Foundation Course, Live Online – Offline Course

RIL Class 9 : Foundation Chemistry (2022-23)

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DC Sonali
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Chemistry

Chemistry is the study of matter and its properties. It is how and why substances combine or separate to form other substances and how the substances interact with energy. The Subject primarily focuses on ions, atoms, molecules which in turn forms elements and compounds. Chemical species interact with each other and often form chemical bonds. You will get to know the interactions between matter and energy in Chemistry.

In class IX, a student learns basic concepts of matter, categorization of matters in different solutions and mixtures, laws of chemical reaction, numerical based on mole concept and molecular mass, fundamental units of atoms, calculation of atomic numbers, valency and mass numbers.  Students must learn these concepts in-depth to develop their skills in the subject and build a strong foundation.

Course Features

  • Off-Line Classroom Lectures as per time table.
  • Live-Online Classroom Lectures as per time table.
  • Doubt Resolving Sessions.
  • Academic & Technical Support.
  • Complete access to all classroom lectures.
  • Printed and Digital Classroom Study Material.
  • Exercise Sheets.
  • Recorded Video Lectures.
  • Online Test Series.
  • Student Performance Report.
  • Final Revision Classes.
  • Personalized guidance and mentoring.
  • Computer Based Test and Detailed Analysis.
  • One to One Academic Counseling sessions.
  • One to One PTM.
  • Comprehensive monthly progress Report.
  • Personalized extra classes.
  • Toppers Talk Shows.
  • Motivational Sessions.
  • Counseling Academic / Career / Psychological Sessions.
  • Small batch size.

Why Dedicated Classes?

We cover all the topics of NCERT including questions and numerical of each individual topic for better understanding of the student. Each and every topic is explained in detail and solved examples are given after each topic. Our course covers a detailed and vivid explanation with real life examples so that students can relate the particular example with day to day life, which helps them to acknowledge the topic strongly. After every chapter, Objective type questions, Very short answer type questions, short answer type questions, long answer type questions and HOTS are being discussed with students.

Our Features

  • Experienced and Best Faculty Team.
  • Regular Monitoring.
  • Result Oriented Teaching Methodology.
  • Relevant Study Material.
  • Result Test Series and Performance Analyses.
  • Well Structured Academic Control.
  • Ongoing Research and Development.
  • Intellectual and Concern Management.
  • Regular Digital /Hi – Tech Communication.
  • Soft Skill Development.
  • Problem analyses and support.
  • Full Academic Support.
  • Personalized attention.
  • Open Heartily Welcome new ideas and advise.

Chapter 1 Matter In Our Surroundings
Chapter 2 : IS MATTER AROUND US PURE?
Chapter 3 : ATOMS AND MOLECULES
Chapter 4 : STRUCTURE OF THE ATOM
Revision
What is chemistry?
Chemistry is a branch of Science that is related to the study of composition, structure, properties, reactions, synthesis, and uses of different materials in the day to day life.
What is the importance of studying chemistry?
Chemistry is an incredibly fascinating field of study. Because it is so fundamental to our world, chemistry plays a role in everyone's lives and touches almost every aspect of our existence in some way. Chemistry is essential for meeting our basic needs of food, clothing, shelter, health, energy, and clean air, water, and soil. Chemical technologies enrich our quality of life in numerous ways by providing new solutions to problems in health, materials, and energy usage. Thus, studying chemistry is useful in preparing us for the real world.
How is chemistry related to other branches of Science?
Chemistry is often referred to as the central science because it joins together physics and mathematics, biology and medicine, and the earth and environmental sciences. Knowledge of the nature of chemicals and chemical processes therefore provides insights into a variety of physical and biological phenomena. Knowing something about chemistry is worthwhile because it provides an excellent basis for understanding the physical universe we live in. For better or for worse, everything is chemical!
I find this subject difficult. Can you give me some tips to make the subject easier to learn?
You should pay attention to following things:
1. Review and Study Material Before Going to Class
2. Seek Understanding
3. Take Good Notes
4. Practice Daily
5. Take Advantage of Lab Time
6. Use Flashcards
7. Use Study Groups
A naturally occurring sample of lithium contains 7.42% of 6Li and 92.58% of 7Li. Calculate the atomic mass of a naturally occurring sample of lithium.
Percentage composition of 6Li = 7.42% Relative atomic mass of 6Li = 6.015 Percentage composition of the 7Li = 98.58% Relative atomic mass = 7.016 Atomic mass = (percentage isotopic composition × relative mass of 6Li) + (percentage isotopic composition × relative mass of 7Li) Atomic mass = (0.0742 × 6.015) + (0.9258 × 7.016) = 0.446 + 6.49 = 6.936u
Define atomicity? What are diatomic molecules? Give two examples.
Atomicity can be defined as the total number of atoms that composes a molecule. Simply put, it is the no of atoms present in a molecule. For example, each molecule of oxygen is composed of two oxygen atoms. So atomicity of oxygen is 2. In older contexts, atomicity is sometimes synonymous with valency.

Examples:

Inert gases like helium, neon etc are monoatomic
Hydrogen, Oxygen is diatomic
Ozone is triatomic
Phosphorus(P4) is tetratomic
Why is Crystallization considered better than simple evaporation
Crystallisation is a process that separates a pure solid in the form of its crystals from a solution. Crystallisation is better than evaporation because during Evaporation. Some solids decompose or some, like sugar, may get charred on heating to dryness. Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid. Impure solids are obtained by evaporation and are further purified by crystallisation. e.g. salt obtained from the sea is further purified by this method. In some cases e.g. sugar crystal cannot be obtained by simple evaporation technique because sugar gets charred on heating to dryness. In such cases, the crystallisation technique is applied.
What is latent heat of vaporization?
Latent heat is defined as the heat or energy that is absorbed or released during a phase change of a substance. It could either be from a gas to a liquid or liquid to solid and vice versa. Latent heat is related to a heat property called enthalpy.
How is Hybrid course different from other programs?
Dedicated Classes’ Hybrid coaching programs are a blend of online and classroom learning. Other coaching programs provide either online or offline learning modules. Our Hybrid courses offer flexibility and convenience to students as they learn online and continue to have regular interaction with faculty.
How can I succeed in a hybrid course?
You should be comfortable using computers and the Internet.
You need excellent time management skills and self-motivation.
You need to be competent at typing.
You need to read assignments and instructions very carefully.
You need to keep up with class reading and assignments.


Admissions Open For Academic Session 2022-23

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