In this post you will find Environmental Chemistry question and answer, including NCERT questions. 1. Define environmental chemistry? Answer: Environmental Chemistry is the branch of science which deals with the chemical changes in the environment. It includes our surroundings such as air, water, soil, forest etc. 2. Explain the tropospheric pollution in 100 words? Answer: Tropospheric pollution […]
Chapter 14 Environmental Chemistry: Q&A Read More »
In this post, you will find the questions and answers of Surface Chemistry which include NCERT exercises. 1. Write any two characteristics of Chemisorption. Answer: The characteristics of Chemisorption are: (a) In Chemisorption which is highly specific in nature the adsorbate and adsorbent get attached by chemical bonds which are either covalent or ionic in nature.
Chapter 5 Surface Chemistry: Q&A Read More »
In this post, questions and answers of class 12 chapter Solutions are provided which included NCERT questions. 1. Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride. Answer: Mass of solution = Mass of C6H6 + Mass of CCl4 = 22 g+122
Chapter 2 Solutions: Q&A Read More »
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
Chapter 1 Solid State: Q&A Read More »
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
Chapter 1 Basic Concepts of Chemistry: Q&A Read More »
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
Can you solve this Organic Chemistry Question? Read More »
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
Structure of Atom: 78 Must-Know Q&A Read More »
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
Atoms and Molecules: 75 Must-Know Q&A Read More »
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
Periodic Classification of Elements: 48 Must-Know Q&A Read More »
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
Periodic Classification of Elements: Short Notes Read More »
