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30.06.2021, adminOur Class 10 Science textbook solutions give students an advantage with practical questions. These textbook solutions help students in exams as well as their ncert solutions class 10th chemistry chapter 5 act homework routine. The chapter lays emphasis on the various types of chemical reactions and their symbolic representation. The chemical reactions discussed in the ncert solutions class 10th chemistry chapter 5 act, Chemical Reactions and Equations are combination reaction, decomposition reactiondisplacement reaction, double displacement reaction and oxidation and reduction reaction.
Each type of reaction is explained using suitable examples along with their applications in daily life. The concepts like corrosion and rancidity are also mentioned in the ncert solutions class 10th chemistry chapter 5 act, Chemical Reactions and Equations.
The entire discussion is supplemented with examples, activities and diagrammatic representation of the concepts. Summarization of all the important points of the chapter is given at the end followed by exercises consisting of 20 different questions.
The chapter covers the chemical properties of acids and bases along with appropriate examples. Emphasis is laid upon the reactions of acids and bases with metals, with each other and in water solution. Apart from this, the chapter, Acids, Bases and Salts covers the explanation of the reaction of metal carbonates and metal hydrogen carbonates with acids and reaction of metallic oxides and non-metallic oxides with acids and bases respectively.
The concept of pH is extensively covered along with its importance in daily life. The chapter, Acids, Bases and Salts deals with the concept of salts and important chemicals like washing soda, baking soda. The properties of crystals of salts are also covered in ncert solutions class 10th chemistry chapter 5 act chapter.
The chapter is filled with many examples, activities and diagrams making the chapter more readable. A recap of all the important points of the chapter, Acids, Bases and Salts is presented at the end of the discussion followed by a set of questions to assess the understanding of the concept.
Science NCERT Grade 10, Chapter 3, Metals and Non-metals as the name suggests, deals with the concepts associated with the physical and chemical properties of metals and non-metals. The chapter covers the physical properties of metals and non-metals and classifies them on the basis of few properties like lustre, ductility, malleability, conductivity.
The chapter, Metals and Non-metals successfully quench the curiosity over questions like how do metals react when burnt in air, the action of steam on metals, the action of water on metals. The concepts like reactivity series, electronic configuration of elements, properties of ionic compounds, extraction of metals are explained in detail along with suitable examples and activities.
The chapter, Metals and Non-metals also include topics such as refining of metals, corrosion of metals and its prevention. Summarization of all the important points of the chapter is mentioned at the end.
The assessment of understanding of the concept of the chapter is done through exercises consisting of different questions. The significance of carbon is explained by discussing its physical and chemical properties along with other important concepts associated with carbon. The concept of the formation of the covalent bond is covered in the chapter, Carbon and its Compounds. Apart from this, allotropes of carbon and organic compounds are explained in.
Subsequently, the chapter, Carbon and its Compounds lays emphasis on the saturated and unsaturated carbon compounds. The chemical properties of carbon compounds like combustionoxidationncert solutions class 10th chemistry chapter 5 act and substitution are discussed in.
Important compounds like ethanol and ethanoic acids are also mentioned in the chapter, Carbon and its Compounds. The concept of soaps and detergents is also covered thoroughly. The chapter contains examples, diagrams, activities and chemical equations wherever required to make the concepts easier to understand. The chapter consists of a summary of the discussion followed by a set of questions to test the basic understanding of the chapter, Carbon and its Compounds.
The chapter talks about different methods to classify the elements. The methods of classification of elements like Dobereiner triads and Newland ' s law of orders are discussed. Apart from this, Ncert solutions class 10th chemistry chapter 5 act 's periodic table classifying the elements on the basis of their atomic mass is taken ncert solutions class 10th chemistry chapter 5 act consideration.
The achievements and drawbacks of the Mendeleev's classification are mentioned in the chapter, Periodic Classification of Elements. Subsequently, the focus is given on the concepts involved in the modern periodic table. Explanation of the trends in the modern periodic table along with the position of elements is covered in a comprehensive manner. Each section is supplemented with ample examples and activities along with diagrammatic representation.
Every section ends with a set of few questions to test the topic wise understanding of the chapter, Periodic Classification of Elements. All the important points of the discussion are summarized at the end of the chapter. Overall assessment of the chapter is done through exercises consisting of questions such as MCQs and descriptive questions. The concept of nutrition is explained in detail along with a note on the autotrophic and heterotrophic mode of nutrition in case of animals and plants.
The significant processes like respirationtranspiration and excretion in humans and other organisms are explained thoroughly with the help of schematic view of each. Apart from this, the importance of each of the above life processes is also included in the discussion. The terms like dental cariesartificial kidneys and organ donation are also mentioned in the chapter, Life Processes.
Each section is enriched with examples, activities and figures making it more interactive. A set of few questions at the end of each section checks the understanding of the concepts. The chapter, Life Processes ends with a summary.
Conceptual knowledge of the chapter is tested with the help of exercises consisting of 13 questions in the form of MCQs and descriptive questions. The important aspects related to coordinated and controlled movements in plants and animals are covered under different topics of the chapter.
The entire mechanism of the human brain is explained with the help of its diagrammatic representation. Important parts of the human brain like neuron and the neuromuscular junction is also shown in the chapter, Control and Coordination.
The controlled and coordinated response in case of plants is also covered in detail in the chapter. The concept of hormones is also included in the chapter, Control and Coordination. Every section ends with a set of few questions to test the topic wise understanding of the chapter, Control and Coordination.
Overall assessment of the chapter is done through exercises consisting of 13 different questions such as MCQs and descriptive questions. The chapter, How do Organisms Reproduce? The process of reproduction, such as fissionregenerationfragmentationbuddingvegetative propagation and spore formation is explained with the help of suitable ncert solutions class 10th chemistry chapter 5 act. Sexual reproduction in case of plants and animals are separately and extensively covered in the chapter along with the diagrammatic representation of the reproductive parts of plants and animals.
Each section is supplemented with examples and activities along with labelled diagrams. Every section ends with a set of few questions to test the topic wise understanding of the chapter, How do Organisms Reproduce? Overall assessment of the chapter, How do Organisms Reproduce?
The concepts such as accumulation of variation during reproduction, creation of diversity over succeeding generations and inherited traits are covered in. Apart from this, Mendel's rules of inheritance of traits are also explained. The process of sex determination of a child is extensively covered along with suitable diagrams. The term speciation is defined in the chapter.
Every section ends with a set of few questions to test the topic wise understanding of the chapter, Heredity and Evolution. Overall assessment of the chapter, Heredity and Evolution is done through exercises consisting of 12 different questions such as MCQs and descriptive questions. Science NCERT Grade 10, Chapter 10, Light - Reflection and Refraction deals with the phenomena of reflection of light and refraction of light using the straight-line propagation of light.
The chapter, Light-Reflection and Refraction cover the understanding of some optical phenomenon in nature. The concept of reflection and refraction of light and their applications in the real world is explained using examples and diagrams. The image formation of objects is presented in the form of ray diagrams for spherical mirrors as well as spherical lenses.
The terms like diffraction of light and optical densities are also mentioned in the chapter. Focus is given on the power of lenses. Each concept contains formula and solved numericals so as to make the understanding of the concept clearer. Every section ends with a set of few questions to test the topic wise understanding of the chapter, Light-Reflection and Refraction.
Overall assessment of the chapter, Light-Reflection and Refraction is done through exercises consisting of 17 questions in the form of MCQs, numerical and descriptive questions. Science NCERT Grade 10, Chapter 11, Human Eye and Colourful World talks about some of the optical phenomena in nature and discusses few natural phenomena like rainbow formation, twinkling of stars, blue colour of the sky, redness of the sun during sunrise and sunset.
Apart from this, the concepts like Tyndall effect, scattering of light and dispersion of light is also covered in the chapter. A detailed and diagrammatic explanation of the human eye is included. Important parts of the human eye like pupil, cornea, retina, iris etc are explained along with their importance. The chapter, Human Eye and Colourful World discusses the three defects of vision - myopia, hypermetropia and presbyopia along with its correction using lenses.
Every section ends with a set of few questions to test the topic wise understanding of the chapter, Human Eye and Colourful World. Overall assessment of the chapter is done through exercises consisting of 13 questions in the form of MCQs, numerical and descriptive questions.
Science NCERT Grade 10, Chapter 12, Electricity gives an insight into the phenomenon of flow of electric current and heating effects of electric current along with its applications. Apart from this, the concept of electric power is also discussed.
Each section of the chapter, Electricity is supplemented with ample examples and activities along with diagrammatic representation wherever required. Every section ends with a set of few questions to test the topic wise understanding of the concepts. Overall assessment of the chapter, Electricity is done through exercises consisting of questions such as MCQs, numericals and descriptive questions.
The chapter focuses on the study about electromagnets and an electric motor which involves the magnetic effect of electric current and electric generators which involves the electric effect of moving magnets. Focus is given on the explanation of the magnetic field in a straight conductorin a circular loop and in a solenoid carrying electric current.
The concept of electromagnetic induction is also taken into consideration in the chapter, Magnetic Effects of Electric Current.
Understanding of each concept covered in the chapter is enriched with the help of examples, activities, figures and circuit diagrams wherever required. The numerical questions following each section make the ncert solutions class 10th chemistry chapter 5 act of the concepts clearer.
All the important parts of the discussion are presented at the end of the ncert solutions class 10th chemistry chapter 5 act in the form of a summary. The chapter, Magnetic Effects of Electric Current includes a set of 18 different questions in the form of MCQs, numericals, short answer questions and long answer questions to assess the overall understanding of the concepts.
A detailed discussion on conventional sources of energy under the topics of fossil fuels, thermal power ncert solutions class 10th chemistry chapter 5 act and hydropower plant is given in the chapter.
The concepts of conventional sources of energy are explained under solar energy, geothermal energy, nuclear energy and energy from the sea.
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These elements were segregated from one another on the basis of whether they were gases, metals or non-metals. A German chemist, known to all as Johann Wolfgang Dobereiner, had attempted to group elements based on their properties.
Formation of these groups was known as triads. In this section of the periodic classification of elements in Class 10 solutions, learn about how in this table, every eighth element displays properties that are similar to the first one. This law may appear in the examination so students will need to memorise it thoroughly.
In this section of the periodic classification of elements of class 10 NCERT solutions, an introduction to Mendeleev's periodic table has been provided.
In this table, elements were arranged, based on their increasing atomic masses. This periodic table present in Class 10 Science Chapter 5 NCERT solutions was able to predict the existence of certain elements that back then had not been discovered back then. Hydrogen in this table does not have a fixed position, and Mendeleev also fails to provide any explanation regarding the atomic masses being in the wrong order for some elements.
Elements present in this table of Class 10 Periodic Classification of Elements solutions have been arranged on the basis of their increasing atomic masses. Students will need to learn the order of the elements in this periodic table for their examinations. This modern periodic table that we find in Class 10 Science Ch 5 solutions, consists of 7 periods and 18 groups.
Elements in a period are set on the basis on the maximum number of electrons present. There are different trends in the modern periodic table that have been noticed, which students will learn about in this section.
These sols are quite stable because of the strong attractive forces between the particles of dispersed phase and dispersion medium. These sols are less stable than the lyophilic sols. Explain what is observed when : i a beam of light is passed through colloidal sol ii an electrolyte NaCl is added to ferric hydroxide sol iii electric current is passed through a colloidal sol? Delhi , ; Outside Delhi, , Solution: i The path of light as well as the colloidal particles become visible because of Tyndall effect.
When a beam of light is passed through a true solution, no scattering of light takes place. When the same beam of light is passed through a colloidal solution, scattering of light takes place. The visibility of dust particles in a semi darkened room, when a beam of sunlight enters or when a beam of light is thrown from a projector, are familiar examples of this scattering.
As a result, they get coagulated. What are emulsions? What are their different types? Give example of each type. Solution: Emulsions: It is a colloidal system in which both the dispersed phase and the dispersion medium are liquids, e.
Types of emulsions: a Oil-in-water type in which small droplets of an oil are dispersed in water, e. How do emulsifires stabilise emulsion? Name two emulsifiers. Solution: The role of an emulsifier in stabilising an emulsion can be explained in two ways: a It is believed that an emulsifier gets concentrated at the oil-water interface i.
It forms a protective coating around each drop of oil and thus, prevents the oil drop from coming in contact with one another.
The oil drops remain suspended in water and are not coagulated. Just as a lubricant reduces the friction in the various parts of machine, an emulsifier also tries to reduce the interfacial tension between oil and water by suitable means. Thus, oil and water remain in company of each other and do not get separated. The commonly used emulsifying agents are soaps, detergents, lyophilic colloids, proteins, gums, gelatin, caesin, agar etc.
Action of soap is due to emulsification and micelle formation. The RCOO � ions are, therefore, present on the surface with their COO � groups in water and the hydrocarbon chains R staying away from it and remain at the surface. But at critical micelle concentration, the anions are pulled into the bulk of the solution and aggregate to form a spherical shape with their hydrocarbon chains pointing towards the centre of the sphere with COO � part remaining outward on the surface of the sphere.
The cleansing action of soap is due to the fact that soap molecules form micelle around the oil droplet in such a way that hydrophobic part of the stearate ions is in the oil droplet and hydrophilic part projects out of the grease droplet like the bristles. Since the polar groups can interact with water, the oil droplet surrounded by stearate ions is now pulled in Water and removed from the dirty surface.
Thus soap helps in emulsification and washing away of oils and fats. The negatively charged sheath around the globules prevents them from coming together and forming aggregates.
Give four examples of heterogeneous catalysis. Solution: In heterogeneous catalysis, the catalyst is present in a different phase than that of the reactants,e. What do you mean by activity and selectivity of catalysts? Solution: Important features of solid catalyst: a Activity: The activity of a catalyst is its ability to accelerate chemical reactions.
It depends upon the strength of chemisorption to a large extent. The catalytic activity of a metal for hydrogenation increases as we move from Group 5 metals to Group The maximum activity is shown by metals of Groups 7, 8 and 9.
It mean a substance which acts as a catalyst in one reaction may not act as a catalyst in other reaction e. Question Describe some features of catalysis by zeolites. Solution: a Zeolites are hydrated aluminosilicates which have a three dimensional network structure containing water molecules in their pores.
What is shape selective catalysis? Solution: The catalytic reaction that depends upon the pore structure of the catalyst and the size of the reactant and product molecules is called shape-selective catalysis. Zeolites are good shape-selective catalysts because of their honeycomb-like structures. They are microporous aluminosilicates with three dimensional network of silicates in which some silicon atoms are replaced by aluminium atoms giving Al-O-Si framework.
The reactions taking place in zeolites depend upon the size and shape of reactant and product molecules as well as upon the pores and cavities of the zeolites. They are found in nature as well as synthesised for catalytic selectivity. Solution: i Electrophoresis : Refer answer number 15 iii. If somehow, the charge is removed, the particles will come nearer to each other to form aggregates or coagulate and settle down under the force of gravity.
The process of settling down of colloidal particles is called coagulation. Since particles ions or smaller molecules in a true solution can pass through animal membrane bladder or parchment paper or cellophane sheet but not the colloidal particles, the membrane can be used for dialysis. The apparatus used for this purpose is called dialyser. A bag of suitable membrane containing the colloidal solution is suspended in a vessel through which fresh water is continuously flowing.
The molecules and ions diffuse through membrane into the outer water and pure colloidal solution is left behind. Give four uses of emulsions. What are micelles? Give an example of a micelle system. Solution: Micelles are substances that behave as normal strong electrolytes at low concentration but at high concentrations behave as colloids due to formation of aggregates. They are also called associated colloids, e.
They can form ions and may contain or more molecules to form a micelle. Solution: i Alcosol : The sol in which alcohol is used as dispersion medium is called alcosol e. Space Travel D. Heroes of the Environment C. A Tale of Three Villages E. Land of All Seasons B. Eco Tourism C. The Emerald Islands D.
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