Chapter 1 Solutions

🧪 Class 12 Chemistry – Chapter 1: Solutions (NCERT Based)

Welcome to Chapter 1 – Solutions, the foundation of physical chemistry for Class 12. This chapter helps students understand how substances mix at the molecular level and why solutions are essential in chemistry, biology, medicine, and daily life. From the saltwater in oceans to the glucose drip in hospitals — solutions are everywhere!

In this chapter, you will learn:

What are solutions, solutes, and solvents?
Types of solutions: gas in gas, solid in liquid, etc.
Concept of concentration: molarity, molality, mole fraction
Solubility and factors affecting it
Henry’s Law and Raoult’s Law
Colligative properties: boiling point elevation, freezing point depression, and more
Ideal vs non-ideal solutions
Van’t Hoff factor and abnormal molar mass

This page includes: ✅ Easy-to-understand video lectures
✅ Notes, MCQs, and concept tests
✅ Hindi-medium friendly content
✅ Complete coverage of CBSE and RBSE syllabus

Prepare smarter with Mayank Jain Sir and the Arambh Lecture Series — exclusively on DAsKLiBrO.

🎓 Lecture 1: Introduction to Solutions (Arambh Lecture 1.1)

In Lecture 1 of the Arambh Series, we begin with a strong foundation of Chapter 1 – Solutions. This session introduces students to the concept of solutions in chemistry, their importance in real life, and the basic terms like solute, solvent, and types of solutions.

Through relatable examples — like salt in water, air we breathe, and soft drinks — the lecture helps students understand:

What is a solution?
Why solutions are homogeneous mixtures
Real-life importance of studying solutions
Classification of solutions based on states of solute and solvent

This lecture sets the tone for the entire chapter and builds conceptual clarity in a simple and engaging way.

A rodemap to the chapter and world of Solutions

🎓 Lecture 2: Types of Solutions (Arambh Lecture 1.2)

00:00 Introduction

01:15 Whats Happens ??

03:59 Definition of Solution

05:58 solvent and solute

09:09 Is your chemistry Teacher Solute or solvent??

11:09 Type of Solution 🎯

12:47 Solution can form in all possible Combinations

14:22 What is the binary solution ❓

15:45 Three main categories Based on states

16:08 Gase solution

18:24 Liquid solution

19:59 Solid Solution

21:50 Is Air a Binary solution ❔❔

Brain Teaser - LA1

Solve all problems through this google form test

Lecture 5: Solubility (Arambha Lecture 1.5)

00:00 – Introduction to Solubility
04:53 – Definition of Solubility
08:28 – Types of Solubility Explained
10:13 – Solubility of Solids in Liquids
15:00 – "Like Dissolves Like" Concept
16:59 – Polarity of Molecules
20:12 – Dissolution Process Explained
24:24 – Crystallization in Solutions
27:34 – Dynamic Equilibrium in Solutions
31:10 – Saturated vs Unsaturated Solutions
33:30 – Temperature Effects on Solubility
36:31 – Le Chatelier’s Principle
41:28 – Pressure Effects on Gas Solubility

Lecture 6: Henry's Law (Arambha Lecture 1.6)

00:00 Solubility of a gas in liquid
06:54 Effect of pressure on Solubility of gases in liquids 🎯
11:09 Explanation of fig 2.1 - Effect of pressure on gas Solubility ❓
11:16 (A) Before increasing pressure
12:34 (B) After increasing pressure
14:45 📢 Henry's Law
16:25 How is Dalton Related to Henry's Law
25:15 Graphical representation of Henry's Law
26:33 Henry's Law Constant (k)
31:28 Application of Henry's Law
36:52 Effect of Temperature on Gas Solubility
37:24 Why this happen when temperature change??