Shivangi Srivastava
NDA & CDS 1 2026 Exam Chemistry–Redox Reactions Class 8
Redox reactions (Reduction–Oxidation reactions) are among the most important concepts in chemistry. They involve the transfer of electrons between substances…
NDA & CDS 1 2026 Exam Chemistry–Carbon Class 7
Introduction Carbon is one of the most important elements on Earth. It is present in all living organisms and forms…
NDA & CDS 1 2026 Exam Chemistry–Preparation And Properties Class 6
Chemistry is the branch of science that studies materials, how they are made (preparation), and how they behave (properties). In…
NDA & CDS 1 2026 Exam Chemistry–Isolation Techniques Class 5
Isolation techniques are fundamental laboratory methods used to separate, purify, and identify chemical substances from mixtures. For students preparing for…
NDA & CDS 1 2026 Exam Chemistry–Physical And Chemical Changes Class 4
Everything around us changes in some way—ice melts, paper is torn, food is cooked, and iron rusts.In this chapter, students…
NDA & CDS 1 2026 Exam Chemistry– Atomic Structure Class 3
In this class, we continue our exploration of Atomic Structure, one of the most fundamental chapters in Chemistry for the…