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  1. Textbooks PDF (I-XII) ... Chemistry Part II: Rationalised Content: Prelims: Guide for using QR Code: Chapter 1: Chapter 2: Chapter 3: Chapter 4: Chapter 5 Chapter 6: Chapter 7 ... 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.

  2. Textbooks PDF (I-XII) Welcome to the Online Textbooks Section. This online service offers easy access to the NCERT textbooks. The service covers textbooks of all subjects published by NCERT for classes I to XII in Hindi, English and Urdu.

  3. NCERT, Sri Aurobindo Marg, New Delhi-110016. dceta.ncert@nic.in. +91 8800440559

  4. 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.

  5. The d-block of the periodic table contains the elements of the groups 3-12 in which the d orbitals are progressively filled in each of the four long periods. The f-block consists of elements in which 4 f and 5 f orbitals are progressively filled. They are placed in a separate panel at the bottom of the periodic table.

  6. ncert.nic.in › textbook › pdfUnit - 9 - NCERT

    The chemistry of coordination compounds is an important and challenging area of modern inorganic chemistry. New concepts of chemical bonding and molecular structure have provided insights into the functioning of these compounds as vital components of biological systems. Chlorophyll, haemoglobin and vitamin B12 are coordination compounds of ...

  7. The replacement of hydrogen atom(s) in an aliphatic or aromatic hydrocarbon by halogen atom(s) results in the formation of alkyl halide (haloalkane) and aryl halide (haloarene), respectively. Haloalkanes contain halogen atom(s) attached to the sp3 hybridised carbon atom of an alkyl group whereas haloarenes contain halogen atom(s) attached to ...

  8. principles of chemistry. A particular element may occur in a variety of compounds. The process of metallurgy and isolation should be such that it is chemically feasible and commercially viable. Still, some general principles are common to all the extraction processes of metals. For obtaining a particular metal, first we look for

  9. chemistry of elements of groups 15,16,17 and 18; • learn the preparation, properties and uses of dinitrogen and phosphorus and some of their important compounds; • describe the preparation, properties and uses of dioxygen and ozone and chemistry of some simple oxides; • know allotropic forms of sulphur, chemistry of its important

  10. Electrochemical cells are of two types. In galvanic cell, the chemical energy of a spontaneous redox reaction is converted into electrical work, whereas in an electrolytic cell, electrical energy is used to carry out a non-spontaneous redox reaction.

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