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Bachelor Notes
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By
Pravin Keshari
Bachelor Notes
In this section you can find the notes of bachelor level, topic wise.
Basics of Chemistry Part-03 (Shell and Sub-shell Electronic configuration ) In the previous two parts of this series, we have learnt about details of first 20 elements, calculated their atomic weight and drawn their atomic structures. Not seen Part-1 and Part-2 yet?? Click here for Basics of Chemistry || Part-01 || Click here for Basics of Chemistry || Part-02 || In this part we will be discussing about shell(orbit) and sub-shell(orbital) electronic configuration of first 20 elements. We will learn how to write these electronic configurations and what information can be obtained from them. So, let us start... As we have seen in the atomic structure, the first shell (orbit) can accommodate maximum 2 electrons, we will first try to put 2 electrons in 1st orbit i.e., K-Shell (orbit). But, Hydrogen contains only 1 electron as a whole, so it contains only 1 electron in the 1st shell (Orbit). Then, the 2nd orbit i.e., L-Shell can accommodate maximum 8 electrons. So, we will ...
Classification of Elements Part-1 Very short questions and answers for S.E.E. students Questions and answers to practice for S.E.E. examination 1) On what basis did Mendeleev form the periodic table? Answer: Mendeleev in 1869 A.D. formed the periodic table with the increasing order of the atomic weights of elements. 2) On what basis did Moseley form the periodic table? Answer: Henery Mosele (1913 A.D.) formed the periodic table by arranging the elements in the increasing order of their atomic numbers. 3) Write the position of lanthanides in the periodic table. Answer: Lanthanides are placed on f-block at the bottom of the modern periodic table. 4) What are noble gases? Answer: Noble gases are inert and non-reactive gases like He, Ne, Ar, Kr, Xe andRn. 5) Where are inert gases placed in the modern periodic table? What is the specialty of their outermost shells? Answer: Inert gases are placed in the extreme right side of the modern periodic table in the zero group. T...
प्राविधिक प्रहरी नायव निरीक्षक - प्रथम पत्र (नेपाल प्रहरी) नेपाल पुलिस अन्तर्गत प्राविधिक प्रहरी को विधि विज्ञान (प्राविधिक प्रहरी नायव निरीक्षक) का लागी प्रथम पत्रमा सोधिएका प्रश्नहरु यस प्रकार छन्। यो प्रश्नहौ लोकसेवा आयोग द्वारा सोधिएको संयुक्त परिक्षा अनतर्गत विधि विज्ञानका लागि सोधिएको हो। मिति २०७८ - ०९ -२९ गते को दिन प्रथम पत्र र ३० गते द्वितीय पत्र (प्रहरी सेवा सम्बन्धि) परिक्षा संचालन भएको हो। Location of Central Police Forensic Science Laboratory: Click here समय ३ घण्टा पत्र : प्रथम पुर्णाङ्क : १०० Subject: Forensic Scien...
Asexual & Sexual Reproduction Artificial Vegetative Propagation Part-2 Very short questions and answers for S.E.E. students Questions and answers to practice for S.E.E. examination 1) What is multiple fission? Answer: Multiple fission is the method if asexual reproduction in which a parent organism splits into more than two daughter organisms at the same time. 2) What is vegetative propagation? Answer: Vegetative propagation is the method of asexual reproduction in which new plants are produced by cutting, sowing or grafting of the vegetative parts of plants like root, stem or leaves. 3) Name the plant that reproduce through root. Answer: Dahlia is a plant that reproduce through root. 4) Write the name of each of the plant propagated through root, and leaf. Answer: Root → Sweet Potato Leaf → Bryophyllum 5) What is sexual reproduction? Answer: The complex process in which reprod...
CHEMICAL REACTION Part-1 Very short questions and answers for S.E.E. students Questions and answers to practice for S.E.E. examination 1) What is word equation? Answer: The chemical reaction expressed by writing full names of reactants and product is called a word equation. 2) What are products? Answer: The elements or compounds that are produced during a chemical reaction are called products. Products are written on the right hand side of the arrow. 3) Write any two factors that affect the chemical reaction. Answer: Any two factors that affect the chemical reaction are: (i) Temperature and (ii) Pressure 4) What is meant by precipitate? Answer: A precipitate is an insoluble solid that emerges from a liquid solution during a chemical change. 5) What is acid-base reaction? Give one example. Answer: The chemical reaction in which an acid reacts with a base to form salt and water is called acid-base reaction. For example:...
Set of 50 MCQ's for CTEVT & Bridge Course Part-02 In this section you will find 50+ questions for practice. These questions are helpful for CTEVT as well as Bridge course entrance preparation of Science stream. Everyday a blog post will be posted with 50+ questions upto 10 days. These questions are available free of cost to all students. The 50 questions are classified as: 1) English - 10 questions 2) Chemistry - 10 questions 3) Physics - 10 questions 4) Biology - 10 questions 5) Maths - 10 questions Solve the MCQ's by yourself and check your aptitude. If you get stuck at any question, comment the question number(with your full name and phone number) below in the comment section. We will try to reply each and every comments. 50 MCQ for CTEVT & Bridge Course English 1) He is...........European singer. a. a b. an c. ...
Basics of Chemistry Part-01 ( First 20 elements) Before understanding Chemistry, you must understand and learn about first 20 elements of the modern periodic table. Learning first 20 elements gives you basic idea about chemistry and then you will be able to do more. Click here for High Quality Picture of Modern Periodic Table Let us start with first 20 elements. List of first 20 elements Atomic number Elements Symbol No. of electrons No. of protons No. of neutrons 1 Hydrogen H 1 1 0 2 Helium He 2 2 2 3 Lithium Li 3 3 4 4 Beryllium Be 4 4 5 5 Boron B 5 ...
Basics of Chemistry Part-04 (Valancy, charge & ions ) In the previous three parts of this series, we have learnt about details of first 20 elements, calculated their atomic weight, drawn their atomic structures and learnt about shell & sub-shell electronic configurations. Not seen Part-1, Part-2 & Part-3 yet?? Click here for Basics of Chemistry || Part-01 || Click here for Basics of Chemistry || Part-02 || Click here for Basics of Chemistry || Part-03 || In this part we will be discussing about valencies and radicals of the first 20 elements about which we have studied in previous parts. We will first learn to calculate valencies from shell and sub-shell electronic configurations and then we will be looking towards ions. So, let us start without any delay... After understanding shell electronic configuration, it is easy to predict valencies of the elements just by looking their last number. For example, the Electronic configuration (E.C.) of Lithium i...
Human Nervous and Glandular System Part-1 Very short questions and answers for S.E.E. students Questions and answers to practice for S.E.E. examination 1) What are nerves? Answer: Nerves are the communication lines for transmission of impulses from one part of body to another. Nerves are elongated, slender, thread like structures arising from the brain and spinal cord. 2) What is a neuron (or a nerve cell)? Answer: Neuron (nerve cell) is a highly specialized cell which acts as the structural and functional unit of nervous system. 3) Name the three membranes that surround the brain and spinal cord. Answer: The three membranes that surround the brain and spinal cord are duramater, piamater and archanoid mater. 4) What is cerebrospinal fluid? Answer: Cerebrospinal fluid is the fluid present between the layers of meninges. 5) Where is cerebrospinal fluid found? Answer: Cerebrospinal fluid is found between piamater and archanoid matter. 6) Write down the surface area of the cereb...
FORCE Part-2 Very short questions and answers for S.E.E. students Questions and answers to practice for S.E.E. examination 1) In which direction does the force of gravity act? Answer: The force of gravity acts towards the center of a planet/the earth. 2) What is 'acceleration due to gravity'? Write down its symbol and the S.I. unit. Answer: The acceleration produced in a freely falling object due to the influence of gravity is called acceleration due to gravity. The symbol of acceleration due to gravity is 'g' and its SI unit is meter per second square (m/s²). 3) What is the value of 'g' on equatorial region and polar region of the earth? Answer: The value of 'g' at equatorial region is 9.78 m/s² and that on polar region of the earth is 9.83 m/s². 4) What effect will be on acceleration due to gravity if radius of the earth is decreased? Answer: The magnitude of acceleration due to gravity increases if the radius of earth is decreased by keeping its ...
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