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    • Posted by Sahana Punith 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
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    • Posted by Savita Goswami 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 3 months ago

    White Phosphorus properties:

    1. Translucent in appearance like white waxy solid
    2. Poisonous in nature
    3. Less stable and more reactive
    4. Does not dissolve in water
    5. When mixed with carbon disulphide it dissolves
    6. Glows in the dark(chemiluminescence)

    Red phosphorus properties:

    1. Has iron grey lustre
    2. Odourless
    3. Nonpoisonous
    4. Solubility properties: does not dissolve in water and carbon disulphide
    5. Does not glow in the dark
    6. Chemically, white phosphorus is more reactive than red phosphorus

     

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    • Posted by Abdul Samad 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Khuskaran Sidhu 6 years, 3 months ago

    HNO3

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    Jk Verma 6 years, 3 months ago

    HNO3

    0Thank You

    ANSWER

    • Posted by Aditi Masuraha 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Khuskaran Sidhu 6 years, 3 months ago

    Ch3oh

    0Thank You

    Puja Saravana Kumar 6 years, 3 months ago

    CH3OH

    1Thank You

    Nishu Goyal 6 years, 3 months ago

    CH3OH

    1Thank You

    ANSWER

    • Posted by Rachit Bhawarkar 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Puja Saravana Kumar 6 years, 3 months ago

    Fermentation is an anaerobic process in which energy can be released from glucose even though oxygen is not available. Fermentation occurs in yeast cells, and a form of fermentation takes place in bacteria and in the muscle cells of animals.

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    • Posted by Prince Priyanshu 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Prince Priyanshu 6 years, 3 months ago

    What is the driving gas equipments

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    Sia ? 6 years, 3 months ago

    Surface-supplied diving breathing gas supply system, including:

    • Low pressure breathing air compressors.
    • High pressure gas storage equipment.
    • Breathing gas distribution panels.
    • Diver's umbilicals.
    • Diver voice communications equipment.
    • Gas reclaim system for deep heliox diving.
    • Gas blending systems.

    1Thank You

    ANSWER

    • Posted by Sajid Ali 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Karan Dhoundiyal 6 years, 3 months ago

    All the naturally occuringsubstance of metal which are present in the earths cruat are known as minerals.

    0Thank You

    Yogita Ingle 6 years, 3 months ago

    • All the naturally occurring substances of metals which are present in the earth’s crust are known as Minerals. All Minerals are not ores.
    • Ores are usually used to extract metals economically. A large amount of metals are present. All ores are minerals.

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    • Posted by Anushka Singh 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Bharti Jain 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 3 months ago

    Azeotropes are the binary mixtures of solutions that have the same composition in liquid and vapour phases and that have constant boiling points.

     A minimum-boiling azeotrope is formed by solutions showing a large positive deviation from Raoult’s law at a specific composition.

     Example: An ethanol–water mixture containing approximately 95% ethanol by volume

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    • Posted by Bharti Jain 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 3 months ago

    Molecular mass of polymers are obtained by osmotic pressure and it is used because it it is the most suitable coligative property for the determination of higher molar masses as, the osmotic pressure gives more accurate determination of molar mass than the elevation in boiling point method, it is because, when we see the formulas,
    We get for elevation in boiling point , ΔT = Kb . m  (where m = molality) 
    So, m =  ΔT / Kb  
    Further, moles of solute = molality(m) x mass of solvent in Kg 
    Molar mass = mass of unknown molecule/ moles of the unknown molecules
    Here, m depends on ΔT , which can vary and so the accurate molar mass is not found.
    Whereas, in case of Osmotic pressure(∏) ,  ∏ = MRT ( M = molarity)
    So, M = ∏ /RT 
    Hence, moles of solute = molality(m) x Volume of solution in L 
    Molar mass = mass of unknown molecule/ moles of the unknown molecules
    Here, we see that every quantity is fixed and so determination of molar mass will be accurate.

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    • Posted by Bharti Jain 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Bharti Jain 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Bushra Siddiqui 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    K@Łp@N@ $Øđh!?? 6 years, 3 months ago

    -2

    0Thank You

    Mukan Jangra????? 6 years, 3 months ago

    -2

    1Thank You

    ANSWER

    • Posted by Tanuj Tripathi 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Chanchal Kumari 5 years, 8 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Manika Gupta 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 3 months ago

    Organic is imp

    1Thank You

    Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 3 months ago

    Which chapter is coming in your exam

    0Thank You

    Navneet . 6 years, 3 months ago

    Sis there is approx equal marking in all chapters ... P block 8 marks

    1Thank You

    ANSWER

    • Posted by Anisha Sharma 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Manika Gupta 6 years, 3 months ago

    Since there is no full course in mid term thats y there is no any marks accurate distribution but u can prepare according to board marks distributuon as it nearly matches

    1Thank You

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    • Posted by Aishwarya Nath 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 6 years, 3 months ago

    In a nutshell, the difference between propan-1-ol and propan-2-ol is the position of their respective hydroxyl (-OH) groups. Propan-1-ol has an –OH group attached to its terminal carbon atom while propan-2-ol has an –OH group attached to its middle carbon atom.

    0Thank You

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    • Posted by Amol Gùpta 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 6 years, 3 months ago

    During extraction of aluminium, cryolite (Na3AlF6) is used to lower the melting point of mix and brings conductivity.

    1Thank You

    ANSWER

    • Posted by Ramesh Kumar 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pooja Bhakar 6 years, 3 months ago

    Co ordination number of platinum is 6 and oxidation state of platinum is +2. Also its IUPAC name is bis-(ethane 1,2di-amine)dichloroplatinum(||).

    1Thank You

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    • Posted by Narendra Jaat 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Pratham Modi 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Bhawana Karki 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 3 months ago

    When an element possess two or more different forms in the same state, they are called allotropes and the phenomenon is known as allotropy.
    Diamond and graphite are the two allotropes of carbon. They are chemically identical. When equal quantities of diamond and graphite are burnt, both of these produce the same amount of carbon dioxide. However, as they exist in different forms in the solid state, they have entirely different physical properties.

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    • Posted by Manisha Gujjar 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Disha Verma 6 years, 3 months ago

    C2H5OH in the presence of I2 orPI3 and heat then form idoethane then it treated in the presence of alc.KOH then obtained alkene( ethene).

    0Thank You

    Golu Sharma 6 years, 3 months ago

    In the presence of concentration H2S o4 then H2 S o4 brakes into H plus plus h s o 4 - 1

    0Thank You

    Abhishek Kumar Yadav 6 years, 3 months ago

    Take reagent H2/Pt

    0Thank You

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    • Posted by Niharika Kapil 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Samar M 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Dr. Dashrath Kumar Hinunia 6 years, 3 months ago

    First ethanol is reacted with Lithium aluminium hydride then it form Ethane with water after this we react Ethane with cl2 then it forms chloro Ethane after this chloroethane is reacted with potassium cyanide then it will form propanenitrile propanenitrile is reacted with H2 then it will form CH3 ch2 Ch double bond NH then after this it is reacted with H2O which by which professional is formed with the evolution of of ammonia gas

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    • Posted by Aakash Thakur 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Arpita Tiwari 6 years, 3 months ago

    When a reaction complete in more than one step then that reactions r called complex reaction

    0Thank You

    Yogita Ingle 6 years, 3 months ago

    Complex reaction: The reactions that occur as a result of sequence of elementary reactions to give the product is called complex reactions.   

    1Thank You

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    • Posted by Priyanshu Kumar 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Vikas Choudhary 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Dr. Dashrath Kumar Hinunia 6 years, 3 months ago

    It will form 2 chloro butane

    1Thank You

    Priyanshu Kumar 6 years, 3 months ago

    CH3-CH2-CHCl-CH3 + H2

    1Thank You

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    • Posted by Vikas Choudhary 6 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Ankita Jaiswal 6 years, 3 months ago

    Zinc is not considered as a transition element as its compound or ions contain a fully filled d orbital and r unstable.It has only one stable oxidation state which is Zn2+

    0Thank You

    Dr. Dashrath Kumar Hinunia 6 years, 3 months ago

    Zinc is not Transition Element because it has fulfilled electronic configuration in both as orbitals and the orbitals so it is referred as D block elements are not transition elements

    0Thank You

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