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 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 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 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 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 6 Solutions | 9th Class Chemistry Notes Question#1) Write a note on solution and its components? Answer: SOLUTION: A solution is a homogeneous mixture of two or more substances. Example, the air we breathe is a solution of several gases, brass is a solid solution of Zn and Cu. Sugar dissolved in water is an …
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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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 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 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 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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NTS CT Teacher Past Paper Year 2016 Solved General Science Which of the following is different from others? a) Butterfly b) Spider c) Grass hopper d) Bug e) Fish (Note: Answers of all the questions are at the end of the article. For More Teachers Past Papers Click Here Teachers Past Papers) When we …
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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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 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 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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Reproduction Biology Notes Question 1: What is Reproduction? What are different types of reproduction? Answer: REPRODUCTION: Reproduction is defined as the production of individuals of the same species i.e. the next generation of species is called reproduction. Types of reproduction: Reproduction is of two types.
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 …
