.

Social Science-

Introduction to social science, ancient world, medieval world, modern world, the impact of British rule in India, religious and social awakening in colonial India, popular resistance to the British rule, Indian national movement, constitutional values and political system in India, fundamental rights and fundamental duties

Mathematics -

Book 1-Algebra, commercial mathematics.
Book 2- geometry, mensuration, trigonometry, statistics

Psychology -

Book 1-Foundations of psychology, Basic Psychological Processes, Human Development.
Book 2-Social Psychological Processes, Health and Well Being, Work-Life and Environmental Concerns, Yoga: A Way of Life

Business Studies-

Nature and scope of the business, Industry, and Commerce, Cooperative societies and joint-stock companies, Transport services, warehousing, communication services, postal and courier services, banking services, outsourcing

Science and Technology -

Measurement in science, matter in our surroundings, moving things, energy, the living world, natural resources, humans, and the environment.

Economics-

Understanding economics, about the economy, producing goods and services, distribution of goods and services, money, banking and insurance, presentation and analysis of data in economics, Indian economy, Contemporary Economic Issues

For more information about nios you can check the following link

https://www.google.com/amp/s/school.careers360.com/articles/nios-syllabus/amp