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    • Posted by Dharjeet Sharma 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Shyam Kishan Yadav 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Divyo Jyoti Sahu 6 years, 10 months ago

    No

    4Thank You

    ANSWER

    • Posted by Shyam Kishan Yadav 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Sanidhya Jadaun? 6 years, 10 months ago

    This is bcoz of absence of d- orbitals in the valence shell of carbon and presence of 3d-orbital in valence shell of silicon.Since silicon has vacant 3d orbital,it can accept electrons from electron donating species

    2Thank You

    Piyush Bansal 6 years, 10 months ago

    Because catenation occurs most readilyin carbon which forms covalent bonds with other carbon atoms to form longer chains and structures. This is the reason for the vast number of organic compound in nature

    2Thank You

    ANSWER

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

    CBSE > Class 11 > Chemistry
    • 3 answers

    Prakhar J 6 years, 10 months ago

    Welcome aditya

    1Thank You

    Sanidhya Jadaun? 6 years, 10 months ago

    .disadvantages of fuel cell : 1. Nitrogen Dioxide Emission Critics of hydrogen fuel cells argue that although these cells do not emit carbon after burning, they give out nitrogen dioxide and other emissions. Nitrogen dioxide is a toxic gas and can still be harmful when ingested by humans.2. Storage Issues Apart from taking much time to separate the compounds of hydrogen, this element is also a challenge to move and transport. 3.High Cost Aside from having to spend a lot of money to transport hydrogen, the time it takes to break down its elements makes the process expensive as well.

    3Thank You

    Sanidhya Jadaun? 6 years, 10 months ago

    Advantages of fuel cell : 1.Fuel cells have a higher efficiency than diesel or gas engines. 2.Most fuel cells operate silently, compared to internal combustion engines. They are therefore ideally suited for use within buildings such as hospitals. 3.Fuel cells can eliminate pollution caused by burning fossil fuels; for hydrogen fuelled fuel cells, the only by-product at point of use is water. 4.if the hydrogen comes from the electrolysis of water driven by renewable energy, then using fuel cells eliminates greenhouse gases over the whole cycle. 5.Fuel cells do not need conventional fuels such as oil or gas and can therefore reduce economic dependence on oil producing countries, creating greater energy security for the user nation.

    3Thank You

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    • Posted by Big Dady 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Google Boy 6 years, 10 months ago

    Organic inorganic each and every topic are important

    1Thank You

    Google Boy 6 years, 10 months ago

    Halokenes and stichiometry very very important topic in organic chemistry appearing some question from this topic in aiims entrance practice at least 10-15 times

    1Thank You

    Big Dady 6 years, 10 months ago

    Q

    1Thank You

    ANSWER

    • Posted by Yuvraj Singh Rajput 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Veena Singh☺️? 6 years, 10 months ago

    All aromatic compounds must have (4n+2) electron where n=0,1,2,3,.......&posseses usual stability due to the complete delocalisation of π electron.

    3Thank You

    ANSWER

    • Posted by Rahul Yadav 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Veena Singh☺️? 6 years, 10 months ago

    Negative part of adding molecule attach with that carbon atom which has less number of hydrogen

    0Thank You

    ANSWER

    • Posted by Rahul Yadav 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Lily ☺ 6 years, 10 months ago

    Kekule

    0Thank You

    ANSWER

    • Posted by Veer Singh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Saif Imam 6 years, 10 months ago

    1s2 2s2 2p6 3s2 3p6 4s0 3d10

    0Thank You

    ANSWER

    • Posted by Known Un 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Littleshine Aaaru?? 6 years, 10 months ago

    1.5 for states of matter,2 hrs for redox,5.5 for thermodynamics

    0Thank You

    Kritika Dhingra 6 years, 10 months ago

    2 hourse states of matter 3 hours for redox 4 hours for thermo

    0Thank You

    ANSWER

    • Posted by Anzal Khan 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    Mendeleev’s Periodic law is based upon atomic weights of elements, whereas Modem Periodic Law is based upon atomic number of elements. Mendeleev stated : "The properties of the elements are a periodic function of their atomic weights."
    Modern Periodic Law states : “The physical and chemical properties of the elements are periodic functions of their atomic numbers.”

    0Thank You

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    • Posted by Abhishek Walter 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Saif Imam 6 years, 10 months ago

    the reaction in which oxidation and reduction both takes place simultaneously is called redox reaction.

    0Thank You

    ANSWER

    • Posted by Adarsh Suresh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Saif Imam 6 years, 10 months ago

    It states that the total pressure exerted by the mixture of non reactive gases is equal to the sum of the partial pressure of individual gases. p(total)= P1+P2+P3+ - - - - - (at constant temperature and volume).

    0Thank You

    Adarsh Suresh 6 years, 10 months ago

    Ans

    4Thank You

    ANSWER

    • Posted by Rajat Sharma 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Sanidhya Jadaun? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 2 answers

    Sanidhya Jadaun? 6 years, 10 months ago

    Thank u Gaurav for ur help

    1Thank You

    Gaurav Seth 6 years, 10 months ago

    Nitration of benzene is an electrophilic substitution reaction. Presence of electron releasing group such as —CH3 activates the benzene nucleus towards electrophilic substitution while presence of electron withdrawing group such as —NO2 deactivates the benzene nucleus towards electrophilic substitution. Therefore, the ease of nitration decreases in the order
    Toluene > benzene > m-dinitrobenzene
    Thus, toluene will undergo nitration most easily.

    1Thank You

    ANSWER

    • Posted by Ankit Singh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Saif Imam 6 years, 10 months ago

    because on reacted with water it gives a strong base. Na2CO3+H2O---> NaOH+H2O+CO2

    1Thank You

    ANSWER

    • Posted by Ramchander Yadav 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Shruti Sharma 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Saif Imam 6 years, 10 months ago

    when isopropyl chloride is react in the presence of sodium and dry ether it gives 2,3 dimethyle butane according to wurtz's reaction.

    1Thank You

    ANSWER

    • Posted by Shruti Sharma 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Tushar Sisodia 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ayush Pandey 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Joel Mathew 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    Isomerism is a phenomenon in which two or more compounds have the same chemical formula but possess different properties because of different structural or spatial arrangements. Compounds which exhibit isomerism are called isomers. There are two types of isomerism:

    • Structural isomerism
    • Stereoisomerism

    2Thank You

    ANSWER

    • Posted by Joel Mathew 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Balraj Singh 6 years, 10 months ago

    By wurtz reaction

    0Thank You

    ANSWER

    • Posted by A J 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ankit Tiwari 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Veena Singh☺️? 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    • Molecules in which dipole moment is not ‘zero’ are called polar solvents.  Example: NaCl, HF, H2O…etc. The non-zero dipole moment in these molecules is mainly due to electronegativity difference between bonding atoms.
    • Molecules in which dipole moment is ‘zero’ are called non-polar solvents. Example: CCl4, H2, Cl2, O2…etc.  In non-polar molecules the dipole moment is zero due nearly equal in electronegativity of bonding atoms and also due to symmetry in structure.

    3Thank You

    ANSWER

    • Posted by Sukhwinder Singh 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 10 months ago

    carbon has highest degree of catenation because: 
    1. high C-C bond energy 
    2. tetravalency (large number of bonds) 
    3. small atomic size hence less diffused orbital 

    2Thank You

    ANSWER

    • Posted by Manojit Bhagat 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Saif Imam 6 years, 10 months ago

    let the oxidation state of carbon be (x) and take oxidation no. of O be (-2) x+ 2*(-2)=0 x-4=0 x=4 hence oxidation no of carbon is +4

    1Thank You

    ANSWER

    • Posted by Priya Mudegoud 6 years, 10 months ago

    CBSE > Class 11 > Chemistry
    • 1 answers

    Khushi Jain 6 years, 10 months ago

    1. At very high temperature 2. At very low pressure Real gases acts as ideal gases b/c due to very high temperature inter molecular distance become very large thus potential energy remove and only kinetic energy remain which is characteristic of ideal gas.

    0Thank You

    ANSWER

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

    CBSE > Class 11 > Chemistry
    • 1 answers

    Veena Singh☺️? 6 years, 10 months ago

    It is mixture of sodium hydroxide and calcium oxide

    0Thank You

    ANSWER

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