NCERT Solutions for Class 10 Science - PCB

Q: Question 1. What happens when dilute hydrochloric acid is added to iron filings? A. Hydrogen gas and iron chloride are produced B. Chlorine gas and iron hydroxide are produced C. No reaction takes place D. Iron salt and water are produced

Answer: When dilute HCl is added to iron fillings the reaction proceeds as: 2HCl+Fe→FeCl2+H2(g) In the reaction hydrogen gas and iron chloride are produced.

Q: Question 2. What is a balanced chemical equation? Why should chemical equations be balanced?

Answer: A balanced chemical reaction is an equation that have equal numbers of each type of atom on both sides of the arrow. A chemical equation is a written symbolic representation of a chemical reaction. The reactant chemical(s) are given on the left-hand side and the product chemical(s) on the right-hand side. The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, so the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products.

Q: Question 3. Why is respiration considered an exothermic reaction? Explain.

Answer: Respiration is a burning process of food in body to produce energy. Respiration is considered as an exothermic reaction because, in respiration process, oxidation of glucose takes place which produces a large amount of heat energy which stored in the form of ATP. This is shown in following chemical equation C6H12O6+6O2→6CO2+H2O+energy (ATP)

Q: Question 4. Why do we apply paint on iron articles?

Answer: Paint is applied to the iron articles to prevent them from corrosion by rust. Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Paint prevents iron from getting exposed to air and moisture.

Table of content

1 NCERT Solutions for Class 10 Science – Physics, Chemistry, Biology

1.1 NCERT Solutions for Class 10 Science Chapter-wise

1.2 CBSE Class 10 Science Chapter-wise NCERT Solutions

1.3 NCERT Solutions for Class 10 Science Chapter 1 – Chemical Reactions and Equations

1.4 NCERT Solutions for Class 10 Science Chapter 2 – Acid Bases and Salt

1.5 NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-Metals

1.6 NCERT Solutions for Class 10 Science Chapter 4 – Carbon and its Compounds

1.7 NCERT Solutions for Class 10 Science Chapter 5 – Periodic Classification of Elements

1.8 NCERT Solutions for Class 10 Science Chapter 6 – Life Processes

1.9 NCERT Solutions for Class 10 Science Chapter 7 – Control and Coordination

1.10 NCERT Solutions for Class 10 Science Chapter 8 – How Do Organisms Reproduce

1.11 NCERT Solutions for Class 10 Science Chapter 9 – Heredity and Evolution

1.12 NCERT Solutions for Class 10 Science Chapter 10 – Light Reflection and Refraction

1.13 NCERT Solutions for Class 10 Science Chapter 11 – Human Eye and Colourful world

1.14 NCERT Solutions for Class 10 Science Chapter 12 – Electricity

1.15 NCERT Solutions for Class 10 Science Chapter 13 – Magnetic Effects of Electric Current

1.16 NCERT Solutions for Class 10 Science Chapter 14 – Sources of Energy

1.17 NCERT Solutions for Class 10 Science Chapter 15- Our Environment

1.18 NCERT Solutions for Class 10 Science Chapter 16 – Management of Natural Resources

1.19 Download Toppr – Best Learning App Class 5 to Class 12

NCERT Solutions for Class 10 Science – Physics, Chemistry, Biology

Science has its own history of completely transforming the entire world that we live in. Since ancient times, it’s been proved several times that Science has the capacity to revolutionize the phases of Mankind. Science is a combination of theoretical and practical knowledge and can be one of the toughest subjects to understand. In the CBSE Class 10 Science, there are crucial topics such as electricity, magnetic effects of electric current, refraction of light, etc for this we provide you NCERT Solutions for Class 10 Science.

NCERT Solutions for Class 10 Science which will help you to effectively prepare for your final examination. NCERT Solutions for Class 10 Science are prepared by subject experts. Our NCERT Solutions for Class 10 Science contain educational resources which will help you to gain a better understanding of science concepts. In NCERT Solutions for Class 10 Science, all the concepts are explained in details and all Science doubts are instantly resolved by our subject matter experts. You will also be able to understand all the difficult concepts by referring our NCERT Solutions for Class 10 Science and score good marks in your exams.

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Download NCERT Solutions for other subjects here.

NCERT Solutions for Class 10 Science Chapter-wise

CBSE Class 10 Science Chapter-wise NCERT Solutions

NCERT Solutions for Class 10 Science Chapter 1 – Chemical Reactions and Equations

In this chapter, you learn the way of writing chemical equations and balance them, types of chemical reactions, combination reaction, displacement reaction, double displacement reaction, effects of oxidation reactions, corrosion, rancidity.

NCERT Solutions for Class 10 Science Chapter 2 – Acid Bases and Salt

In this chapter you will deal with the concepts of acid, bases, and salts , different types of chemical reactions and the reaction of acid, bases, and salts with certain compounds, chemical properties of bases and acids, neutralization reaction, pH scale, importance of pH, reaction of metallic oxides, reaction of non – metallic oxide, and pH of salts .

NCERT Solutions for Class 10 Science Chapter 3 – Metals and Non-Metals

In this chapter, you will study the physical and chemical properties of metals and non-metals, the process of corrosion, the occurrence of metals in the environment and their extraction.

NCERT Solutions for Class 10 Science Chapter 4 – Carbon and its Compounds

In this chapter you will learn about the covalent bond in carbon, compounds derived from carbon, its versatile nature, chemical properties of carbon, properties of Ethanol and Ethanoic acid, soaps and detergents and their cleansing actions.

NCERT Solutions for Class 10 Science Chapter 5 – Periodic Classification of Elements

In this chapter, you will learn the arrangement of elements into the periodic table, classification of elements, Dobereiner’s triads, Newland’s law of Octaves, Mendeleev’s periodic table, the modern periodic table, metallic and non- metallic properties of elements.

NCERT Solutions for Class 10 Science Chapter 6 – Life Processes

In this chapter, you will learn about the processes of nutrition, transpiration, respiration, and excretion in plants, in animals and in humans.

NCERT Solutions for Class 10 Science Chapter 7 – Control and Coordination

In this chapter, you will study some topics in details such as the nervous system of human beings, explanation about the anatomy of the Human Brain, coordination in plant and hormones in animals.

NCERT Solutions for Class 10 Science Chapter 8 – How Do Organisms Reproduce

In this chapter, you will learn about the process of reproduction for unicellular organisms and multicellular organisms, asexual and sexual modes of reproduction, the reproductive systems of both animals and plants.

NCERT Solutions for Class 10 Science Chapter 9 – Heredity and Evolution

In this chapter, you will learn about the process of passing of genes from one generation to another, blood group formation by genes, sex determination, evolution in detail, Charles Darwin’s theory.

NCERT Solutions for Class 10 Science Chapter 10 – Light Reflection and Refraction

In this chapter, you will get to know the phenomena of reflection of plane and curved surfaces and bending at the interface of two mediums with different properties , laws of reflection and refraction , images formed by spherical mirrors, sign convention for reflection by spherical mirrors , mirror formula and magnification , refractive index , refraction by spherical Lens , its image formation , lens formula , power of lens.

NCERT Solutions for Class 10 Science Chapter 11 – Human Eye and Colourful world

In this chapter, you will learn the structure of the human eye and its functions, various eye defects such as myopia, hypermetropia, refraction through a prism, depression of white light by a glass prism, refraction through the atmosphere, Tyndall effect and Scattering of light.

NCERT Solutions for Class 10 Science Chapter 12 – Electricity

In this chapter, you will learn the concepts of electric current, circuit diagram, potential difference, resistance, the combination of resistance, heating effects of current and electrical power, constituents of electricity, current flow in an electrical circuit, Ohm’s law, resistivity, Joule’s law, electric fuse, electric power .

NCERT Solutions for Class 10 Science Chapter 13 – Magnetic Effects of Electric Current

In this chapter, you will learn about the magnetic field and field lines, magnetic field due to current carrying conductor , magnetic field due to the current through a straight conductor Right-hand thumb rule , force on a current carrying conductor placed in a magnetic field, magnetic field due to a current through a circular loop , magnetic field due to a current in a solenoid , circuits and working of electric motor and generator and electromagnetic induction , domestic electric circuits.

NCERT Solutions for Class 10 Science Chapter 14 – Sources of Energy

In this chapter, you will learn about source of energy , different forms of energy available to us such as conventional and non-conventional sources of energy , solar energy , energy from sea , geothermal energy , nuclear energy , thermal power plant , hydropower plants , improvements in technology for using conventional sources of energy and environmental consequences.

NCERT Solutions for Class 10 Science Chapter 15- Our Environment

Here you will learn the concepts of ecosystems, food chain, food web, waste management, biodegradable and non-biodegradable substances, a tropic level, biotic and abiotic components, producers, consumers, ozone formations and its depletion.

NCERT Solutions for Class 10 Science Chapter 16 – Management of Natural Resources

This chapter deals with the management of resources like forests, wildlife, water, coal, and petroleum, 5 types of R’s and methods of management of resources.

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Solved Questions For You:

Question 1. What happens when dilute hydrochloric acid is added to iron filings?

A. Hydrogen gas and iron chloride are produced

B. Chlorine gas and iron hydroxide are produced

C. No reaction takes place

D. Iron salt and water are produced

Answer: When dilute $H C l$ is added to iron fillings the reaction proceeds as:

2 H C l + F e \to F e C l_{2} + H_{2} (g)

In the reaction hydrogen gas and iron chloride are produced.

Question 2. What is a balanced chemical equation? Why should chemical equations be balanced?

Answer: A balanced chemical reaction is an equation that have equal numbers of each type of atom on both sides of the arrow.

A chemical equation is a written symbolic representation of a chemical reaction. The reactant chemical(s) are given on the left-hand side and the product chemical(s) on the right-hand side. The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, so the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products.

Question 3. Why is respiration considered an exothermic reaction? Explain.

Answer: Respiration is a burning process of food in body to produce energy. Respiration is considered as an exothermic reaction because, in respiration process, oxidation of glucose takes place which produces a large amount of heat energy which stored in the form of ATP. This is shown in following chemical equation

C_{6} H_{12} O_{6} + 6 O_{2} \to 6 C O_{2} + H_{2} O + e n e r g y

(ATP)

Question 4. Why do we apply paint on iron articles?

Answer: Paint is applied to the iron articles to prevent them from corrosion by rust. Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.

Paint prevents iron from getting exposed to air and moisture.

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