Science

Important Questions of Magnetic Effects of Electric Current Class 10 Science Chapter 13

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Question 1.What is meant by magnetic field?Answer:Magnetic field : It is defined as the space surrounding the magnet in which magnetic force can be experienced. Question 2.Draw magnetic field lines around a bar magnet. Name the device which is used to draw magnetic field lines. (Board Term I, 2015)Answer:Compass needle is used to draw magnetic …

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Important Questions of Acids Bases and Salts Class 10 Science Chapter 2

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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 form salt and water. For example, the reaction between carbon dioxide and calcium hydroxide. Calcium hydroxide, …

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Important Questions of Chemical Reactions and Equations Class 10 Science Chapter 1

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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 = reaction condition; z = number of molecules of oxygen(d) x = physical state of KClO3 and …

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Important Questions of How Do Organisms Reproduce Class 10 Science Chapter 8

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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 some variations each time. As a result, the DNA copies produced are similar to each other …

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Chemical Equations and Reactions, Chapter-1, Class 10, CBSE, NCERT Exemplar

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Multiple Choice Questions 1. Which of the following is not a physical change? (a) Boiling of water to give water vapour (b) Melting of ice to give water (c) Dissolution of salt in water (d) Combustion of Liquefied Petroleum Gas (LPG) Soln: Answer is (d) Combustion of Liquefied Petroleum Gas (LPG) Explanation: Combustion is always …

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