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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NCERT Solutions for Class 9 Social Science Civics Chapter 1 Democracy in the Contemporary World NCERT Solutions for Class 9 Social Science Democratic Politics I Chapter 1 Democracy in the Contemporary World Page 19 1. Which of the following does not lead to the spread of democracy? (a) Struggle by the people (b) Invasion by…
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CBSE Class 9 English Grammar – Sentence Reordering and Sentence Transformation I. SENTENCE REORDERING Look at the words and phrases given below. Rearrange them to form meaningful sentences. (a) respect/said that/demanded/it/but/is/given/that/is not (b) if/something/then/in return for/should be/it is so/it (c) self-respect/come out of/something/has/our/self/that/and/is/that (a) Oliver Twist/workhouse/in/was/born/a (b) knew/father/nobody/who/was/his (c) died/mother/his birth/his/soon/after (a) pillars/there/human life/man/of/woman/and/are/two (b)…
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Omission Exercises for Class 9 CBSE With Answers Omission Solved Exercises With Answers for Class 9 CBSE Question 1. Before Missing Word After Everyone wishes to healthy e.g. to be healthy but not are ready to (a) _________________ _________________ _________________ work in direction. (b) _________________ _________________ _________________ It takes a lot discipline (c) _________________ _________________…
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Editing Exercises for Class 9 CBSE with Answers I. ERROR CORRECTION TYPE – I The following passages have not been edited. There is one error in each line. Write the incorrect word and the correction against the correct question number. Remember to underline the word you have supplied. ANSWERS TYPE-II Edit the…
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