These notes are designed to provide a fundamental understanding of chemistry basics relevant to the General Awareness & Current Affairs section of the HTET exam.
Chemistry Basics
1. Simple Explanation
Chemistry is the branch of science that deals with the composition, structure, properties, and reactions of matter. In simpler terms, it's the study of what everything is made of, how these things behave, and how they change when they interact with each other. From the air we breathe to the food we eat, and the medicines we take, chemistry is fundamental to understanding the world around us.
2. Key Points
A. Matter and Its States
- Matter: Anything that has mass and occupies space (has volume).
- States of Matter:
- Solid: Has a definite shape and a definite volume. Particles are tightly packed and vibrate in fixed positions (e.g., ice, wood).
- Liquid: Has a definite volume but no definite shape; it takes the shape of its container. Particles are close but can move past each other (e.g., water, oil).
- Gas: Has neither a definite shape nor a definite volume; it expands to fill its container. Particles are far apart