CBSE

Important Questions for Class 10, Maths, Chapter 3, Pair of Linear Equations in Two Variables

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Pair of Linear Equations in Two Variables Class 10 Important Questions Very Short Answer (1 Mark) Question 1.How many solutions does the pair of equations y = 0 and y = -5 have? (2013)Solution:y = 0 and y = -5 are Parallel lines, hence no solution. Question 2.If ax + by = a2 – b2 and bx …

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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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