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    • Posted by Ranger King 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Ranger King 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
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    • Posted by Aditya Kumar 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sumit Singh 3 years, 11 months ago

    The field equations and energy-momentum tensor are derived for a charged ideal fluid coupled to a scalar field. It is shown that there exists an interaction energy-momentum tensor which can have negative energy densities even though the fluid and fields have positive energy densities. The energy density and mass of a fluid sphere are calculated in the weak field limit and it is shown that they can be negative if certain conditions are met. When the mass of the sphere is negative the entire interior consists of exotic matter (i.e., matter which violates the weak energy condition).

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    • Posted by Tanisha Chawla 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by ?Ritesh Gupta☺️ 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 3 years, 11 months ago

    A molecule is defined as the smallest unit of a compound that contains the chemical properties of the compound. Molecules are made up of groups of atoms. Describing the structure of an atom, an atom is also sub-divided into smaller units. Protons, electrons, and neutrons are sub-particles of an atom. The protons and neutrons are contained inside the nucleus of the atom and electrons revolve around the nucleus.

    Protons are positively charged particles whereas electrons are negatively charged particles. Neutrons do not carry any charge. So we can say that the nucleus is positively charged due to the presence of protons. The nucleus is a bulk mass at the centre of an atom. Atoms are largely vacant.

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    • Posted by Tanisha Chawla 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Rajvi Bujad 3 years, 11 months ago

    Because this is how we arranges them. 4s²3d¹is also right but to make easy we generally prefer 3d¹4s²

    1Thank You

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    • Posted by Ranger King 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sachi Chauhan 3 years, 11 months ago

    Magnetic quantum no=2l+1 where l=no of subshells.

    1Thank You

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    • Posted by Pratyusha Mishra 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Pratyusha Mishra 3 years, 11 months ago

    Thanks dude ☺

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    Yogita Ingle 3 years, 11 months ago

    The third law of thermodynamics states that the entropy of a perfect crystal at a temperature of zero Kelvin (absolute zero) is equal to zero.

    Entropy, denoted by ‘S’, is a measure of the disorder/randomness in a closed system. It is directly related to the number of microstates (a fixed microscopic state that can be occupied by a system) accessible by the system, i.e. the greater the number of microstates the closed system can occupy, the greater its entropy. The microstate in which the energy of the system is at its minimum is called the ground state of the system.

    At a temperature of zero Kelvin, the following phenomena can be observed in a closed system:

    • The system does not contain any heat.
    • All the atoms and molecules in the system are at their lowest energy points.

    Therefore, a system at absolute zero has only one accessible microstate – it’s ground state. As per the third law of thermodynamics, the entropy of such a system is exactly zero.

    1Thank You

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    • Posted by Hitesh Jindal 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Tenzin Tenzin 3 years, 11 months ago

    Since acids and bases react with each other, this implies that water can react with itself! While that might sound strange, it does happen water molecules exchange protons with one another to a very small extent. We call this process the autoionization, or self-ionization, of water.

    1Thank You

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    • Posted by Dark ..? 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 4 answers

    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Mujhe friend request bhejo Facebook me...Facebook id - Ritesh Raj(ritt)

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    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Nice to meet you sona

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    Ranger King 3 years, 11 months ago

    The state at which rate of forward reaction becomes equal to the rate of backward reaction is called equilibrium

    1Thank You

    Hitesh Jindal 3 years, 11 months ago

    Equilibrium representa a state of process in which the properties like temperature, Pressure, concentration of the system do not show any change with the passage of time.

    2Thank You

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    • Posted by Radha Yadav 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ranger King 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Yogita Ingle 3 years, 11 months ago

    Isoelectronic species: These are those species which have the same number of electrons.They are the ions of different elements which have same number of electrons but differ from one another in magnitude of nuclear charge.

    Examples of isoelectronic species with 10 electrons:N3-,O2-,F-

    0Thank You

    Ranger King 3 years, 11 months ago

    Species having same no. Of electron are called isoelectronic eg. Na3- ,O2-,Mg2+

    1Thank You

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    • Posted by Ranger King 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 3 years, 11 months ago

    Diamagnetic means the atoms or molecules  has no unpaired electrons or spins.  Hence, that substance does not get attracted to magnetic field when placed in it.

    For example, Cl-, N2

    Paramagnetic means the atoms or molecules  has one or more unpaired electrons or spins.  Hence, that substance gets attracted to magnetic field when placed in it.

    For example, O2

    1Thank You

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    • Posted by Aditya Kumar 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 3 years, 11 months ago

    The goal of alchemy was to find a mythical and magical substance called “philosopher’s stone” not a literal stone but wax, liquid or powder with magical power, which on heating with a base, iron and copper metals would turn into gold, the purest form of matter which would bring wealth, health and immortality.

    1Thank You

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    • Posted by Priyanshu Kumar 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Ranger King 3 years, 11 months ago

    The group of lines produced when the electron jumps from 3rd, 4th ,5th  or any higher energy level to 2nd energy level are called Balmer series.

    1Thank You

    Gaurav Seth 3 years, 11 months ago

    (1) When the electron jumps from energy level higher than n=1 ie. n=2,3,4,5,6 ….to n=1 energy level, the group of lines produced is called lyman series. These lines lie in the ultraviolet region.

    (2) The group of lines produced when the electron jumps from 3rd, 4th ,5th  or any higher energy level to 2nd energy level, is called Balmer series. These lines lie in the visible region.

    1Thank You

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    • Posted by Royal Thakur ? 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 4 answers

    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Acha

    0Thank You

    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Apna Facebook id batana

    0Thank You

    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Kaise ho bro

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    Yogita Ingle 3 years, 11 months ago

    In this triple bond is present between carbon atoms (C  C  bond).The hybridisation is sp and the general formula involved is CnH2n -2.

    •  The lowest member of alkynes is: simplest compound that is CH  CH (ethyne).
    • The common name of it is acetylene.
    • It has high Bond dissociation energy, as there is triple bond present therefore the energy is high of the order 823 KJ/mol.
    • Due to this reason the acetylene is mixed with O2 and the flame is used for welding purpose.

    2Thank You

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    • Posted by Royal Thakur ? 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 3 years, 11 months ago

    The structure of the alcohol functional group is R−OH. Aldehyde is the functional group in which one alkyl group is bonded to the carbonyl atom. The structure of the aldehyde functional group is –CHO.

    1Thank You

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    • Posted by Jageshwar Prasad Sahu 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Yogita Ingle 3 years, 11 months ago

    (i) If Kc > 103, products predominates over reactants i.e; if Kc is very large, the reaction proceeds nearly to completion. 
    (ii) If Kc < 10-3, reactants predominates over products i.e; if Kc is very small, the reaction proceeds rarely. 
    (iii) If Kc is in the range of 10-3 to 103, appreciable concentration of both reactants and products are present. 

    0Thank You

    Gaurav Seth 3 years, 11 months ago

    (i) If Kc > 103, products predominates over reactants i.e; if Kc is very large, the reaction proceeds nearly to completion. 

    (ii) If Kc < 10-3, reactants predominates over products i.e; if Kc is very small, the reaction proceeds rarely. 

    (iii) If Kc is in the range of 10-3 to 103, appreciable concentration of both reactants and products are present.

    0Thank You

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    • Posted by ?Ritesh Gupta☺️ 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Ranger King 3 years, 11 months ago

    Alkanes are contain carbon - carbon single bond in compounds. It is saturated .eg. methane(methane (CH4), ethane (C4H6) etc.

    1Thank You

    Gaurav Seth 3 years, 11 months ago

    Alkanes

    Alkanes are saturated, open chain hydrocarbons containing carbon-carbon single bonds. e.g., methane (CH4), ethane (C4H6) propane (C3H8), etc.

    These hydrocarbons are inert under normal conditions [i.e.,do not react with acids. bases and other reagents). Hence, they were earlier known 88 paraffins (Latin : parum-little; affins-affinity)

    Alkanes exhibit chain isomensm, position isomerism and conformational isomerism.

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    • Posted by Aadya Singh 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Ranger King 3 years, 11 months ago

    Effusion is also the ability of a gas to escape or travel through a small hole with a small aperture and from a place of high concentration to low concentration.

    2Thank You

    Aadya Singh 3 years, 11 months ago

    OKAY?..AND ALL THE BEST?? .... GUD NYTT?

    2Thank You

    Aadya Singh 3 years, 11 months ago

    Effusion**

    2Thank You

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    • Posted by Aadya Singh 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Priyanshu Kumar 3 years, 11 months ago

    It is a type of phenomenon in which gases move from higher concentration to the area of lower concentration.

    1Thank You

    Yogita Ingle 3 years, 11 months ago

    Diffusion is a phenomenon where there is a movement of one material move from area of high concentration to the area of low concentration. This means particles or molecules spread through medium. For example, if you spray at the one end of the room you would be able to smell at the other end. This is because of diffusion phenomenon.

    2Thank You

    Ranger King 3 years, 11 months ago

    Diffusion is defined as the ability of gases to mix with each other without requiring bulk motion.

    2Thank You

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    • Posted by सत्य सनातन? 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Ranger King 3 years, 11 months ago

    Molecular of methane=CH4 Atomic mass of carbon(C) =12g/mole Atomic mass of hydrogen (H)= 1g/mole Molecular mass of CH4=( 12 +4×1) g/mole =16 g/mole No. Of molecule =(16/16) ×6.023×10square23 Ans÷ 6.023 ×10 square 23

    1Thank You

    Gaurav Seth 3 years, 11 months ago

    molecular formula of methane = CH4
    we know,
    atomic mass of C = 12 g/mol
    atomic mass of H = 1 g/mol
    so,
    molecular mass of CH4 =( 12 + 4 × 1 ) g/mol = 16 g/mol

    also we know,
    no of molecule = {given weight /molecular weight } × 6.023 × 10²³

    here,
    given weight = 16 g
    molecular weight = 16 g/mol

    so,
    no of molecules = ( 16/16) × 6.023 × 10²³
    = 6.023 × 10²³

    0Thank You

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    • Posted by Aadya Singh 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Ranger King 3 years, 11 months ago

    The Combining of two atoms are called covalent bonds

    2Thank You

    ?Ritesh Gupta☺️ 3 years, 11 months ago

    Nice to meet you both

    1Thank You

    Aadya Singh 3 years, 11 months ago

    ???bbye... baad me aati hu?

    2Thank You

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    • Posted by Aadya Singh 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Aadya Singh 3 years, 11 months ago

    Hn shayad ?jyada padh rhe h sbb?

    3Thank You

    Aadya Singh 3 years, 11 months ago

    Ruko msg krti hu???

    2Thank You

    Aadya Singh 3 years, 11 months ago

    Baat nhi hue h bhot time se ?Diwali pe hi hue thi?.. Us time achhi thi ?

    2Thank You

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    • Posted by Royal Thakur ? 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    First Name 3 years, 11 months ago

    Time is nothing but the movements of anything . That movement means here physically as well as chemical reactions, organic or inorganic, which cannot be reversed to that instant again

    1Thank You

    Tec Om 3 years, 11 months ago

    time is a relative quantity

    1Thank You

    ?​?​?​?​?​?​ ?? 3 years, 11 months ago

    ??

    1Thank You

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    • Posted by Ayush Kashyap 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Gaurav Seth 3 years, 11 months ago

    Enthalpy is the measurement of energy in a thermodynamic system. The quantity of enthalpy equals to the total content of heat of a system, equivalent to the system’s internal energy plus the product of volume and pressure.

    1Thank You

    Ranger King 3 years, 11 months ago

    Enthalpy means energy

    1Thank You

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    • Posted by Aakriti Rustagi 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Silêñť Kñighť 3 years, 11 months ago

    [Redox] means (Red)reduction and (Ox)oxidation.redox reaction is a chemical reaction in which both reduction as well as oxidation process occur.these reactions are always energy change in the form of heat,electricity & light.there are two types of redox reaction direct and indirect reaction.

    1Thank You

    Shameem Shaikh 3 years, 11 months ago

    Redox reaction

    0Thank You

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    • Posted by Siddharth .(.$Id) 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 5 answers

    Gaur Saab?? 3 years, 11 months ago

    Paramagnetic

    1Thank You

    First Name 3 years, 11 months ago

    Unlair electrons means 1 spin and it looks for another spin and interact with magnetic fields

    1Thank You

    First Name 3 years, 11 months ago

    Paramagnetic

    1Thank You

    Yogita Ingle 3 years, 11 months ago

    We can explain the paramagnetic nature of oxygen molecule by molecular orbital theory.

    When you draw molecular orbital diagram of O2​

    we can see there are two unpaired electrons are present in the last molecular orbital which shows us that it is paramagnetic in nature.

    2Thank You

    Harsh Hooda 3 years, 11 months ago

    Paramagnetic

    4Thank You

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    • Posted by Sandeep Kaur 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sakshi Chouhan 3 years, 11 months ago

    to convert acetic acid to ethane Lets convert this acetic acid to ammonium acetate then from that we can convert it to Acetamide and form that it can be converted to acetonitrile.Now from acetonitrile it can easily converted to any X-CH3 where X is a halogen and from that X-CH3 it can be converted to ethane by wurtz reaction beacuase ethane has even number of carbon atom. 1.CH3COOH→CH3COONH4 2. CH3CONH4→CH3CONH2 3. CH3CONH2→CH3CN 4. CH3CN+KBr→CH3Br 5. CH3Br+2Na+BrCH3→CH3-CH3+2NaBr Here in Reaction 1) NH3 is added with heat. 2)P2O5 is added with heat. 3)P2O5 is added with heat 4)its an nucleophilic substitution reaction. 5)its called wurtz reaction.

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    • Posted by Krishna Agrawal 3 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 3 years, 11 months ago

    Among  molecule the energy required to break the first N-H bond and other N-H bond is not same" is true.

    The reason for this is -

    • Dissociation energy for the bond of  that is of N-H and  species gets decreased in its value.
    • This means that the breaking of first N-H bond of ammonia molecule during dissociation requires more energy or the highest energy among all the further dissociation.

    0Thank You

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