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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Chemical Reactions and Equations Class 10 Important Questions with Answers Science Chapter 1 Question 1. Identify ‘x’, ‘y’ and ‘z’ in the following reaction : (a) x = gas; y = reaction condition; z = gas (b) x = solid; y = liquid; z = gas (c) x = number of moles of KClO3; y…
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NCERT Exemplar Class 10 Science Chapter 10 Light Reflection and Refraction Short Answer Questions Question 1. Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram. Answer. Due to variation in speed of light in different medium, light bends as it moves…
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