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Best Reference Books For Class 10 CBSE 2020-21

This post is not sponsored and these are just my personals opinions. Please don't feel offended. Class 10.. who isn't scared of class 10. It is in class 10th that you get to face different kinds of pressures such as giving board exams for the first time,peer pressure, pressure from relatives, pressure from those annoying aunties who keep asking you about your grades, .. well, you get the idea. Students are under a lot of pressure to perform well in academics. And with that being said, here are some of the best books, which in my opinion, will help you a lot in class 10. 1) ALL IN ONE When it comes to board exams, you need to study each and every topic thoroughly, and this book is one of the best which you can have to get an in-depth knowledge on each and every topic . They also come with questions from previous year board exam papers and give you some more questions to learn and thus, strengthen your preparation. Believe me, this book will help you a lot in studying each and e...

Important chemical compounds for Class 10

  Chemistry is a subject which never fails to annoy students, But we are here to provide short notes about some compounds which are very important from chemistry's point of view. So ,without any further ado... LETS GET STARTED  !!! SODIUM CHLORIDE:- white crystalline solid insoluble in alcohol pure NaCl is not hygroscopic.it is hygroscopic due to impurities. used in 'salting' out of soap and making freezing mixtures. SODIUM HYDROXIDE:- prepared by chlor-alkali process. It is generally formed near cathode. It is deliquescent in nature. It is a white crystalline solid. It is corrosive It is sparingly soluble in alcohol. However, KOH is fairly soluble in alcohol. On exposure to atmosphere, it absorbs CO2 and forms sodium carbonate carbon monoxide is neutral but it shows acidic nature with NaOH sodium hydroxide break down protein to a pasty mass it is also called soda lye. SODIUM CARBONATE:- most important chemical of commercial use. Na2CO3.H2O is also known as crystal carbonat...

EVOLUTION

origin of species is written by Charles Darwin in 1859 Herbert Spencer coined the term 'survival of the fittest.' Lamarck gave the theory of progressive use and disuse of organs and believed in the inheritance of acquired characters. an experiment to prove that organic compounds were the basis of life was performed by Stanley Miller. nucleoproteins gave probably the first sign of life. a single chromosome contains hundred to thousands of genes. genetics is the study of inheritance. Y chromosome does not have any allele linked to it Three botanists - Hugo DeVries, Carl Correns and Erich von Tschermak ,independently rediscovered Mendel's work in the same year, a generation after Mendel published his papers. Evolution can be described as generation and shaping of diversity by environmental selection extinct species must have existed at some time:- this statement describes evolution java man, peking man and heidelberg man are the fossils of "homo erectus". crow magnon...