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10th Class Chemistry Chapter 11  Organic Chemistry Notes

10th Class Chemistry Chapter 11  Organic Chemistry Notes   Question 1: Write a note on history of organic and inorganic chemistry? Answer: History of Organic and Inorganic chemistry: Initially (before 1828), the name organic chemistry was given for the chemistry of compounds obtained from plants and animals, i.e., from living organism. The word organic signifies life. …

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10th Class Chemistry Chapter 10  Acids bases and salts

10th Class Chemistry Chapter 10  Acids bases and salts Question 1: In how many groups all present day organic and inorganic substances are classified? Also write a note on history of acids? Answer: History of Acids and Bases: Acids, bases and salts are three distinct classes in which almost all the organic and inorganic compounds …

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10th Class Chemistry Chapter 9 Chemical Equilibrium

10th Class Chemistry Chapter 9 Chemical Equilibrium Q1. Describe a reversible reaction with the help of an example and graph. Answer: Reversible reaction:  A reaction in which the products recombine to form reactants is called reversible reaction. OR  a reaction that proceed both in forward as well as reverse direction is called reversible reaction. Representation: A reversible …

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Chapter 8 Chemical Reactivity 9th Class Chemistry Notes

Chapter 8 Chemical Reactivity 9th Class Chemistry Question#1) Define metals? What are the different groups of metals? Answer: METALS Metals are the elements (except hydrogen) which are electropositive and form cations by losing electrons.   Classification of Metals: Metals can be categorized. Very reactive:potassium, sodium, calcium, magnesium and aluminium. Moderately reactive :zinc, iron, tin and …

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Chapter 7 Electrochemistry 9th Class Chemistry Notes

Chapter 7 Electrochemistry 9th Class Chemistry Notes   Question#1: Define electrochemistry? Also write a detailed note on oxidation reduction reactions? ELECTROCHEMISTRY: Electrochemistry is the branch of Chemistry that deals with the relationship between electricity and chemical reactions. OXIDATION AND REDUCTION REACTIONS ON THE BASIS OF ADDITION OR REMOVAL OF OXYGEN: Oxidation: Oxidation is defined as addition of …

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Chapter 5 PHYSICAL STATES OF MATTER 9th Class Chemistry

PHYSICAL STATES OF MATTER 9th Class Question#1) What is Matter? Write a note on different physical states of matter? Answer: Matter: Any thing that has mass and occupy space is called matter. Matter exists in three physical states. 1) Gas.  2) Liquid.  3) Solid. 1) Gas or Gaseous state: State of matter that has neither fixed …

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STRUCTURE OF MOLECULE 9th Class Chemistry Chapter 4

Chapter#4   STRUCTURE OF MOLECULE 9th Class   Question#1) Define atom? Why do atoms forms chemical bond (Formation of Molecule)? Atom: Smallest entity of an element that show all the properties of that element and can enter into a chemical reaction is called atom. WHY DO ATOMS FORM CHEMICAL BONDS? 0R WHY DO ATOMS REACT? Answer: Atoms …

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Chapter 3 Periodic Table 9th Class Chemistry Notes

Chapter 3 Periodic Table 9th Class Chemistry Notes Question#1: Define Periodic table? What is the importance of periodic table? Answer: Periodic Table:- Periodic table is the arrangement of elements in order of increasing atomic number in such a way that those with similar properties are placed one above other in the form of a table. OR Periodic table …

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Chapter 2 STRUCTURE OF THE ATOM 9th Class Chemistry Notes

Chapter 2 STRUCTURE OF THE ATOM 9th Class Chemistry Notes   Q#1) What is atom? Write in short words about history of atoms? Answer: In 585 B.C, Ancient Greek philosopher Democritus suggested that matter is composed of tiny indivisible particles called atoms.The name ATOM was derived from the Latin word Atomos meaning indivisible. Daltons Atomic Theory : In 1808 …

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Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes

Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes Question#1) Write a short note on history of chemistry? Answer:History of Chemistry: Chemistry derived its name from word alchemy, which is a European word derived from the Arabic word al-kimia. Alkemai is the old name of Egypt. The word alcheme, khame, kheme means black earth. …

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Chapter 18 Pharmacology 10th Class Biology Notes

Chapter 18 Pharmacology 10th Class Biology Notes Pharmacology 10th Class Biology Notes Question 1: Define Pharmacology, Pharmacy and Pharmacognosy? Answer: Pharmacology: Pharmacology is the combination of two Greek words. Pharmakon means drug and logy means to study or to discuss. Pharmacology is the study of drug composition, properties and medical applications.  OR  Pharmacology is the study …

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Chapter 17 Biotechnology 10th Class Biology Notes

Biotechnology 10th Class Question 1: Define biotechnology and describe its importance. Also write a detailed note on modern biotechnology or genetic engineering? Describe the achievements of genetic engineering in medicine, agriculture and environment. Or what is biotechnology. Write a detailed note on scope and importance of biotechnology?   Answer: Definition of Biotechnology: Biotechnology is defined …

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Chapter Number 16 Man and His Environment – 10th Class Biology Notes

Chapter Number 16 Man and His Environment – 10th Class Biology Notes Question 1: Define the following terms? (1) Environment (2) Habitat (3) Ecology (4) Niche (5) Conservation. (6) Biomass. Answer: (1) Environment: The surrounding of an organism is called environment. Environment includes all the biotic and abiotic factors that influence an organism. (2) Habitat: The …

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Chapter Number 15 Inheritance – 10th Class Biology Notes

Chapter Number 15 Inheritance – 10th Class Biology Notes Q#1) Define the following. Inheritance.  2) Heridity 3)Variation 4) Genetics 5) Genes 6) Chromosome 7) Chromation 8) Genotype 9) Evolution 10) Allele.   Answer: 1) Inheritance: Characters that are transmitting from parents to offsprings are called inheritance. These characters are of two types’ (a) Heridity (b) Variation. …

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Discovery of Antimalarial Drug

Discovery of Antimalarial (Anti-periodic) drug   “OR”  Treatment of Malaria    Quinine (the antimalarial drug) was accidentally discovered in 17th century. According to one of the legend an Indian was lost in the jungle of the Andes ( Andes are the world’s longest exposed mountain range. They lie as the continuous chain of highlands along the …

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