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    • Posted by Ankit Gupta 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Arti Vishwakarma 7 years, 3 months ago

    Ammonia is a stronger base than phosphine because in ammonia the central atom Nitrogen is smaller hence electron density is concentrated with in smaller range and easily available. Whereas in the case of phosphine the size of phosphorous is large electron cloud is distributed in large area & not easily available.

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    • Posted by Ruvan Deep 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Muskan Singh 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    S M 7 years, 3 months ago

    A4B3?

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    • Posted by Diksha Yadav 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Aryan Rai 7 years, 3 months ago

    If you have either of two gmail or WhatsApp. You can provide me here. I'll send you. It also depends through which medium you are comfortable with. So either quote your gmail id here or your number.

    0Thank You

    Diksha Yadav 7 years, 3 months ago

    I meant that how i can achieve ur notes

    0Thank You

    Aryan Rai 7 years, 3 months ago

    What does this mean?

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    • Posted by Shivam Singh 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Ankur Vijayvargiya 7 years, 3 months ago

    It is the movement of water molecules from a region of high concentration to a region of low concentration, through a selectively permeable membrane

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    • Posted by Sweta Kumari 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Adithya Narayan 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    The development of graphene is taking place at a rapid pace. The nanomaterial can produced by many different methods, each of which produces different forms of graphene. These forms have often radically different qualities, which are suited for use in different applications. The exotic properties of graphene make it an attractive proposition to develop for use in many different types of device. Graphene is impermeable to all gases and is capable of sustaining high densities of electric current.

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    • Posted by Sugandh Varshney 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Saumya Agrawal 7 years, 3 months ago

    Make it cholorobenzolene by chronination and apply fittig reaction

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    • Posted by Akash Singh 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Unknown Student 7 years, 3 months ago

    BH3 exists, but as a dimer (B2H6 ) due to electron deficient nature.

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    • Posted by Sujjet Valmiki 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Vinay Kumar 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Gaurav Seth 7 years, 3 months ago

    Calcination refers to a process by which an ore, mainly carbonate and hydroxide,is heated in the absence of air to make it into an oxide ore.

    <hr />

    The carbonate ores are converted into oxides by heating strongly in presence of limited air is called calcination.

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    • Posted by Vivek Dubey 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    Van Arkel method for refining impure titanium. Mond's process for refining impure nickel.

    Ultra pure metals are being prepared by the Van Arkel Method. The compound so formed is then decomposed by heating to get the pure metal. Van Arkels method is used to purify crude titanium metal. It is heated with iodine to about 500K to form volatile compound.

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    • Posted by Ponnu P 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Tanya Majumdar 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Mayank Singh 7 years, 3 months ago

    Activation energy decreses on adding catalyst And gibss energy remain same no effect on it

    1Thank You

    Danish Khan 7 years, 3 months ago

    Hlw

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    • Posted by Kartiki Jat 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Manoj Mass 7 years, 3 months ago

    Add diazonium salt...phenol will give red dye but benzoic wont give

    1Thank You

    Jashaswi Talukdar 7 years, 3 months ago

    Lucas test

    1Thank You

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    • Posted by Tejaswini Rastogi 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Banani Das 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Varun Khurana 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yash Anand 7 years, 3 months ago

    Polymers can be classified on the basis of molecular forces like vander waals forces, hydrogen bonds & dipole dipole interactions.They are classified as : 1 elastomers- they have elastic character & have weak intermolecular forces.Eg natural rubber 2 Fibres- thay have strong hydrogen bond or dipole dipole interactions between polymers chain.Eg nylon 6,6 3 Thermoplastics- they have intermolecular forces intermediate between elastomers & fibres.Eg polythene 4 Thermosetting polymers- they undergoes permanent change on heating.Eg bakelite Therefore, Neoprene < polyvinyl chloride < Nylon 6.. I hope u r clear now..

    2Thank You

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    • Posted by Aryan Rai 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Mansi Sharma 7 years, 3 months ago

    First of all u need to learn all the name rxn` s and others and then start. There is no other option for this .

    2Thank You

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    • Posted by Shubhra Jyot 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Ha Rshit 7 years, 3 months ago

    Carryminati is a YouTuber

    2Thank You

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    • Posted by Ashutosh Rastogi 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pavankumar Anand 7 years, 3 months ago

    Density=( (molecular mass / Na) × (no of atoms in a unit cell) ) /volume you can equate this and get your answer

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    • Posted by Aman Singh 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    O Singh 7 years, 3 months ago

    Azodye test( coupling reaction)

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    • Posted by Shivani .. 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Arti Vishwakarma 7 years, 3 months ago

    Due to absence of any active site in their molecules, divalent oxygen is linked to carbon atoms on both sides ( c-o-c) .

    1Thank You

    Aryan Rai 7 years, 3 months ago

    Ethers are inert to most chemical reactions. Because,it is quite unreactive. diethyl ether makes an excellent solvent for many reactions. Many more organic compounds will dissolve in ether than in hydrocarbons, because the oxygen atom in ethers imparts some polar character to the ether molecule.

    2Thank You

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    • Posted by Shivani .. 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Aryan Rai 7 years, 3 months ago

    Zwitterion formerly called a dipolar ion, is a neutral molecule with both positive and negative electrical charges. (In some cases multiple positive and negative charges may be present.) Zwitterions are distinct from molecules that have dipoles at different locations within the molecule.

    3Thank You

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    • Posted by Saumya Agrawal 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Abhi Soni 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Shubhendu Tiwari 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    Entropy is a measure of degree of randomness of a system. Thus, if entropy increases the randomness also increases. The process which are generally accompanied by increases in entropy are generally called spontaneous or entropy driving reactions.

    A reaction takes place spontaneously if ∆G < 0.

    Now, ∆G=∆H-T∆S.

    If change in entropy ∆S is positive and large enough to make ∆G < 0 (when ∆H > 0), then the reaction proceeds in forward direction just because of positive entropy change and then the reaction is called entropy-driven reaction.

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    • Posted by P S 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    P S 7 years, 3 months ago

    Thanks yogita ji

    2Thank You

    Yogita Ingle 7 years, 3 months ago

    There are two reasons for this:
    1. Aromatic acids are stronger acids than the aliphatic acids. Since the benzene ring has -I effect, it causes stronger hydrogen bonds between molecules. This tend a close arrangement of molecules. So, the molecules are generally solid.
    2. Aromatic acids are higher molecular weight compounds. Compounds with high molecular weight are solids.

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    • Posted by P S 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Manish Yadav 7 years, 3 months ago

    Due to its resonance with the oxygen of OH group.

    1Thank You

    Kiara Khurrana 7 years, 3 months ago

    due to carbanion

    1Thank You

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    • Posted by P S 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    P S 7 years, 3 months ago

    Thanks yogita ji

    1Thank You

    Yogita Ingle 7 years, 3 months ago

    In chloroacetic acid inductive effect due to the presence of chlorine group increases the polarity of hydroxide bond and thus makes it more acidic as compared to acetic acid.

    Chlorine being a strong electron with drawing group. pulls the negative charge toward it self by inductive effect so that the negative charge density on the oxygen atom is reduced hence stabilizing the conjugate base of chloroacetic acid whil the negative charge of the oxygen atom in acetic acid is localized  and the conjugate  base is less stable.   

     

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