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Textbooks PDF (I-XII) RTI I ... chemistry I : Rationalised Content: Prelims: Guide for using QR Code: Chapter 1: Chapter 2: Chapter 3: Chapter 4: Chapter 5: Chapter 6: Chapter 7: Chapter 8 ... FOLLOW NCERT. Total Visitors: Contact Us. NCERT, Sri Aurobindo Marg, New Delhi-110016. dceta.ncert@nic.in +91 8800440559. Important Helpline Numbers. Women Helpline Number : 7827170170. Cybercrime Reporting Number : 1930.
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The information part has been significantly reduced and, wherever possible, it has been substantiated with facts. However, it is necessary for students to be aware of commercially important chemicals, their processes of manufacture and sources of raw materials. This leads to descriptive material in the book.
The pursuit of knowledge of what goes on chemically within a living system falls in the domain of biochemistry. Living systems are made up of various complex biomolecules like carbohydrates, proteins, nucleic acids, lipids, etc. Proteins and carbohydrates are essential constituents of our food.
Unit 1 Some Basic Concepts of Chemistry 1 1.1 Importance of Chemistry 4 1.2 Nature of Matter 4 1.3 Properties of Matter and their Measurement 6 1.4 Uncertainty in Measurement 10 1.5 Laws of Chemical Combinations 14 1.6 Dalton’s Atomic Theory 16 1.7 Atomic and Molecular Masses 16 1.8 Mole Concept and Molar Masses 18
The coordination number (CN) of a metal ion in a complex can be defined as the number of ligand donor atoms to which the metal is directly bonded. For example, in the complex ions, [PtCl6]2– and [Ni(NH3)4]2+, the coordination number of Pt and Ni are 6 and 4 respectively.
CHEMISTRY CLASS XII Time: 3 Hrs. Max. Marks 70 General Instructions 1. All questions are compulsory. 2. Marks for each question are indicated against it. 3. Q1 to 8 are multiple choice questions. 4. Q1 to 5 carry one mark each. 5. Q6 to 8 carry two marks each and may have more than one correct answer. 6. Q9 to 15 carry two marks each. 7.
Objectives. After studying this Unit, you will be able to. describe interfacial phenomenon and its significance; define adsorption and classify it into physical and chemical adsorption; explain mechanism of adsorption; explain the factors controlling adsorption from gases and solutions on solids;
