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    • Posted by Muskan Sekho 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Avantika Tayal 6 years, 10 months ago

    For period :no.of valenced shell for all elements. Group For s block element :valences electron. For p block:12+valenced electron. For d clock:valenced e– of s +valenced e– of d. For f:just write f block elwment. For eg: predict grp and period of an elwmwnt having atomaic no.17 Electrknic conf.is 1s2 2s2 2p6 3s1 Grp is 3 Period is 1

    4Thank You

    ANSWER

    • Posted by Muskan Sekho 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 10 months ago

    Buffers are solutions that resist change in pH on dilution or on the addition of small amounts of acids or alkali. 

    A lot of biological and chemical reactions need a constant pH for the reaction to proceed. Buffers are extremely useful in these systems to maintain the pH at a constant value. This does not mean that the pH of buffers does not change. It only means that the change in pH is not as much as it would be with a solution that is not a buffer.

    3Thank You

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    • Posted by Muskan Sekho 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Prakhar J 6 years, 10 months ago

    Na+ is smaller than Na because Na+ is formed when an electron is lost from the Na atom,Thus the effective nuclear charge increases bcz the number of protons exceeds the number of electrons .This results in bringing the valence shell a little closer to the nucleus because of a very strong nuclear pull.

    2Thank You

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    • Posted by Muskan Sekho 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 10 months ago

    Endothermic Reaction

    Exothermic Reaction

    A reaction that the system absorbs energy from its surrounding in the form of heat.

    A reaction that releases energy from the system in the form of heat.

    The energy is absorbed from the surround into the reaction

    The energy is released from the system to its environment.

    Energy in the form of heat

    Energy is released as heat, electricity, light or sound.

    Melting ice, evaporation, cooking, gas molecules, photosynthesis are few examples

    Rusting iron, settling, chemical bonds, explosions, nuclear fission are few examples.

    4Thank You

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    • Posted by Muskan Sekho 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Prashant Bharti 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Mehak Kataria 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Apoorva Jain 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Avantika Tayal 6 years, 10 months ago

    It states that if an alkene is reacts with any compound like HBr then H will go to that c atom which is already rich in h atoms...

    2Thank You

    Prakhar J 6 years, 10 months ago

    The negative part of the adding molecule gets attached to that carbon atom which posses lesser number of hydrogen atoms during addition of unsymmetrical alkene

    2Thank You

    ANSWER

    • Posted by Im Rohit 45 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Anzal Khan 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rahul Singh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Rajesh Jain 6 years, 10 months ago

    It is a kind of solution which helps in maintaining the ph of that substance if some acids or bases is added in that substance Ex-blood is the best example of buffer solution

    2Thank You

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    • Posted by Akash Kumar 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Aaditya Rathore??? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Shatayu Ganvir 6 years, 10 months ago

    Ionic hydrides and covalent hydrides respectively.

    2Thank You

    ANSWER

    • Posted by Ankit Singh ?????? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Anjali Dubey 6 years, 10 months ago

    Relation between kp and kc Law of mass action Le chatliers principle Solubility numericals Buffer solution Common ion effect and it's application

    2Thank You

    ANSWER

    • Posted by Sherry Bansal 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Priya Dharshini ? 6 years, 10 months ago

    Yes it is there

    1Thank You

    ANSWER

    • Posted by Chandransh Arora 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Aaditya Rathore??? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Sanidhya Jadaun? 6 years, 10 months ago

    Similarity to Halogens: hydrogen can also form both ionic and covalent bond. Both H and Halogens form compound with metals and non-metals.

    2Thank You

    Sanidhya Jadaun? 6 years, 10 months ago

    Similarity to alkali metals:hydrogen has 1 electron in its outermost shell and can form compounds with non-metals (such as HCl, etc.).

    3Thank You

    ANSWER

    • Posted by Chandransh Arora 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Isha Kumari 6 years, 10 months ago

    Diborane is called inorganic benzene....

    0Thank You

    Devesh Thakur 6 years, 10 months ago

    B3N3H6

    2Thank You

    Devesh Thakur 6 years, 10 months ago

    Borazine is called inorganic benzene because its similar to benzene

    3Thank You

    ANSWER

    • Posted by Chandransh Arora 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sanidhya Jadaun? 6 years, 10 months ago

    Carbon monoxide act as a poison for human bcoz of its ability to form complex with haemoglobin,which is about 300 times more stable than the oxygen-haemoglobin complex.This prevents haemoglobin in the red blood corpuscles from carrying oxygen round the body and ultimately resulting in death.

    2Thank You

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    • Posted by Joel Mathew 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Prakhar J 6 years, 10 months ago

    And when both alkyl group and halide group is combined we call it as methylchloride.....etc....

    2Thank You

    Prakhar J 6 years, 10 months ago

    Halides that is halogens or group 17....... I.e flourine, chlorine, bromine and iodine........ And when these got converted into anions we got Cl-,Br-, I- and there names are chloride bromide and iodide....?

    2Thank You

    Prakhar J 6 years, 10 months ago

    If we remove one hydrogen from alkane series we got alkyl group for ex. CH4 is an alkane, if we remove one hydrogen we get CH3 and as we call that alkane as methane we will call this alkyl as methyl.....??

    2Thank You

    ANSWER

    • Posted by Shivangi Bhardwaj 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 4 answers

    Priya Dharshini ? 6 years, 10 months ago

    In unacademy app for jee they teach good. Each and every chapter.. youtube channels exam fear is good but disadvantage is each and every concepts video is more than 15 min. Than there are so many parts in it. Best is to study from text book and important concepts which u did nt uderstant can be watched in youtube

    1Thank You

    Shivangi Bhardwaj 6 years, 10 months ago

    He doesn't teach organic and the faculty available on his channel is not appropriate for studying according to me.... Bipin

    0Thank You

    Bipin Kumar Singh 6 years, 10 months ago

    Alakh pandey

    1Thank You

    Shivangi Bhardwaj 6 years, 10 months ago

    Another one plzz

    0Thank You

    ANSWER

    • Posted by Đęépaķ Deep 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    Density increases as we go down the group and hardness decreases. Lithium is the lightest alkali metal and is harder than other alkali metals. As the number of shells increase, the attraction between the nucleus and the valence electrons decreases leading to a soft-weak structure that can be even cut by a knife.

    3Thank You

    ANSWER

    • Posted by Mohit Kumar 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Sourasmita Dhar 6 years, 10 months ago

    Geometry can be determined along with shapes in Books.. where shape is determined by Lone pair ..

    0Thank You

    ANSWER

    • Posted by Jatin Solanki 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Prakhar J 6 years, 10 months ago

    Not all d block elements count as transition metals! A transition metal is one which forms one or more stable ions which have incompletely filled d orbitals. On the basis of this definition, scandium and zinc do not count as transition metals - even though they are members of the d block

    3Thank You

    ANSWER

    • Posted by Ritik Kumarmasih 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Priya Dharshini ? 6 years, 10 months ago

    You need to write aim,procedure,observation table all from ur lab manual

    2Thank You

    ANSWER

    • Posted by Manish Kumar Singh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Prakhar J 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 10 months ago

    An atomic orbital is under the influence of one nucleus while a molecular orbital is influenced by two or more nuclei depending upon the number of atoms in the molecule.

    4Thank You

    ANSWER

    • Posted by Littleshine Aaaru?? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 4 answers

    Punit Bihare 6 years, 10 months ago

    Wurtz reaction, pyrolysis, kolbe's electrolysis,acylation, alkylation, bromine water test, lindlar's reagent reaction, aeromatization reaction and NCERT question practice.?

    3Thank You

    Prakhar J 6 years, 10 months ago

    And the most important thing is that after finishing the chapter donot forget to have a look on NCERT questions. You can also go through the ncert important questions and exemplar questions given in this app. I think it may help u......... ??

    3Thank You

    Prakhar J 6 years, 10 months ago

    Donot learn any reaction, just know its mechanism that how its product been formed and if u have to score good marks just divide it four parts. Like alkanes,alkenes, alkynes, benzene. Then read one topic one day and try to memorize it. And within four days you will be finish hydrocarbons.

    2Thank You

    Prakhar J 6 years, 10 months ago

    All the naming reactions...like wurtz reaction, friedel craft reactions and many more.....

    2Thank You

    ANSWER

    • Posted by G H 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Prakhar J 6 years, 10 months ago

    The bond-dissociation energy is one measure of the strength of a chemical bond A–B. It can be defined as the standard enthalpy change when A–B is cleaved by homolysis to give fragments A and B, which are usually radical species.

    2Thank You

    ANSWER

    • Posted by Vinod Kumar 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Anshika Choudhary 6 years, 10 months ago

    proportion of neutral particles, such as those in a gas or aqueous solution, that are ionized to charged particles....

    2Thank You

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