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    • Posted by Sivan Karthick 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Ayushi Ayushi 7 years, 1 month ago

    Normality indicates the concentration of the solution. Normality definition is the weight of solute dissolved in a liter of solution. Normality of a solution can be calculated when atomic mass and volume are known. If the composition of solute and solvent are same, the solution is saturated. Normality formula is given by, Normality Formula Multiplying molarity can consider favorable normality calculation by the number of equivalents. Normality (N) = Molarity (M) x number of equivalents Example 1 Determine the normality of 0.1381 mol of NaOH, which is dissolved in 300 mL. Solution- Equivalent solute = 0.1381mol x 1 eq/mol Solution = 300mL = 0.300L Normality = 0.1381 x 1 eq/mol 0.300 L Therefore Normality = 0.460 N Example 2- Determine the normality of 0.248mol of H2SO4, which is dissolved in 250mL of solution. Solution Equivalent solute = 0.248mol x 2eq/mol Solution = 250 mL = 0.250L Normality = 0.248mol x 2 eq /mol 0.250L Therefore Normality = 1.984 N

    1Thank You

    Raghav Patidar 7 years, 1 month ago

    Normility : the no. of mole equivalent per litre volume N = n- factor ×M(molarity)

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    • Posted by Sivan Karthick 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Naina Rajput 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Maitri Patel?☺?? 7 years ago

    See the physicswallah videos. They taught too good

    1Thank You

    Ankit Singh 7 years, 1 month ago

    The shortest way is as follows find the valence electrons of central atom lets say A then add number of atoms of hydrogen or halogens bonded to it say B and add or subtract if there is any charge on the molecule(if positive charge is present then subtract and if negative charge is present then add it).... Add A,B and charge accordingly and divide this sum by 2 then u will get a number say X... If X is 2 then hybridisation will be sp X=3 then sp2 X=4 then sp3 X=5 then sp3d X=6 then sp3d2 or d2sp3 X=7 then sp3d3... This is the shortest way of determining the hybridisation .hope This answer is helpful to u

    4Thank You

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    • Posted by Mohammad Shahrukh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    The pressure exerted by the vapours of any liquid is called its vapour pressure.
    Suppose a beaker is partially filled with any liquid. Then the molecules of that liquid at its surface will start evaporating on their own even without heating. This happens because the molecules at surface behave differently than those in the bulk. Now these molecules get converted into vapours which exert some pressure on the walls of the beaker, which is the vapour pressure of that liquid.
    Vapour pressure of any liquid depends upon the following factors:
    (i)  Temperature: As the temperature of the liquid is raised, more molecules get evaporated and thus exert more pressure. So vapour pressure will increase.
    (ii) Intermolecular forces: If the intermolecular attractions between the molecules of liquid are stronger, then its vapour pressure would be low as it would be difficult to convert that liquid into vapours.
    (iii) Addition of solute: Addition of solute raises the boiling point of any liquid, i.e. its will boil at a higher temperature. Thus it will lower the vapour pressure of that liquid.

    3Thank You

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    • Posted by Durgesh Jeengar 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Uday Shankar 7 years, 1 month ago

    The 4d is denoted that the element in 4th shell and d-subshell and 6 denotes that d-subshell contains 6 electrons

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    • Posted by Suraj Singh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    Isotopic effect or isotope effect is the difference in properties of same element due to different atomic masses.  For ex: the three isotopes of hydrogen protium, deuterium and tritium have same atomic (no. 1) but they have different no. of neutrons which change their masses and so their chemical properties remain same but the other properties like rate of equilibrium constants differ in the three.

    3Thank You

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    • Posted by Udit Singh Chauhan 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rishabh Singh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Aman Tiwari 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Sakshi?? Dubey 7 years, 1 month ago

    Every eighth element shows similar propertie to the 1st element

    1Thank You

    Hritik Gupta 7 years, 1 month ago

    it states that every atom wants to have eight valence electrons in its outermost electron shell.

    0Thank You

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    • Posted by Rishabh Singh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ankit Singh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 4 answers

    Ankit Singh 7 years, 1 month ago

    Thanks

    3Thank You

    Nancy Rajput 7 years, 1 month ago

    according to him acid is a substance that is a capable of donating a hydrogen ion H+ and it is known as proton donors . and base are substances capable of accepting hydrogen ion,H+ and it is known as proton acceptors

    2Thank You

    [email protected] M 7 years, 1 month ago

    Accirding to Brønsted–Lowry theory acids are defined as substances that dissociate in aqueous solution to give H+ (hydrogen ions), bases are defined as substances that dissociate in aqueous solution to give OH− (hydroxide ions).

    2Thank You

    Veer Singh 7 years, 1 month ago

    Acids are protons h + Deonar while bases bases are accepter

    2Thank You

    ANSWER

    • Posted by Rishabh Singh 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Prince Neeraj 7 years, 1 month ago

    Ye konse chpt Ka que hai?

    1Thank You

    Ankit Singh 7 years, 1 month ago

    A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power.

    1Thank You

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    • Posted by Ayushi Ayushi 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 6 answers

    Ankit Singh 7 years, 1 month ago

    Yours welcome

    0Thank You

    Ayushi Ayushi 7 years, 1 month ago

    Thanks

    0Thank You

    Ankit Singh 7 years, 1 month ago

    Acid

    0Thank You

    Ankit Singh 7 years, 1 month ago

    Propanoic acif

    0Thank You

    Prince Neeraj 7 years, 1 month ago

    Propanoic acid

    2Thank You

    Avi Dixit 7 years, 1 month ago

    Propanoic acid , carboxylic anion

    2Thank You

    ANSWER

    • Posted by Anand Mahto 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 7 answers

    Ankit Singh 7 years, 1 month ago

    No

    0Thank You

    Sakshi?? Dubey 7 years, 1 month ago

    No

    0Thank You

    Priya Dharshini ☺☺ 7 years, 1 month ago

    No this not possible.

    0Thank You

    Prince Neeraj 7 years, 1 month ago

    So... Do you want to say that you can change a dog into cat by replacing it's tail.

    1Thank You

    Avi Dixit 7 years, 1 month ago

    How ll u change the internal energy nd the behavior of protons nd neutrons

    1Thank You

    Ayushi Ayushi 7 years, 1 month ago

    No

    1Thank You

    Avi Dixit 7 years, 1 month ago

    No not at all

    3Thank You

    ANSWER

    • Posted by Prashant Tiwari 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Manpreet Sandhu 7 years, 1 month ago

    760mm

    1Thank You

    ANSWER

    • Posted by Ayushi Ayushi 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rukhsana Mannan 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sanidhya Jadaun? 7 years, 1 month ago

    Sorry there is no trick. I know that its tough to learn in one go but if u try to learn one topic a day like flame test, acid radical test, basic radical test etc u will be satisfied with your result . I too find it difficult but today i had made it.Good luck for your practical??

    0Thank You

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    • Posted by Vinay Kumar 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ishita Ishita 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 6 answers

    Ankit Singh 7 years, 1 month ago

    ????

    0Thank You

    Ankit Singh 7 years, 1 month ago

    Your welcome ishita

    0Thank You

    Ishita Ishita 7 years, 1 month ago

    Thnk u Ankit.....

    1Thank You

    Ankit Singh 7 years, 1 month ago

    It is defined as the process of separation of the individual components of a mixture based on their relative affinities towards stationary and mobile phases. Principle: The samples are subjected to flow by mobile liquid onto or through the stable stationary phase.

    2Thank You

    Ishita Ishita 7 years, 1 month ago

    Thnks yogita

    1Thank You

    Yogita Ingle 7 years, 1 month ago

    Chromatography:  (Tswett 1906) is a general term which involves processes by which is a mixture of different substances can be:(a) separated,  (b) purified and (c) identified. Originally this technique was employed to separate coloured components from their mixture in the form of distinct zones as rings called Chromatograms. Now it is used for the separation and purification of coloured as well as colourless substances.
    Principle: The technique of chromatography is based on the fact that different constituents of a mixture are adsorbed to different extents by given adsorbent. The medium which carries the mixture of example solvent (such as ether, benzene, alcohol etc.) is called a moving phase and the medium in which various components are adsorbed (such as alumina, silica gel etc.) is called the stationary phase.
    The important types of chromatography are:
    (i) Column chromatography
    (ii) TLC or thin layer chromatography
    (iii) Gas chromatography
    (iv) Paper chromatography.

    1Thank You

    ANSWER

    • Posted by Chanchal Mudgal 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    [email protected] M 7 years, 1 month ago

    Borax is Na2B4O7. Let the oxidation state of boron be x. So, we know that the oxidation state of Sodium and Oxygen are respectively +1 and -2. So, {2×(+1)+4×(x) +7×(-2)} =0 =>2+4x-14=0 =>4x-12=0 =>4x=12 =>x=12/4 =>x=3 So, the oxidation state of boron in a molecule of borax is +3.

    2Thank You

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    • Posted by Riya Raj 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Md Danish 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Priya Dharshini ☺☺ 7 years, 1 month ago

    Co+2h2=ch3oh. Catalyst will only increase the speed of reaction

    2Thank You

    ANSWER

    • Posted by Sanket Mane 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Sivan Karthick 7 years, 1 month ago

    lamda=h÷p where h=plank constant ,p=linear momentum and lamda=wavelenth

    1Thank You

    Yogita Ingle 7 years, 1 month ago

    According to de Broglie electron is considered as wave and thus circular orbit where electron revolving should contain wavelength as a whole number.
    So the circumference (C) of this circle in terms of radius can be written as,
    C = 2πr
    And whole number of wavelengths (nλ) should be equal to this circumference
    Thus,  2πr = nλ

    1Thank You

    ANSWER

    • Posted by Hemant Ritesh Sourashtriya 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sivan Karthick 7 years, 1 month ago

    Be have two electrons in valence shell it forms Leonard shape molecules since bonds are in opposite in direction so the net dipole moment zero but in Be--H due to high electronegativity of Be Berilium attracts an electron of hydrogen so Be gets partial negative charge and H gets partial positive charge hence Be--H is a polar molecule

    3Thank You

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    • Posted by Suman Kumar 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Hritik Gupta 7 years, 1 month ago

    formulated by Kazimierz Fajans in 1923, are used to predict whether a chemical bond will be covalent or ionic, and depend on the charge on the cation and the relative sizes of the cation and anion.

    1Thank You

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    • Posted by @@Ditya ®°@Thore????? 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Amayra Singh 7 years, 1 month ago

    Gas has no definite shape because the forces of attraction between gas molecules are too weak for them to maintain any kind of shape. The inner atomic forces are too weak to prevent spreading of gas molecules.

    1Thank You

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    • Posted by Tushar Kumar 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Amayra Singh 7 years, 1 month ago

    Because due to presence of unpaired pie*2p orbital in O2 molecular orbital.

    4Thank You

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    • Posted by Tushar Kumar 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Amayra Singh 7 years, 1 month ago

    When plaster of Paris CaSO4.1/2 H2O is heated above 393 K, its water of crystallisation is lost and anhydrous Calcium sulphate is left that is known as a dead burnt plaster.

    2Thank You

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    • Posted by Deep Bhandari 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Nancy Rajput 7 years, 1 month ago

    Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only. By the late 19th century, scientists had begun accepting the atomic theory of matter started relating it to individual molecules. The Kinetic Molecular Theory of Gases comes from observations that scientists made about gases to explain their macroscopic properties.

    1Thank You

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    • Posted by Sivan Karthick 7 years, 1 month ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Vikas Verma 7 years, 1 month ago

    Heat can be transform from one form another form

    0Thank You

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