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Science Chapter 6 Physical and Chemical Changes Class 7 MCQ with Answers
Master the concepts of physical and chemical changes with our comprehensive Physical and Chemical changes class 7 MCQ questions. Chapter 6 Physical and Chemical Changes discuss about intriguing processes that alter the state and properties of materials. We have curated a detailed set of Physical and Chemical Changes MCQ questions with answers to help students gain a thorough understanding of these concepts and excel in their studies.
Our collection of class 7 science chapter 6 MCQ covers essential topics, from reversible and irreversible changes to the various types of chemical reactions. Each question is designed to align with the CBSE syllabus, ensuring that students are well-prepared and confident. Enhance your revision process with our class 7 science chapter 6 MCQ with answers, tailored to boost your learning experience and academic performance. Additionally, you can download NCERT solutions for Class 7 Science to further aid your studies. Get ready to tackle your exams with confidence using our specialized resources.
Physical and Chemical Changes Class 7 MCQ Questions with Answers
Here are all the important Physical and Chemical Changes class 7 MCQ questions wit answers:
Question 1: What is a physical change?
- a) A change where new substances are formed
- b) A change in the physical properties of a substance
- c) A change that is always irreversible
- d) A change in which the substance’s chemical properties are altered
Answer: b) A change in the physical properties of a substance
Question 2: Which of the following is a physical change?
- a) Rusting of iron
- b) Burning of wood
- c) Melting of ice
- d) Souring of milk
Answer: c) Melting of ice
Question 3: What is a chemical change?
- a) A change where the shape and size of the substance changes
- b) A change where one or more new substances are formed
- c) A change that is reversible
- d) A change in which no new substances are formed
Answer: b) A change where one or more new substances are formed
Question 4: Which of the following is a chemical change?
- a) Cutting of paper
- b) Dissolving sugar in water
- c) Burning of magnesium ribbon
- d) Melting of wax
Answer: c) Burning of magnesium ribbon
Question 5: What is the result of rusting of iron?
- a) Iron turns into water
- b) Iron forms iron oxide
- c) Iron turns into iron sulfide
- d) Iron remains unchanged
Answer: b) Iron forms iron oxide
Question 6: What kind of change is the formation of a sugar solution?
- a) Chemical change
- b) Physical change
- c) Irreversible change
- d) Permanent change
Answer: b) Physical change
Question 7: Which of the following changes is generally reversible?
- a) Chemical change
- b) Physical change
- c) Both a and b
- d) Neither a nor b
Answer: b) Physical change
Question 8: What happens when vinegar reacts with baking soda?
- a) Formation of water
- b) Formation of carbon dioxide
- c) Formation of hydrogen gas
- d) Formation of oxygen gas
Answer: b) Formation of carbon dioxide
Question 9: Which of the following is NOT a sign of a chemical change?
- a) Formation of a new substance
- b) Change in color
- c) Change in state
- d) Production of gas
Answer: c) Change in state
Question 10: How can rusting of iron be prevented?
- a) By keeping iron in the sun
- b) By painting or coating with grease
- c) By washing with water
- d) By heating the iron
Answer: b) By painting or coating with grease
Question 11: What is the process of depositing a layer of zinc on iron called?
- a) Painting
- b) Greasing
- c) Galvanization
- d) Rusting
Answer: c) Galvanization
Question 12: What type of change is boiling of water?
- a) Physical change
- b) Chemical change
- c) Irreversible change
- d) None of the above
Answer: a) Physical change
Question 13: Which property does NOT change in a physical change?
- a) Shape
- b) Size
- c) State
- d) Chemical composition
Answer: d) Chemical composition
Question 14: What is the result of burning a piece of paper?
- a) Physical change
- b) Chemical change
- c) Temporary change
- d) Reversible change
Answer: b) Chemical change
Question 15: When a candle burns, what type of changes occur?
- a) Only physical changes
- b) Only chemical changes
- c) Both physical and chemical changes
- d) No changes
Answer: c) Both physical and chemical changes
Question 16: What happens to magnesium ribbon when it burns?
- a) It forms a new substance called magnesium oxide
- b) It turns into water
- c) It evaporates without any residue
- d) It remains unchanged
Answer: a) It forms a new substance called magnesium oxide
Question 17: What type of change is involved in making curd from milk?
- a) Physical change
- b) Chemical change
- c) Reversible change
- d) None of the above
Answer: b) Chemical change
Question 18: Which of the following is a physical property?
- a) Color
- b) Reactivity
- c) Flammability
- d) Toxicity
Answer: a) Color
Question 19: Which change involves the formation of a precipitate?
- a) Dissolving salt in water
- b) Mixing vinegar and baking soda
- c) Mixing sodium sulfate and barium chloride
- d) Melting of ice
Answer: c) Mixing sodium sulfate and barium chloride
Question 20: What is the outcome of the reaction between copper sulfate and iron?
- a) Iron sulfate and copper are formed
- b) No reaction occurs
- c) Iron reacts with sulfur
- d) Copper sulfate remains unchanged
Answer: a) Iron sulfate and copper are formed
Question 21: What type of change is cutting a log of wood into pieces?
- a) Physical change
- b) Chemical change
- c) Both a and b
- d) Neither a nor b
Answer: a) Physical change
Question 22: What happens when carbon dioxide is passed through lime water?
- a) Lime water turns clear
- b) Lime water turns milky
- c) No change
- d) Lime water evaporates
Answer: b) Lime water turns milky
Question 23: What is the chemical name of baking soda?
- a) Sodium chloride
- b) Sodium bicarbonate
- c) Sodium carbonate
- d) Sodium hydroxide
Answer: b) Sodium bicarbonate
Question 24: Which process is used to obtain large crystals of pure substances from their solutions?
- a) Evaporation
- b) Crystallization
- c) Distillation
- d) Filtration
Answer: b) Crystallization
Question 25: What is formed when magnesium oxide reacts with water?
- a) Magnesium hydroxide
- b) Magnesium carbonate
- c) Magnesium sulfate
- d) Magnesium chloride
Answer: a) Magnesium hydroxide
Question 26: What is the effect of heating a metal blade?
- a) It changes color
- b) It melts
- c) It evaporates
- d) It turns into ash
Answer: a) It changes color
Question 27: What type of change is souring of milk?
- a) Physical change
- b) Chemical change
- c) Reversible change
- d) None of the above
Answer: b) Chemical change
Question 28: What happens to iron in the presence of moisture and oxygen?
- a) It melts
- b) It rusts
- c) It becomes shiny
- d) It breaks
Answer: b) It rusts
Question 29: Which of the following is a method to prevent rusting?
- a) Keeping iron in the sun
- b) Applying a coat of grease
- c) Washing with water
- d) Heating the iron
Answer: b) Applying a coat of grease
Question 30: What type of change is the explosion of a firework?
- a) Physical change
- b) Chemical change
- c) Reversible change
- d) None of the above
Answer: b) Chemical change
Class 7 Science Physical and Chemical Changes Chapter Summary
The chapter on Physical and Chemical Changes in Class 7 Science explains the differences between physical and chemical changes. Physical changes involve alterations in physical properties without forming new substances, whereas chemical changes involve the formation of new substances with different chemical properties. Examples of physical changes include melting, making ice cream, and cutting paper, while chemical changes include rusting, burning, and digestion. The chapter highlights the characteristics of each type of change and provides examples from daily life, emphasizing the importance of understanding these changes in various contexts.
NCERT Solutions Class 7 Science All Chapters
FAQs on Physical and Chemical Changes Class 7 MCQ
What are the physical and chemical changes Class 7?
Physical changes alter physical properties like shape, size, color, and state without forming new substances (e.g., melting ice, making ice cream, cutting paper). Chemical changes form new substances with different properties (e.g., rusting iron, burning magnesium, digesting food).
What are the 4 clues of a chemical change?
The four clues of a chemical change are the release or absorption of heat, light, or radiation, the production of sounds, new smells, or odors, and changes in color.
What are physical properties and chemical properties Class 7?
Physical properties can be observed without changing the substance's composition (e.g., shape, size, color, state). Chemical properties describe how a substance reacts with others (e.g., reactivity, flammability, corrosiveness).
What are five chemical changes?
Five chemical changes include rusting iron, burning magnesium ribbon, digesting food, baking a cake, and forming manure.
What are 10 examples of physical changes?
Ten physical changes include melting ice, making ice cream, cutting paper, stretching a rubber band, boiling water, evaporating water, crystallizing salt, bending a glass tube, cutting wood, and mixing paint.
