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Chapters
Chapter 2: Acids, Bases and Salts
Chapter 3: Metals and Non-metals
Chapter 4: Carbon and its Compounds
Chapter 5: Periodic Classification of Elements
Chapter 6: Life Processes
Chapter 7: Control and Coordination
Chapter 8: How do Organisms Reproduce?
Chapter 9: Heredity and Evolution
Chapter 10: Light – Reflection and Refraction
Chapter 11: The Human Eye and the Colourful World
Chapter 12: Electricity
Chapter 13: Magnetic Effects of Electric Current
Chapter 14: Sources of Energy
Chapter 15: Our Environment
Chapter 16: Sustainable Management of Natural Resources
Solutions for Chapter 1: Chemical Reactions and Equations
Below listed, you can find solutions for Chapter 1 of CBSE NCERT for Class 10 Science.
NCERT solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations Intext Questions [Page 6]
Why should a magnesium ribbon be cleaned before it is burnt in air?
Write the balanced equation for the following chemical reaction
Hydrogen + Chlorine → Hydrogen chloride
Write the balanced equation for the following chemical reaction
Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride
Write the balanced equation for the following chemical reaction
Sodium + Water → Sodium hydroxide + Hydrogen
Write a balanced chemical equation with state symbols for the following reaction.
Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
Write a balanced chemical equation with state symbols for the following reaction.
Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
NCERT solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations Intext Questions [Page 10]
A solution of a substance ‘X’ is used for white washing.
(i) Name the substance ‘X’ and write its formula.
(ii) Write the reaction of the substance ‘X’ named in (i) above with water.
Why is the amount of gas collected in one of the test tubes in the following Activity double of the amount collected in the other? Name this gas.
• Take a plastic mug. Drill two holes at its base and fit rubber stoppers in these holes. Insert carbon electrodes in these rubber stoppers as shown in the following Fig.
• Connect these electrodes to a 6 volt battery.
• Fill the mug with water such that the electrodes are immersed. Add a few drops of dilute sulphuric acid to the water.
• Take two test tubes filled with water and invert them over the two carbon electrodes.
• Switch on the current and leave the apparatus undisturbed for some time.
• You will observe the formation of bubbles at both the electrodes. These bubbles displace water in the test tubes.
• Is the volume of the gas collected the same in both the test tubes?
• Once the test tubes are filled with the respective gases, remove them carefully.
• Test these gases one by one by bringing a burning candle close to the mouth of the test tubes.
NCERT solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations Intext Questions [Page 13]
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Give an example of a double displacement reaction other than the one given in the following Activity.
•Take about 3 mL of sodium sulphate
solution in a test tube.
• In another test tube, take about 3 mL of
barium chloride solution.
• Mix the two solutions given in the following fig.
• What do you observe?
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
4Na (s) + O2 (g) → 2Na2O (s)
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
CuO (s) + H2 (g) → Cu (s) + H2O (l)
NCERT solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations Exercises [Pages 14 - 16]
1. Which of the statements about the reaction below are incorrect?
2PbO (s) + C (s) → 2Pb (s) + CO2 (g)
(a) Lead is getting reduced.
(b) Carbon dioxide is getting oxidised.
(c) Carbon is getting oxidised.
(d) Lead oxide is getting reduced.
(a) and (b)
(a) and (c)
(a), (b) and (c)
all
Fe2O3 + 2Al → Al2O3 + 2Fe
The above reaction is an example of a
combination reaction.
double displacement reaction.
decomposition reaction.
displacement reaction.
What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer.
Hydrogen gas and Iron chloride are produced.
Chlorine gas and Iron hydroxide are produced.
No reaction takes place.
Iron salt and water are produced.
What is a balanced chemical equation? Why should a chemical equation be balanced?
Translate the following statements into chemical equations and then balance them.
- Hydrogen gas combines with nitrogen to form ammonia
Translate the following statements into chemical equations and then balance them.
- Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
Translate the following statement into chemical equation and then balance them.
- Barium chloride reacts with aluminium sulphate to give aluminium chloride and barium sulphate.
Translate the following statements into chemical equations and then balance them.
- Potassium metal reacts with water to give potassium hydroxide and hydrogen gas
Balance the chemical equation.
HNO3 + Ca(OH)2 → Ca(NO3)2 + H2O
Balance the following chemical equation.
NaOH+H2SO4→Na2SO4+H2O
Balance the following chemical equation.
NaCl+AgNO3→AgCl+NaNO3
Balance the following chemical equation.
BaCl2 + H2SO4 → BaSO4 + HCl
Write the balanced chemical equation for the following reaction.
Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
Write the balanced chemical equation for the following reaction.
Zinc + Silver nitrate → Zinc nitrate + Silver
Write the balanced chemical equations for the following reaction.
Aluminium + Copper chloride → Aluminium chloride + Copper
Write the balanced chemical equation for the following reaction.
Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride
Write the balanced chemical equation for the following and identify the type of reaction
Potassium bromide (aq) + Barium iodide (aq) → Potassium iodide (aq) + Barium bromide(s)
Write the balanced chemical equation for the following and identify the type of reaction
Zinc carbonate (s) → Zinc oxide (s) + Carbon dioxide (g)
Write the balanced chemical equation for the following and identify the type of reaction
Hydrogen (g) + Chlorine (g) → Hydrogen chloride (g)
Write the balanced chemical equation for the following and identify the type of reaction
Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g)
What does one mean by endothermic reaction? Give example.
Why is respiration considered an exothermic reaction? Explain.
Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.
What do you mean by a precipitation reaction? Explain by giving examples.
Explain the following in term of gain or loss of oxygen with two examples.
Oxidation
Explain the following in term of gain or loss of oxygen with two examples.
Reduction
A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed
Why do we apply paint on iron articles?
Oil and Fat containing food items are flushed with Nitrogen. Why?
Explain the terms Corrosion
Explain the term Rancidity.
Solutions for Chapter 1: Chemical Reactions and Equations
NCERT solutions for Class 10 Science chapter 1 - Chemical Reactions and Equations
Shaalaa.com has the CBSE Mathematics Class 10 Science CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Class 10 Science CBSE 1 (Chemical Reactions and Equations) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Class 10 Science chapter 1 Chemical Reactions and Equations are Chemical Equation, Direct Combination (or Synthesis) Reaction, Decomposition Reactions, Types of Chemical Change or Chemical Reaction, Balancing Chemical Equation, Single Displacement Reactions, Double Displacement Reaction, Oxidation, Reduction and Redox Reactions, Corrosion of Metals and Its Prevention, Rancidity of Food and Its Prevention, Chemical Equation, Direct Combination (or Synthesis) Reaction, Decomposition Reactions, Types of Chemical Change or Chemical Reaction, Balancing Chemical Equation, Single Displacement Reactions, Double Displacement Reaction, Oxidation, Reduction and Redox Reactions, Corrosion of Metals and Its Prevention, Rancidity of Food and Its Prevention.
Using NCERT Class 10 Science solutions Chemical Reactions and Equations exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Solutions are essential questions that can be asked in the final exam. Maximum CBSE Class 10 Science students prefer NCERT Textbook Solutions to score more in exams.
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