Chirag Gupta

Hello! I am Chirag Gupta, author of CG's Chemistry Solutions. I am a Chemistry Teacher working with some of the reputed Ed-Tech companies having 4+ years of experience in online and offline teaching and doubt solving.

Is Matter Around Us Pure: 52 Ques and Ans

This post contains Question Answer of chapter Is Matter Around Us Pure including NCERT Exercise.  1. What is meant by a substance? Sol: A substance is a kind of matter that cannot be separated into other kinds of matter by any physical process. 2. List the point of difference between homogeneous and heterogeneous mixtures. Sol: […]

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Matter In Our Surroundings: 35 Ques and Ans

This post contains Question Answer of chapter Matter in Our Surroundings including NCERT Exercise. 1. Which of these are matter: Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume? Sol: The following are matter: chair, air, almonds, cold drink, smell of perfume. 2. Give reasons for the following observation: The smell

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Can gas be liquefied by increasing pressure?

In this article, you will find the answer of the question “can gas be liquefied by increasing pressure?” Liquefaction of gases is the process by which substances in their gaseous state are converted to the liquid state. Different physical states of matter differ in the space in between their particles. The gaseous state has very

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Properties of states of matter

There are three states of matter: Solid state Liquid state Gaseous state What are the properties of solids (First states of matter)? Solids possess the following properties: Solids are rigid and incompressible. Because in solids, the constituent particles are closely packed and there is virtually no space between the particles. So, solids cannot be compressed.

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Calculate the number of sulphate ions in 100 ml of 0.001 M H2SO4 solution.

We are given with,   Molarity = 0.001 M   Volume = 100 ml = 0.1 L   Number of moles of H2SO4 =  Molarity*Volume = 0.001 M*0.1 L = 0.0001 mole   Dissociation of sulphuric acid occurs as: H2SO4 ⟶ 2H+ + SO42-   From the above equation, 1 molecule H2SO4 given 1 SO42- ion   then,

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From 200 mg of CO2, 10^21 molecules are removed. How many moles of CO2 are left?

Given mass of CO2 = 200 mg = 0.2 g   Molar mass of CO2 = 44 g/mol   Number of moles of 200 mg CO2 = Given mass/Molar mass of CO2 = 0.2 g/44 g mol-1 = 0.00454 mole   Number of molecules of CO2 removed = 1021   Number of moles of CO2 removed = 1021/(6.022*1023) =

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