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NCERT Solutions for Class 10th Social Science Chapter 4

NCERT Solutions Class 10 Maths Chapter 1 : After understanding some basic rules regarding real and irrational numbers in earlier grades, the first chapter of Class 10 Maths starts with some of the most critical concepts in Algebra.

The Division Lemma lemma chaptsr an algorithm, a proven statement used to prove other statements by Euclid is one of the first concepts that students will learn, followed by the Fundamental Theorem of Arithmetic by Carl Freidrich Gauss. NCERT Math Solution Class 10 Chapter 2 : Expanding from the basics of polynomials learned in earlier classes, the chapter explains the concept of degree of polynomials and how polynomial with degree 1 is a linear polynomial, degree 2 a quadratic polynomial, and degree 3 a cubic polynomial.

NCERT Maths Class 10 Solutions Chapter 3 : In this chapter, we will learn several methods such as the substitution method, elimination method, and cross-multiplication method.

The final concept in the chapter is the reduction of equations in ncert solutions class 10th chapter 4 rate variables. NCERT Maths Solution Class 10 Chapter 4 : In this chapter, we will learn the standard form of quadratic equations, different methods of solving quadratic equations by factorization, by completing the squareand the nature of roots. One of the most important ones is the Fibonacci sequence 0, 1, 1, 2, 3, 5, 8, 13, 21,�.

However, if we want to find a particular number in the sequence such as the 30th or 40th number, we have to use arithmetic progression. By using simple formulas of arithmetic progression it is possible to find numbers at specific places in a long series.

In this chapter, we will learn how similar triangles follow similarities in sizes and angles, and how we can 110th similarities to solve problems. We will learn through exercises about how to determine such similarities and ncert solutions class 10th chapter 4 rate learn how to ncert solutions class 10th chapter 4 rate find areas of triangles that are similar.

Class 10th Maths NCERT Solutions Chapter 7 : Furthering the ncert solutions class 10th chapter 4 rate of triangles, this chapter teaches how we can find the distance between two points through the distance formula for triangles.

Similarly, we will also learn how rqte find areas of triangles fhapter a sectional formula for triangles. Trigonometry is the measurement metry of triangles trigono. Through the use of trigonometry, we will try to solve practical problems by ncert solutions class 10th chapter 4 rate concepts such as the line sooutions sight, angle of depression, and angle of elevation to determine height or distance.

In this chapter, students will learn about tangents and the different scenarios when lines touch or bisect circles on a given plane. How a line ncert solutions class 10th chapter 4 rate with a circle opens up different possibilities and problems and students will learn how to solve. Maths NCERT Class 10 Chapter 11 Solutions : In this chapter on Construction, we will apply the rules of geometry learned so far, and construct shapes from dimensions and solutikns provided.

Using tools such as a ruler, pencil, and protractor, students will form shapes according to different problems in the exercises. Referring to Construction Class 10 PDF ncret is essential for this chapter to check if the structure created by students is as intended in the question.

By merging lines and other shapes within circles, students will learn how to measure the areas of different segments using theorems and the number Pi. Class 10 Math Solution Chapger 13 : After looking at shapes on a plane, we move on to a 3-dimensional world solutjons look at shapes ncert solutions class 10th chapter 4 rate squares or rectangles as cubes or cuboids, triangles as cones, and circles as cylinders or spheres.

We will learn in this rafe how to view objects as shapes ncert solutions class 10th chapter 4 rate solve practical problems such as finding surface area and volume as mentioned in the exercises. Class 10th Maths NCERT Solution Chapter 14 : Used holistically in business, economics, and many other areas, we will learn how to find mean averagemedian, and mode from a grouped dataset.

After learning that, we will also study how to portray data in a graphical manner to understand trends and correlations within data. Students will learn some theoretical aspects of probability and apply them to determine impossible events, certain and uncertain events. Conclusively, the concepts of probability in the chapter will allow students to learn how to determine the outcomes of events through formulas.

Download � Algebra Formulas for Class Experts and fellow clsss constantly keep up with the Embibe Ask portal to check questions and provide answers in a detailed and swift manner. Furthermore, you can also check the portal to find interesting questions posted by other students to improve your knowledge. Ask An Academic Question Now. After going through a chapter, it is important to practice questions and attempt mock exams to get better at Maths.

Embibe not only offers you books and solutions hcert practice ncsrt study but also other resources like practice questions and mock tests. Both practice questions and mock tests are available for free on Embibe so that you can solutiohs your knowledge and test scores. The Maths Class 10 solutions provided here will allow you to easily understand problems for all the chapters.

When you study Mathematics, it is important to keep practicing all chapters so that you do not forget the formulas and rules for solving problems.

We hope this article helps you. If you have any questions, feel free to ask in the comment clxss. We will get back to you at the earliest. Stay tuned to embibe. Support: support embibe.

General: ratte embibe. Class 10 Practice Questions. Unit 1 � Number System. Unit 2 � Algebra. Unit 3 � Coordinate Geometry. Unit 4 � Geometry. Unit 5 � Trigonometry. Unit 6 � Mensuration. Unit 7 � Statistics And Probability. Keeping the concepts in mind, they are easy to understand and handy to practice.

A: You can download the PDF files through the respective chapter links and keep them on your computer or mobile phone for later reference. Chspter can also print these files if you solutiond. Q5: How to chaptee for Class clxss Maths exams? A: If you have ample time, you should consider practicing every chapter at least. On Embibe, you can accurately track your progress and identify weak areas.

A: You can easily refer to this article on Maths formulas for Class It covers the entire syllabus and contains all the formulas that are important for the exam. Q7: How can I score chaptr marks in 10th Maths exam?

A: The most important thing is to practice sums and problems every day. Pay special attention to units cpass Algebra, Trigonometry, Statistics, and Probability as these topics have the highest weightage and can help you score maximum marks in the exam.

You should know:

For combined reportVessel skeleton for the 16' outboard garvey carcass ckass tack as well as glue plywood or aluminum, Hydraulic steering. You have right away remade a estuary though we're still endangered connected with a density inside of a building. A a single cause I would shift is to have operate of tiny screws instead of nails (simply personal choice).

Hard water contains the chloride and sulphates of calcium and magnesium. When soap will add in the hard water form less lather so some amount of salt is unused. This insoluble salt is known as scum. Solution Since Soap is basic in nature hence red litmus turns blue but blue litmus has no changes. Solution The addition of hydrogen on the unsaturated compounds are known as hydrogenation. Unsaturated compounds convert into the saturated compounds.

Through this process the vegetable oil is converts into ghee. Solution Unsaturated hydrocarbons undergo addition reactions. Solution Cooking oil is unsaturated fats but the butter is saturated. By hydrogenation, oil will reacts but butter will not reacts. Question Explain the mechanism of the cleaning action of soaps. Solution Cleansing action of soaps:- Soap contains the two parts.

One part is hydrophilic and other part is hydrophobic. Soaps are the sodium or potassium salt of long chain of carboxylic acid. Answer: Carbon and its compounds give a large amount of heat per unit weight and are therefore, used as fuels for most applications. Question 10 Explain the formation of scum when hard water is treated with soap.

Answer: Hard water contains salts of calcium and magnesium. Calcium and magnesium on reacting with soap form insoluble precipitate called scum. The scum formation lessens the cleansing property of soaps in hard water. Question 11 What change will you observe if you test soap with litmus paper red and blue?

Answer: Red litmus will turn blue because soap is alkaline in nature. Blue litmus remains blue in soap solution. Question 12 What is hydrogenation?

What is its industrial application? Answer: The addition of hydrogen to an unsaturated hydrocarbon to obtain a saturated hydro-carbon is called hydrogenation. The process of hydrogenation takes place in the presence of nickel Ni or palladium Pd metals as catalyst.

Application : The process of hydrogenation has an important industrial application. It is used to prepare vegetable ghee or vanaspati ghee from vegetable oils. So addition reaction take place only in C 3 H 6 and C 2 H 2.

Question 14 Give a test that can be used to differentiate chemically between butter and cooking oil. Answer: Butter is a saturated carbon compound while cooking oil is an unsaturated carbon compound. An unsaturated compound decolourises bromine water, while a saturated compound cannot decolourise it.

So we can distinguish chemically between a cooking oil and butter by the bromine water. Add bromine water to a little of cooking oil and butter taken in separate test-tubes. Question 15 Explain the mechanism of the cleaning action of soaps. OR Explain the cleansing action of soaps. In this way the soap micelle entraps the oily or greasy particles by using its hydrocarbon ends. The ionic ends of the soap molecules in the micelles, however, remain attached to water.

When the dirty cloth is agitated in soap solution, the oily and greasy particles present on its surface and entrapped by soap micelles get dispersed in water due to which the soap water becomes dirty but the cloth gets cleaned.

The cloth is cleaned thoroughly by rinsing in clean water a number of times. Carbon compounds: Covalent bonding in carbon compounds, Versatile nature of carbon, Homologous series, Nomenclature of carbon compounds containing functional groups, halogens, alcohol, ketones, aldehydes, alkanes, and alkynes , difference between saturated hydrocarbons and unsaturated hydrocarbons.

Chemical properties of carbon compounds combustion, oxidation, addition and substitution reaction. Ethanol only properties and uses , Ethanoic acid only properties and uses , soaps and detergents.

Formulae Handbook for Class 10 Maths and Science. Question 2 What would be the electron dot structure of a molecule of sulphur, which is made up of eight atoms of sulphur? Hint � The eight atoms of sulphur are joined together in the form of a ring. Question 3 How many structural isomers can you draw for pentane? Solution: We can draw 3 structural isomers for pentane.

Question 4 What are the two properties of carbon that lead to the huge number of carbon compounds we see around us? Solution: Due to its large valency, carbon atoms can form covalent bonds with a number of carbon atoms as well as with a large number of other atoms such as hydrogen, oxygen, nitrogen, sulphur, chlorine and many more atoms.

This leads to the formation of a large number of organic compounds. Question 5 What will be the formula and electron dot structure of Cyclopentane? Question 6 Draw the structures for the following compounds. Ethanoic acid ii. Bromopentane iii. Butanone iv. Hexanal Solution:. Question 7 How would you name the following compounds? Solution: i. Ethyl bromide ii. Formaldehyde iii. Question 8 Why is the conversion of ethanol to Ethanoic acid an oxidation reaction?

Solution: The conversion of ethanol into ethanoic acid is called an oxidation reaction because oxygen is added to it during this conversion. Question 9 A mixture of oxygen and ethyne is burnt for welding. Solution: When a mixture of oxygen and ethyne is burnt, it burns completely producing a blue flame. This blue flame is extremely hot which produced a very high temperature which is used for welding metals.

But the mixture of ethyne and air is not used for welding purposes because burning of ethyne in air produces a sooty flame, which is not enough to melt metals for welding.

Question 10 What are oxidizing agents? Solution: Oxidizing agents are the substances that gain electrons in an redox reaction and whose oxidation number is reduced. Question 11 Explain the nature of the covalent bond using the bond formation of CH 3 Cl.

Solution: CH 3 Cl methyl chloride is made up of one carbon atom, three hydrogen atoms and one chlorine atom. Carbon atom has 4 valence electrons, each hydrogen atom has one valence electron, and a chlorine atom has 7 valence electrons.

Carbon atom shares its four valence electrons with three hydrogen atoms and 1 chlorine atom to form methyl chloride as follows: From the above reaction, in the dot structure of methyl chloride CH 3 Cl there are four pairs of shared electrons between carbon and other atoms.

Each pair of shared electrons constitutes one single covalent bond. So, methyl chloride has four single covalent bonds. Question 12 Draw the electron dot structures for- Solution:. Question 13 What is a homologous series? Solution: Homologous series is a series of compounds with a similar general formula, possessing similar chemical properties due to the presence of the same functional group, and shows a gradation in physical properties as a result of increase in molecular size and mass.

For example, methane has a lower boiling point than ethane since it has more intermolecular forces with neighbouring molecules. This is because of the increase in the number of atoms making up the molecule. Question 14 How can ethanol and Ethanoic acid be differentiated on the basis of their physical and chemical properties? Solution: i Ethanol has a pleasant smell whereas ethanoic acid has the smell of vinegar. Question 15 Why does micelle formation take place when soap is added to water?

Will a micelle be formed in other solvents such as ethanol also? Solution: Micelle formation takes place when soap is added to water. This is because when soap is added to water in which dirty clothes are soaked, the two parts of the soap molecule dissolves in two different mediums. The organic tail dissolves in the dirt, grime or grease and the ionic head dissolves in water. When the clothes are rinsed or agitated, the dirt gets pulled out of the clothes in the water by the soap molecule.

In this way the soap does its cleaning work on dirty and grimy clothes or hands. The soap molecules actually form a closed structure because of mutual repulsion of the positively charged heads. This structure is called a micelle. Question 16 Why are carbon and its compounds used as fuels for most applications?

Solution: Carbon and its compounds are used as fuels for most of the applications because they burn in air releasing a lot of heat energy. Question 17 Explain the formation of scum when hard water is treated with soap. Solution: The precipitate form of scum is formed when soap is used for washing clothes. With hard water, a large amount of soap is wasted in reacting with the calcium and magnesium ions of hard water to form an insoluble precipitate.

The precipitate form formed by the action of hard water on soap, sticks to the clothes being washed and interferes with the cleaning ability of the additional soap. This makes the cleaning of clothes difficult. Question 18 What change will you observe if you test soap with litmus paper red and blue? Solution: Soap is the salt of a strong base NaOH and a weak acid carboxylic acid , so a solution of soap in water is basic in nature.

Being basic, a soap solution turns red litmus paper blue. Question 19 What is hydrogenation? Solution: It is a class of chemical reactions in which the net result is addition of hydrogen H 2 to unsaturated organic compounds such as alkenes, alkynes, etc.

Hydrogenation is widely applied to the processing of vegetable oils and fats. Complete hydrogenation converts unsaturated fatty acids to saturated ones. From the above hydrocarbons C 2 H 2 is an alkyne, whereas C 3 H 6 is an alkene. So, C 3 H 6 and C 2 H 2 will undergo addition reactions.

Question 21 Give a test that can be used to Ncert Solutions Class 10th Maths Chapter 7 Rate differentiate chemically between butter and cooking oil. Solution: Bromine water test can be used to differentiate chemically between butter and cooking oil. Add bromine water to a little of cooking oil and butter taken in separate test tubes. Download Class 10 Maths App for offline use. Students should go for Vedic Maths to improve calculations.

Download Exercise 4. Please provide your feedback about the contents. Many people believe that Babylonians were the first to solve quadratic equations. Greek mathematician Euclid developed a geometrical approach for finding out lengths which, in our present day terminology, are solutions of quadratic equations.

Solving of quadratic equations, in general form, is often credited to ancient Indian mathematicians. In fact, Brahmagupta A. An Indian Mathematician Sridharacharya A.

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