In this post, you will get the Solid State NCERT solutions in addition to other question answer as well. 1. Why are solids rigid? Answer: The constituent particles in solids have fixed positions and can oscillate about their mean positions. Hence, they are rigid. 2. Why do solids have definite volume? Answer: Solids keep their volume because […]
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In this post, you will get the Some basic concepts of chemistry NCERT solutions in addition to other question answer as well. 1. Calculate the molecular mass of the following: (i) H2O (ii) CO2 (iii) CH4 Answer: (i) H2O:The molecular mass of water = (2 x Atomic mass of hydrogen) + (1 x Atomic mass
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This is the organic chemistry question, which is based on word problem which usually comes for 5 marks in 12th board exam. This organic chemistry question was asked in Class 12 CBSE Board All India 2013. Organic Chemistry Question Asked in Exam An organic compound (A) which has characteristic odour, on treatment with NaOH forms
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In this post, question answer of structure of atom are provided which includes NCERT questions as well. 1. What are canal rays? Answer: Canal rays are positively charged radiations which led to the discovery of positively charged sub-atomic particle called proton. 2. If an atom contains one electron and one proton, will it carry any charge
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In this post, questions and answers of atoms and molecules are provided which includes NCERT questions as well. 1. In a reaction 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Show that these observations
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In this post, periodic classification of elements question answers are provided which includes NCERT questions as well. 1. Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out. Answer: Yes, Dobereiner’s triads also existed in the columns of Newland’s Octaves. For example, Li, Na, K.If we consider lithium (Li) as
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In this post, you will get notes of periodic classification of elements chapter. Dobereiner’s Triads Dobereiner’s found that when elements are arranged into groups of three in the order of their increasing atomic mass, the atomic mass of the element; which comes in the middle, is the arithmetic mean of rest of the two. He
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Carbon and its Compounds questions and answers are provided in this post including NCERT questions. 1. What would be the electron dot structure of carbon dioxide which has the formula CO2? Answer: The electron dot structure of carbon dioxide molecule is as: 2. What would be electron dot structure of sulphur which is made up
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In this post, you will study, how to master log and antilog values of a given number. Explanation is provided using examples. Logarithms and Antilogarithms In higher classes, many times we encounter such numbers which are either too big or too small. So, to make the calculations easy and time saving, we use logarithms form
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Here you will find the short notes of carbon and its compound. Carbon is an important constituent of the foods, fuels, household and commercial articles, textile fabrics, perfumes, explosives, dyes, war gases etc. The Earth’s crust has only 0.02% carbon in the form of minerals (like petroleum, coal, carbonates and hydrogen carbonates) and the atmosphere
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