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    • Posted by Anmol Deep Singh Dhillon 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Khushboo Yadav 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Princee Rajput 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Minakshi Kapoor 8 years, 4 months ago

    Molecular mass or molecular weight is the mass of a molecule. It is calculated as the sum of the atomic weights of each constituent element multiplied by the number of atoms of that element in the molecular formula.

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    • Posted by Aashita Sharma 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    Himanshu Singhal 8 years, 4 months ago

    This is due to their small size and higher effective nuclear charge. Due to these two parameters halogens easily gain one electron to complete their octet and attain Noble gas configuration.

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    • Posted by Abhishek Chaturvedi 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Himanshu Singhal 8 years, 4 months ago

    These materials are slightly attracted by a magnetic field and the material does not retain the magnetic properties when the external field is removed. Paramagnetic properties are due to the presence of some unpaired electrons, and from the realignment of the electron paths caused by the external magnetic field.

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    • Posted by Adarsh Singh 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Lucky Yadav 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Kiran Sandhu 8 years, 4 months ago

    Covalent bond defined as" the bond formed by mutual sharing of electrons between the combining atoms of same or different elements ".

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    • Posted by Mohvijay Jain 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Divya Sharma 8 years, 4 months ago

    1 mole is 22 gram electrons and 6.022 *1023 atoms of carbon contains (you should say and asked some question OK I Divya ,)

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    • Posted by Abhi Don 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Kamal Das 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Riya Tyagi 8 years, 4 months ago

    Because Be has configuration 1s^2 2s^2 whereasB has 1s^2 2s^2 2p^1 Be is having fully filled S orbital it is more diddicult to remove qn electron from fully dilled orbitals ans this is also due to penitrating S-orbital

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    • Posted by Badal Varshney 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Uttam Nishad 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Uttam Nishad 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Kiran Sandhu 8 years, 4 months ago

    Example for resonance structure is CO. We expect the double bond in carbon and oxygen atom. However carbon -oxygen bond length has been experimentally determined to be 113 pm. This lies between normal C= O (122pm) and C triple bond O (1.10pm)

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    • Posted by Srinu Srinivas 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Ajaj Khan 7 years ago

    The resistance of 0.01M NaCl solution at 25c is 200oms. The cell constant of the conductivity cell is unity. Calculate the molar conductivity of the solution.?

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    • Posted by Srinu Srinivas 4 years, 6 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sia ? 4 years, 6 months ago

    Classifications of batteries:
    (a) Primary batteries (b) Secondary batteries
    Primary batteries are non-chargeable batteries whereas secondary batteries are rechargeable.

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    • Posted by Richa Mishra 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Divya Sharma 8 years, 4 months ago

    Bod is similar in function to chemical oxygen demand (cod) , in that both measure the amount of organic compounds in water. Cod is less specific,since it measures everything that can be chemically oxidized rather that just levels of biodegradable organic matter

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    • Posted by Manoj Kumar 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Rahul Telangi 8 years, 4 months ago

    Let's say you had 1 L of water. At 25∘C , the density of water is 0.9970749 g/mL , so that's 0.9970749 kg . At that amount of water, the number of moles is 997.0749 g 18.0148 g/mol = 55.348 mols molality: mol water kg water = 55.348 mols 0.9970749 kg = 55.50991407 ≈ 55.510 m molarity: mol water L water = 55.348 mols 1 L ≈ 55.348 M

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    Rahul Telangi 8 years, 4 months ago

    55.55 M

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    • Posted by Rahul Telangi 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Arun Soni 8 years, 4 months ago

    The emission spectrum of atomic  hydrogen (n=3 to n=1) is divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making transitions between two energy levels in the atom.

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    • Posted by Rahul Rajput 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Anukalp Pandey 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Nishant Gupta 8 years, 4 months ago

    One sigma and one py

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    • Posted by Kanti Devi 4 years, 6 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sia ? 4 years, 6 months ago

    <colgroup> <col /> <col /> </colgroup>

    Orbits

    Orbitals 

    Orbit is a well-defined circular path around the nucleus in which electrons revolve around the nucleus.

    3-dimensional space around the nucleus where is probability of finding an electron is maximum is called an orbital. 

    It represents the motion of an electron in one plane. 

    It represents motion of an electron in three-dimensional space.

    All the orbits are either circular or elliptical. 

    Orbitals are of different shapes such as spherical, dumbbell and double dumbbell.  

    In an orbit one, two or more than two electrons can be present. In an orbit number of electrons can be 2n2 where ‘n’ is number of orbit or principle quantum number. 

    In one orbital maximum two electrons can be filled. 

    Orbits are non-directional in nature. 

    Orbitals are directional in nature except s-orbitals which are spherical in shape. 

    Orbits represent that position and momentum of an electron can be measured simultaneously with certainty. Which is against Heinsberg’s principle. 

    Orbitals concept completely complies with Heinsberg’s uncertainty principle. 

    Atomic Structure showing Orbit 

    Shapes of s, p, d and f-orbitals

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    • Posted by Ayush Guglani 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Shruti Jha 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Shruti Jha 8 years, 4 months ago

    No there will infinite significant figures

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    G H 8 years, 4 months ago

    There will be six significant figures

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    • Posted by Kaustubh Narain 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Arun Soni 8 years, 4 months ago

    Matter is made of atoms, and atoms are made protons, neutrons and electrons.

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    • Posted by Mayank Tibrewal 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Arun Soni 8 years, 4 months ago

    The dissociation degree is the fraction of original solute molecules that have  dissociated. It is usually indicated by the symbol α. More accurately, degree of dissociation refers to the amount of solute dissociated into ions or radicals per mole.

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    • Posted by Riya Tyagi 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Nikhil Malik 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
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    • Posted by Nikhil Malik 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Ravindra Kumawat 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Arun Soni 8 years, 4 months ago

    The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons.

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    • Posted by Arnav Singh 8 years, 4 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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