CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations MCQs

CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations, introduces students to the fascinating world of chemistry. In this chapter, students learn about the process of chemical reactions, where substances change to form new products. These changes are explained through chemical equations, which are symbolic representations of the reactions. Understanding how to write and balance these equations is key to mastering the chapter and performing well in exams.

The chapter covers various types of chemical reactions, such as combination, decomposition, displacement, and double displacement reactions. Each type of reaction follows specific patterns, and knowing these patterns helps in predicting the products and reactants. The chemical reactions and equations class 10 mcq questions focus on these key concepts, testing your understanding of how substances interact and transform during reactions.

In addition to identifying different types of chemical reactions, students are also taught to balance chemical equations. The law of conservation of mass is central to this process, which states that matter cannot be created or destroyed in a chemical reaction. Class 10 Chemical Reactions and Equations MCQ questions often assess your ability to balance these equations, ensuring that the number of atoms on both sides of the equation remains the same.

To further strengthen your understanding, practicing MCQs on Chemical Reactions and Equations is a great way to test your knowledge. These MCQs not only help revise theoretical concepts but also provide insight into practical applications of chemical reactions in everyday life. By regularly solving MCQ Chapter 1 Class 10 Science questions, students can improve their problem-solving skills and ensure they understand the real-world implications of these reactions.

For thorough preparation, using resources like 100 MCQ of Chemical Reactions and Equations with Answers provides a wide range of questions with answers and explanations. These resources help clarify doubts, making sure that students understand every aspect of chemical reactions. Whether you are learning how to predict reaction products or balance complex equations, these MCQs will help you become more confident in your knowledge.

Class 10 Science Chapter 1 MCQs

Question: Which of the following is not a chemical change?

a) Burning of paper

b) Melting of ice

c) Rusting of iron

d) Digestion of food

Answer: b) Melting of ice

Question: In a chemical reaction, the substances before the reaction are called:

a) Reactants

b) Products

c) Elements

d) Compounds

Answer: a) Reactants

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Question: Which of the following is a balanced chemical equation?

a) H₂ + O₂ → H₂O

b) Fe + O₂ → Fe₂O₃

c) CaCO₃ → CaO + CO₂

d) HCl + NaOH → NaCl + H₂O

Answer: d) HCl + NaOH → NaCl + H₂O

Question: What type of reaction is represented by the equation: 2H₂ + O₂ → 2H₂O?

a) Combination reaction

b) Decomposition reaction

c) Displacement reaction

d) Double displacement reaction

Answer: a) Combination reaction

Question: Which of the following is a decomposition reaction?

a) 2H₂O → 2H₂ + O₂

b) 2Na + Cl₂ → 2NaCl

c) CaCO₃ → CaO + CO₂

d) AgNO₃ + NaCl → AgCl + NaNO₃

Answer: c) CaCO₃ → CaO + CO₂

Question: What is the product of the reaction between magnesium (Mg) and hydrochloric acid (HCl)?

a) Mg(OH)₂ + H₂

b) MgCl₂ + H₂

c) MgO + H₂O

d) MgCO₃ + H₂

Answer: b) MgCl₂ + H₂

Question: What happens to the mass during a chemical reaction?

a) It increases

b) It decreases

c) It remains the same

d) It varies

Answer: c) It remains the same

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Question: Which of the following statements is true about exothermic reactions?

a) They absorb heat

b) They release heat

c) They occur at low temperatures

d) They require energy input

Answer: b) They release heat

Question: Which of the following represents a single displacement reaction?

a) FeS + 2HCl → FeCl₂ + H₂S

b) Na₂SO₄ + BaCl₂ → 2NaCl + BaSO₄

c) 2H₂O → 2H₂ + O₂

d) 2AgNO₃ + Zn → Zn(NO₃)₂ + 2Ag

Answer: d) 2AgNO₃ + Zn → Zn(NO₃)₂ + 2Ag

Question: What is the product of the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl)?

a) NaCl + H₂O

b) NaOH + HCl

c) Na₂Cl + H₂O

d) NaOH + H₂

Answer: a) NaCl + H₂O

Question: What is the product of the reaction between magnesium (Mg) and hydrochloric acid (HCl)?

a) Mg(OH)2 + H2

b) MgCl2 + H2

c) MgO + H2O

d) MgCO3 + H2

Answer: b) MgCl2 + H2

Question: What happens to the mass during a chemical reaction?

a) It increases

b) It decreases

c) It remains the same

d) It varies

Answer: c) It remains the same

Question: Which of the following statements is true about exothermic reactions?

a) They absorb heat

b) They release heat

c) They occur at low temperatures

d) They require energy input

Answer: b) They release heat

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Question: Which of the following represents a single displacement reaction?

a) FeS + 2HCl → FeCl2 + H2S

b) Na2SO4 + BaCl2 → 2NaCl + BaSO4

c) 2H2O → 2H2 + O2

d) 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

Answer: d) 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

Question: What is the product of the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl)?

a) NaCl + H2O

b) NaOH + HCl

c) Na2Cl + H2O

d) NaOH + H2

Answer: a) NaCl + H2O

Question: Which gas is evolved when zinc metal reacts with dilute sulfuric acid (H2SO4)?

a) Oxygen

b) Hydrogen

c) Carbon dioxide

d) Sulfur dioxide

Answer: b) Hydrogen

Question: What is the general formula for a neutralization reaction?

a) Acid + Metal → Salt + Hydrogen gas

b) Acid + Metal Oxide → Salt + Water

c) Acid + Base → Salt + Water

d) Acid + Carbonate → Salt + Water + Carbon dioxide

Answer: c) Acid + Base → Salt + Water

Question: What is the product formed when copper (II) oxide reacts with sulfuric acid (H2SO4)?

a) CuSO4 + H2O

b) Cu(OH)2 + H2O

c) CuSO4 + O2

d) CuO + H2O

Answer: a) CuSO4 + H2O

Question: What is the chemical formula of sodium chloride?

a) NaCl

b) Na2Cl

c) NaCl2

d) Na2Cl2

Answer: a) NaCl

Question: Which of the following statements is true about combustion reactions?

a) They involve the reaction of a metal with an acid

b) They involve the reaction of a non-metal with oxygen

c) They involve the reaction of a base with an acid

d) They involve the reaction of an acid with a carbonate

Answer: b) They involve the reaction of a non-metal with oxygen

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Question: What type of reaction is represented by the equation: 2Na + Cl₂ → 2NaCl?

a) Combination reaction

b) Decomposition reaction

c) Displacement reaction

d) Double displacement reaction

Answer: c) Displacement reaction

Question: What is the chemical formula of sulfur dioxide?

a) SO₂

b) SO₃

c) H₂SO₄

d) H₂SO₃

Answer: a) SO₂

Question: Which of the following is an example of a redox reaction?

a) CaCO₃ → CaO + CO₂

b) 2Na + Cl₂ → 2NaCl

c) Fe + S → FeS

d) Zn + 2HCl → ZnCl₂ + H₂

Answer: d) Zn + 2HCl → ZnCl₂ + H₂

Question: What type of reaction is represented by the equation: CH₄ + 2O₂ → CO₂ + 2H₂O?

a) Combination reaction

b) Decomposition reaction

c) Displacement reaction

d) Combustion reaction

Answer: d) Combustion reaction

Question: What is the product formed when sodium carbonate (Na₂CO₃) reacts with hydrochloric acid (HCl)?

a) NaCl + CO₂

b) NaCl + H₂O + CO₂

c) Na₂Cl + H₂O + CO₂

d) NaHCO₃ + Cl₂

Answer: b) NaCl + H₂O + CO₂

Question: Which of the following is an example of a synthesis reaction?

a) CH₄ + 2O₂ → CO₂ + 2H₂O

b) CaCO₃ → CaO + CO₂

c) 2H₂O → 2H₂ + O₂

d) 2H₂ + O₂ → 2H₂O

Answer: a) CH₄ + 2O₂ → CO₂ + 2H₂O

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Question: What is the product of the reaction between magnesium oxide (MgO) and hydrochloric acid (HCl)?

a) MgCl₂ + H₂

b) Mg(OH)₂ + HCl

c) MgCl₂ + H₂O

d) Mg(OH)₂ + H₂O

Answer: c) MgCl₂ + H₂O

Question: What is the chemical formula of calcium oxide?

a) CaO

b) Ca(OH)₂

c) CaCO₃

d) CaSO₄

Answer: a) CaO

Question: Which gas is produced when zinc carbonate (ZnCO₃) decomposes upon heating?

a) Oxygen

b) Hydrogen

c) Carbon dioxide

d) Sulfur dioxide

Answer: c) Carbon dioxide

Question: What is the product formed when sulfur dioxide (SO₂) reacts with water (H₂O)?

a) H₂SO₄

b) H₂SO₃

c) H₂S

d) H₂O₂

Answer: b) H₂SO₃

Question: Which of the following is an example of a precipitation reaction?

a) 2Na + Cl₂ → 2NaCl

b) CaCO₃ → CaO + CO₂

c) Na₂SO₄ + BaCl₂ → 2NaCl + BaSO₄

d) 2H₂O → 2H₂ + O₂

Answer: c) Na₂SO₄ + BaCl₂ → 2NaCl + BaSO₄

Question: What is the product formed when hydrogen peroxide (H₂O₂) decomposes?

a) H₂O

b) O₂

c) H₂O + O₂

d) H₂ + O₂

Answer: c) H₂O + O₂

Question: What is the chemical formula of hydrochloric acid?

a) HCl

b) H₂SO₄

c) HNO₃

d) H₂O₂

Answer: a) HCl

Question: Which of the following is an example of a neutralization reaction?

a) CaCO₃ → CaO + CO₂

b) 2Na + Cl₂ → 2NaCl

c) HCl + NaOH → NaCl + H₂O

d) 2H₂O → 2H₂ + O₂

Answer: c) HCl + NaOH → NaCl + H₂O

Question: What is the product formed when potassium hydroxide (KOH) reacts with sulfuric acid (H₂SO₄)?

a) K₂SO₄ + H₂O

b) K₂SO₄ + H₂SO₄

c) KOH + H₂SO₄

d) KHSO₄ + H₂O

Answer: a) K₂SO₄ + H₂O

Benefits of Solving Chemical Reactions and Equations Class 10 MCQs

1. Improves Concept Understanding: Solving Chemical Reactions and Equations Class 10 MCQs helps you understand key concepts like types of reactions (combination, decomposition, displacement, etc.), balancing chemical equations, and the law of conservation of mass. MCQs break down these concepts into simpler parts, making it easier to grasp the fundamental ideas.
2. Enhances Problem-Solving Skills: By regularly practicing MCQs on Chemical Reactions and Equations, you sharpen your ability to solve problems efficiently. These questions often test different aspects of the chapter, allowing you to become proficient at quickly identifying the correct approach to solve problems in exams.
3. Boosts Exam Confidence: Class 10 Chemical Reactions and Equations MCQ questions give you a real-time experience of the types of questions that can appear in exams. The more MCQs you solve, the more confident you become in tackling the exam paper, which helps reduce exam anxiety.
4. Reinforces Learning and Retention: Repetition plays a key role in learning. When you practice Class 10 Science Chapter 1 MCQs repeatedly, you reinforce the concepts in your mind, which leads to better retention. The more you test yourself, the better you remember the details when it matters most.
5. Helps in Time Management: Working through MCQs Science Class 10 Chapter 1 trains you to manage your time effectively. Since MCQs are typically time-bound, solving them regularly prepares you to answer questions quickly during exams, improving your speed and accuracy.
6. Identifies Weak Areas: When you solve MCQs on Chemical Reactions and Equations, it becomes easier to identify which areas of the chapter you are weak in. Whether it's balancing equations, understanding the types of reactions, or predicting products, practicing MCQs highlights the sections you need to focus more on.
7. Helps in Objective-type Question Preparation: The format of MCQ Chapter 1 Class 10 Science questions mirrors objective-type questions that appear in exams. Practicing these helps you become familiar with the format and structure of the questions, making it easier to answer them correctly in the actual exam.
8. Provides Instant Feedback: With 100 MCQ of Chemical Reactions and Equations with Answers, you get instant feedback after solving each question. This helps you understand what you did right or wrong, allowing you to improve your approach and avoid making the same mistakes in the future.
9. Strengthens Chemical Equation Writing: Solving MCQs on balancing chemical equations improves your ability to write and balance chemical reactions. Since many MCQs require you to balance equations, you develop better skills in ensuring the conservation of mass, which is crucial in chemistry.
10. Supports Revision: Solving MCQs is an excellent way to revise the entire chapter. Whether you're reviewing for a test or final exams, practicing MCQs on Chemical Reactions and Equations helps you cover all topics in a short time, making it an efficient revision tool.