Yes, Chapter 1 - Some Basic Concepts of Chemistry is important for entrance exams. It lays the foundation for understanding the principles and concepts of chemistry.

Key concepts covered in this chapter include:

1. Matter and its properties
2. Laws of chemical combinations
3. Atomic and molecular masses
4. Mole concept
5. Stoichiometry
6. Limiting reagent
7. Percentage composition and empirical formula
8. Molecular formula

Understanding these concepts is essential for solving problems related to stoichiometry, balancing chemical equations, and calculating the amount of reactants and products in a chemical reaction.

Moreover, this chapter provides a strong understanding of the fundamental principles of chemistry, which is necessary for further studies in the field of chemistry.

In summary, Chapter 1 - Some Basic Concepts of Chemistry is an important chapter for entrance exams as it lays the foundation for understanding the principles and concepts of chemistry. It is essential for solving problems related to stoichiometry, balancing chemical equations, and calculating the amount of reactants and products in a chemical reaction.

Yes this chapter is alphabet of Chemistry