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    • Posted by Praneetha Ravula 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Praneetha Ravula 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Ritik Verma 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Ritik Verma 6 years, 8 months ago

    Molecules stucture and chemical bonding

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    • Posted by Prince Kumar 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Tarun Gomyan 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Tarun Gomyan 6 years, 8 months ago

    Thanks bhaii

    0Thank You

    Yogita Ingle 6 years, 8 months ago

    Quantum numbers: Quantum numbers are numbers that designate and distinguish various atomic orbitals and electrons present in an atom.

    Principal quantum number tells the principal energy level or shell to which the electron belongs. It gives the information about the distance and the energy of the electron.

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    Paniyas Garg 6 years, 8 months ago

    These are the numbers which provide the location of an electron in an atom.

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    • Posted by Alok Gared 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Avnish Tyagi 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Dhama ...? 6 years, 8 months ago

    Homogeneous mixture of two or more component is known as solution. ... [Solute+solvent=solution ]

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    • Posted by Jaishree Bansal 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Harsha Vardhan Lakavarapukota 6 years, 8 months ago

    Left to right period ionic radii decreases due to decrease in size

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    Harsha Vardhan Lakavarapukota 6 years, 8 months ago

    Down the group ionic radii increases due to increase in size

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    • Posted by Jaishree Bansal 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Tarun Gomyan 6 years, 8 months ago

    Atomic radii decrease along to the period because electron add in same shell and down to the group atomic radii increases because one shell is added down to the group

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    Harsha Vardhan Lakavarapukota 6 years, 8 months ago

    Ionic radii is directly proportional to the atomic radii

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    • Posted by Tanya Gupta Gupta 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Mubina Firdaus 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Preeti Rahi 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Preeti Rahi 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Praneetha Ravula 6 years, 8 months ago

    32g

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    Dhama ...? 6 years, 8 months ago

    32

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    • Posted by Krishna Kumar 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Kashish Arora 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Ravi.....✌️ Ivar......? 6 years, 8 months ago

    Equilibrium in Chemical Processes You may have learnt about reversible reactions. As the name suggests, these reactions occur in the forward and reverse direction. In such reactions, when the rate of the forward and reverse reaction is equal, the concentrations of the reactants and products remain constant. At such a stage, the reaction is said to be in chemical equilibrium. However, this equilibrium is said to be dynamic in nature. This is because it consists of a forward reaction where the reactants react to give products and reverse reaction where the products can react to give back the original reactants. Let’s understand these chemical processes below. Dynamic Nature of Chemical Processes in Equilibrium Let’s consider the following reversible reaction – A + B ⇌ C + D As time progresses, the products (C and D) accumulate while the reactants (A and B) deplete. This results in a decrease in the rate of the forward reaction and an increase in the rate of reverse reaction. Ultimately, both reactions occur at the same time reaching a state of equilibrium. This equilibrium can be reached from either direction. Haber’s Process The German chemist, Fritz Haber developed a method to manufacture ammonia from dinitrogen and dihydrogen. This process is the Haber’s process. N2(g) + 3H2(g) ⇌ 2NH3(g) Haber started out with known amounts of dinitrogen and dihydrogen, maintained at high temperature and pressure, and noted the amount of ammonia produced at regular intervals. As the reaction proceeds, after some time, he noted that the composition of the mixture remains the same even though some reactants are still present. This shows that the reaction has reached equilibrium. chemical equilibrium Haber’s process [Source: Wikimedia Commons] Further, Haber’s process demonstrates the dynamic nature of chemical equilibrium in the following manner. Keeping the experimental conditions same as above, hydrogen (H2) was replaced with deuterium (D2). This gives rise to ND3 as the product instead of NH3. Both reactions, one involving H2 and one with D2 were allowed to proceed to equilibrium. When these two mixtures (H2, N2, NH3 and D2, N2, ND3) were mixed and left for a while, it was observed that the concentration of ammonia was the same as before. Although, mass spectrometry revealed that along with ammonia, all forms containing deuterium and dihydrogen were present (NH2D, NHD2, ND3, H2, HD and D2). This shows that the scrambling of H and D atoms must be possible due to the continuation of the forward and reverse reactions. There would have been no mixing of isotopes if the reaction had stopped on reaching equilibrium. Therefore, chemical reactions reach a state of dynamic equilibrium in which the rates of forwarding and reverse reactions are equal and there is no net change in composition. Chemical Equilibrium is Bidirectional Whether we start a reaction using reactants or products, equilibrium is attainable from both sides. Let’s consider the following reaction. H2(g) + I2(g) ⇌ 2HI(g) If we start the reaction with equal initial concentrations of H2 and I2, then the reaction proceeds in the forward direction where the concentration of H2 and I2 decreases and that of HI increases until it reaches equilibrium. If we start the above reaction in the reverse direction, then the concentration of HI decreases while that of H2 and I2 increases till it reaches equilibrium. Therefore, if the total number of atoms of an element are same in a given volume, we get the same equilibrium mixture whether we start it with reactants or with products

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    • Posted by Smriti Chaudhary 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Sarim Sarim 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Ravi.....✌️ Ivar......? 6 years, 8 months ago

    Hello Dhama...

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    Dhama ...? 6 years, 8 months ago

    According to law of conservation of mass ..matter neither be created nor be destroyed byAntoine lavoisier ..

    3Thank You

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    • Posted by Gaurav Jha 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Durga Verma 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 6 answers

    Harsha Vardhan Lakavarapukota 6 years, 8 months ago

    Lilliput view of chemistry is the best reference book for chemistry

    0Thank You

    Preeti Rahi 6 years, 8 months ago

    Aur p.bahadur bhi

    0Thank You

    Preeti Rahi 6 years, 8 months ago

    Sabse achchi pradeep's hai

    0Thank You

    Esha Pal 6 years, 8 months ago

    Modern s abc...

    0Thank You

    Tanu Adhikari 6 years, 8 months ago

    R.C. Mukharjee

    0Thank You

    Ketan Patil 6 years, 8 months ago

    Error less

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    • Posted by Arjun Kalariya 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Harsha Vardhan Lakavarapukota 6 years, 8 months ago

    It is used in the identification of basic radicals in qualitative analysis

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    • Posted by Maninder Singh 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Sandeep Baghel 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sia ? 4 years, 6 months ago

    CF / CP release refers to two different ways of releasing the club. 'CF' and 'CP' are implying centrifugal and centripetal force which are hence thought to be a characteristic element in the release action of the club.

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    • Posted by Piyush Kumar 5 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Deevanshu Saxena 6 years, 8 months ago

    Bcoz it depends on the valency of an element.. It can either be positive or negative...

    3Thank You

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    • Posted by Sagar Pandya 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by ?????????? Do??? 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Ashar Xhaikh 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Kamna Dangre 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 8 months ago

    Kp is used for reactions involving gases, and the equilibrium constant is expressed in terms of the partial pressures of the gases. Whereas, Kc is used as a general constant, and the concentrations (in moles/liter) are used in calculating its value.

    Kc is the ratio of products  concentration over reactants  concentration and Kp is the ratio of products  partial pressures and reactants  partial pressures.

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    • Posted by Ketan Patil 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sankalp Awasthi 6 years, 8 months ago

    Is there any topic???? ...srry bt i don't know..relatively i wanna ask

    1Thank You

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    • Posted by Ujas Vankar 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 8 months ago

    Almost after two millennia, the works on the simplifying matter was materialized by Dalton. In 1808 John Dalton postulated the famous Dalton’s Atomic Theory. He published this theory in a paper titled “A New Chemical Philosophy”; indeed the philosophy was new for that era. The postulates of Dalton’s Atomic Theory were as follows:

    1. Matter is made up of indivisible particles known as atoms.
    2. The properties of all the atoms of a given element are same including mass. This can also be stated as, all the atoms of an element have identical mass; atoms of different elements have different masses.
    3. Atoms of different elements combine in fixed ratios to form compounds.
    4. Atoms are neither created nor destroyed. This implies that during chemical reactions, no atoms are created nor destroyed. The formation of new products (compounds) results from the rearrangement of existing atoms (reactants).

    Dalton’s Atomic Theory also suggested that the smallest part of an atom that can take part in a chemical reaction is an atom. Some postulates of this theory remain valid even in modern chemical thoughts. The atomic structure model proposed by Dalton has proved to be a stepping stone in chemistry and forms the base for modern atomic theories and quantum mechanics.

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    • Posted by Arjun Rathor 6 years, 8 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 8 months ago

    Beryllium and magnesium atoms are smaller in size and their electrons are strongly bound to the nucleus. They need large amounts of energy for excitation of electrons to higher energy levels which is not available in the bunsen flame. So they do not impart colour to the flame.

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