Human Eye and Colourful World Class 10 Important Questions with Answers Science Chapter 11 Question 1. State one function of iris in human eye. (AI 2012) Answer: Irish adark muscular diaphragm that controls the size of the pupil. Question 2. State one function of the crystalline lens in the human eye. (Foreign 2012) Answer: The…
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Light Reflection and Refraction Class 10 Important Questions with Answers Science Chapter 10 Question 1. The laws of reflection hold true for (a) plane mirrors only (b) concave mirrors only (c) convex mirrors only (d) all reflecting surface Answer: (d) The laws of reflection holds true for all reflecting surface. Question 2. List four characteristics…
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Heredity and Evolution Class 10 Important Questions with Answers Science Chapter 9 Question 1. All the variations in a species do not have equal chances of survival. Why? (Foreign 2014) Answer: All the variations do not have equal chances of survival in the environment in which they live. Depending on the nature of variations, different…
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How Do Organisms Reproduce Class 10 Important Questions with Answers Science Chapter 8 Question 1. Newly formed DNA copies may not be identical at times. Give one reason. (AI2017) Answer: When a cell reproduces, DNA replication occurs which results in formation of two similar copies of DNA. The process of copying the DNA leads to…
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Control and Coordination Class 10 Important Questions with Answers Science Chapter 7 Question 1. Which is the largest and most prominent part of the brain? (Board Term I, 2013) Answer: Cerebrum is the largest and most prominent part of the brain. Question 2. (a) Name one gustatory receptor and one olfactory receptor in human beings.…
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Life Processes Class 10 Important Questions with Answers Science Chapter 6 Question 1. Most of the digestion and absorption of the food takes place in the (a) small intestine (b) liver (c) stomach (d) large intestine. (2020) Answer: (a) small intestine Question 2. Mention the raw materials required for photosynthesis. (Board Term I, 2016) Answer:…
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Periodic Classification of Elements Class 10 Important Questions with Answers Science Chapter 5 Question 1. State Mendeleev s Periodic law. Answer: Medeleev’s periodic law states that the properties of elements are periodic function of their atomic masses. Question 2. Why did Mendeleev leave some gaps in the Periodic table? Answer: Mendeleev left some gaps in…
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Carbon and its Compounds Class 10 Important Questions with Answers Science Chapter 4 Question 1. Covalent compounds have low melting and boiling point. Why? (2020) Answer: Covalent compounds have low melting and boiling points because the forces of attraction between molecules of covalent compounds are very weak. On applying a small amount of heat these…
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Metals and Non-Metals Class 10 Important Questions with Answers Science Chapter 3 Question 1. Reverse of the following chemical reaction is not possible: Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) Justify this statement with reason. (Board Term I, 2016) Answer: If a strip of zinc metal is put in copper sulphate solution, then the blue…
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Acids Bases and Salts Class 10 Important Questions with Answers Science Chapter 2 Question 1. With the help of an example explain what happens when a base reacts with a non- metallic oxide. What do you infer about the nature of non-metal oxide? (Board Term I, 2017) Answer: Oxides of non-metals react with bases to…
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