Class 11 | Chapter 6 (Thermodynamics) NCERT Chemistry Solutions

Question 1Choose the correct answer A thermodynamic state junction is a quantity (i) used to determine heat changes (ii) whose value is independent of path (iii) used to determine pressure volume work (iv)…

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Class 11 | Chapter 5 (States of Matter) NCERT Chemistry Solutions

Question 1What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 30°C? According to Ideal Gas Equation PV = constant ThereforeP1V1 = P2V2 ReplacingP1 =…

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Class 11 | Chapter 4 (Chemical Bonding and Molecular Structure) NCERT Chemistry Solutions

Question 1Explain the formation of a chemical bond. The attractive force which holds together the constituent particles (atoms, ions or molecules) in a chemical species is known as chemical bond. Atoms either share…

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Class 11 | Chapter 3 (Classification of Elements and Periodicity in Properties) NCERT Chemistry Solutions

Question 1What is the basic theme of organisation in the periodic table? Similarity in properties is the basic theme for organisation of elements in the periodic table. According to their characteristics, the elements…

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Class 11 | Chapter 2 (Structure of Atom) NCERT Chemistry Solutions

Question 1 (i) Calculate the number of electrons which will together weigh one gram. Mass of an electron = 9.1 × 10-23 g ⇒ 1 g = 1 / 9.1 × 10-23 =…

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Anode Rays

In 1886, Goldstein was able to show the presence of positive rays. While carrying out experiments with discharge tubes containing perforated cathodes, he observed that some new type of luminous rays were passing…

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Oil Drop Experiment by Millikan

Rober Andrews Millikan measured electric charge on an electron in 1909 by his famous Oil Drop Experiment. The apparatus used in this experiment is shown in below. In this experimental setup we have…

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Cathode Rays Experiment

A discharge tube is a cylindrical hard glass tube fitted with two metallic electrodes. The tube has a side-tube with a stopcock. The discharge tube can be evacuated or filled with any gas…

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Solving World Problems Using Chemistry | Class 11

Some of the priority problems facing the human race in which chemists is expected to make significant contributions towards solutions are listed below. The food-population problem In parts of the world where population…

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Mole Concept

The term mole is derived from Latin language word which means a pile or mass of stones places in sea. Likewise word mole in chemistry means a pile of atoms, molecules, ions or…

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