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    • Posted by Rajam 1969 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sangeeta Nara 6 years, 10 months ago

    Physical adsorp.=layer of gas can be adsorbed one over the other by van der Waals force Chemical adsorp.=chemical bond can be formed only with the layer of molecules coming in direct contact with the surface of adsorbent

    0Thank You

    ANSWER

    • Posted by Anjali Kalange 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    N Aaditya 6 years, 10 months ago

    Release of adrenaline hormone.

    1Thank You

    ANSWER

    • Posted by Rajam 1969 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    N Aaditya 6 years, 10 months ago

    Associated colloid is micelle and multimolecular is S8

    1Thank You

    ANSWER

    • Posted by Rajam 1969 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sangeeta Nara 6 years, 10 months ago

    They can be easily prepared by mixing with dispersed medium or they are quite stable & not easily precipitated .....

    1Thank You

    ANSWER

    • Posted by Ratnesh Pandey 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Gaurav Seth 6 years, 10 months ago

    1. Reduce ethanal/acetaldehyde to ethanol with hydrogen or lithium aluminiumhydride
    2. React ethanol with PCl5 to get chloroethane
    3. Use KCN to add extra one carbon in the chain, followed by acidic hydrolysis to get propanoic acid
    4. Propanoic acid is reduced by LiAlH4 to get propanol
    5. repeat step 2
    6. repeat step 3, but the product will be butanoic acid
    7. Reduce butanoic acid with LiAlH4 to get butan-1-ol

    0Thank You

    Anugya Priyadrshni 6 years, 10 months ago

    By treating with C2H5mgbr after that H3O+ and then witj pcc to obtain butan-2-one

    0Thank You

    ANSWER

    • Posted by Dawa Tshering Bhutia 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Imran Raza 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rohit Krishnaa 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Akash Shriwas 6 years, 10 months ago

    It will form alkene (propene)

    0Thank You

    ANSWER

    • Posted by Sangeeta Nara 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Aniket Jaiswal 6 years, 10 months ago

    No need to read other topics That's only for passing marks OK

    1Thank You

    Sangeeta Nara 6 years, 10 months ago

    Or koi topic pdhne ki zaroorat nhi h kya phir

    0Thank You

    Priya Kashyap 6 years, 10 months ago

    1) Adsorption and its types, factors affecting adsorption. 2) catalysis and its types, enzyme catalysis . 3) colloidal, types of colloids, its characteristics and preparations

    2Thank You

    ANSWER

    • Posted by Sara Khan 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    . . 6 years, 10 months ago

    The bond strength is weakest and hence the H can easily be removed to reduce a substance

    1Thank You

    ANSWER

    • Posted by Rajat Sood 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Anurag Anurag 6 years, 10 months ago

    3

    2Thank You

    ANSWER

    • Posted by Anshuman Student 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Shivam Chugh 6 years, 10 months ago

    Covalent bonds also

    0Thank You

    Shivam Chugh 6 years, 10 months ago

    Ionic bonds

    0Thank You

    ANSWER

    • Posted by Anshuman Student 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Aman Jakhar 6 years, 10 months ago

    Orbits are the fixed paths around which electrons revolve around the nucleus of the atom following the same principle as that of the planets. An orbit is a planar or two-dimensional circular pathway. The maximum number of electrons in a particular orbit is 2n2

    1Thank You

    Priya Kashyap 6 years, 10 months ago

    This type of question is usually not asked

    0Thank You

    ANSWER

    • Posted by Suhani Rana? 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Rishabh Jain 6 years, 10 months ago

    They both are type of adsorption

    3Thank You

    Yogita Ingle 6 years, 10 months ago

    (i) Physisorption and Chemisorption both are a surface phenomenon.
    (ii) Physisorption and Chemisorption both increase with increase in surface area

    2Thank You

    ANSWER

    • Posted by Ayush Tembhurkar 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    N Aaditya 6 years, 10 months ago

    Yes ,2 Cis and trans.

    2Thank You

    ANSWER

    • Posted by Sanchit Bajaj 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Mahavir Kumar 6 years, 10 months ago

    K=kf/kb

    2Thank You

    ANSWER

    • Posted by Manoj Kumar 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sonal Sonal 6 years, 10 months ago

    Nitrogen family and halogen and compounds

    1Thank You

    ANSWER

    • Posted by Ayush Tembhurkar 5 years, 8 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Vaibhav Singh Negi 6 years, 10 months ago

    Aniline do not undergo friedel crafts reactions because AlCl3 which is used as a Lewis acid and a catalyst in friedel crafts reactions being electron deficient acts as Lewis base and attacks on the lone pair of nitrogen present in aniline to form an insoluble complex which precipitates out and the reaction does not proceed..

    2Thank You

    ANSWER

    • Posted by Mayank K. Mahour 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pragya Gupta 6 years, 10 months ago

    Bravia lattice is a three dimentional structure form 14 regular pattrm ie call bravia lattic

    1Thank You

    ANSWER

    • Posted by Aleena Mariyam George 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Akash Deep Singh 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Akash Deep Singh 6 years, 10 months ago

    You are 100%sure

    0Thank You

    Sanchit Bajaj 6 years, 10 months ago

    yes. But you have just pass the examination. You get the marks around 25-28.

    1Thank You

    ANSWER

    • Posted by Ayush Tembhurkar 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Akash Shriwas 6 years, 10 months ago

    Alcohol also give halo form test which contains hydrogen on OH conatining carbon

    1Thank You

    N Aaditya 6 years, 10 months ago

    Aldehyde and ketone ex . RCHO,RCOCH3R may be H,alkyl or aryl group.

    0Thank You

    ANSWER

    • Posted by Abhay Srivastava 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Manish Kumar 6 years, 10 months ago

    mond process

    1Thank You

    Karuna Bala 6 years, 10 months ago

    Mond process

    4Thank You

    ANSWER

    • Posted by Varsha Chowdhury 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    Sonal Sonal 6 years, 10 months ago

    Pentahallide are more covalent because of 5 oxidation no. And BiH3 strogest reducing agent besause due to large size of Bi it formed a weak bond with hydrogen and get easily reduce the hydrone

    1Thank You

    Pragya Gupta 6 years, 10 months ago

    Like pcl5 form pcl4 &pcl6 ability to form sharing of electron is covalant whereas pcl3 cnt

    1Thank You

    Harshvardhan Srivastava 6 years, 10 months ago

    Penta halide are more covalent than tri halides because of +5 oxidation state and high polarisability.

    2Thank You

    Kartheek Chowdary Vattkuti 6 years, 10 months ago

    According to fajan's rule: cations with high positive charge and with small size will have higher attractions of shared pair which increases the pull on shared pair and thus produces the large covelent character.

    2Thank You

    Kartheek Chowdary Vattkuti 6 years, 10 months ago

    Due to small size of cation of pentahalides and large size of halide ions s

    1Thank You

    ANSWER

    • Posted by Suhani Rana? 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    During the roasting of pyrite ore, a mixture of FeO and Cu2O is obtained.
    2CuFeS2 + O2 {tex}\;\xrightarrow\triangle{/tex}Cu2S + 2FeS + SO2
    2Cu2S + 3O2 {tex}\;\xrightarrow\triangle{/tex} 2 Cu2O + 2SO2
    2FeS + 3O2 {tex}\;\xrightarrow\triangle{/tex} 2FeO + 2SO2

    The role of silica in the metallurgy of copper is to remove the iron oxide obtained during the process of roasting as 'slag'. If the sulphide ore of copper contains iron, then silica (SiO2) is added as flux before roasting. Then, FeO combines with silica to form iron silicate, FeSiO3 (slag).
    FeO + SiO2 {tex}\;\xrightarrow\triangle{/tex}  FeSiO3 (Slag)

    3Thank You

    ANSWER

    • Posted by Leena Gupta 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 4 answers

    Gagan Preet Kaur 6 years, 10 months ago

    Collectors give water -repellant properties to the surface of the ore particles to be floated OR Collectors enhance non-wettability of the ore particles

    1Thank You

    Manish Kumar 6 years, 10 months ago

    Enhance rhe non weatbility

    1Thank You

    Yogita Ingle 6 years, 10 months ago

    Collectors as the name suggest are used for collecting the ore particles in the Sulphide ore. They are phillic to the ores. They are normally pine oil, fatty acids etc. They get separated from the froath mixture and helps to eliminate the ore from the gangue particles.

    1Thank You

    Suhani Rana? 6 years, 10 months ago

    Collectors are pine oil,fatty acid or xanthates which increase the non wet ability of mineral particles.

    4Thank You

    ANSWER

    • Posted by Ayush Tembhurkar 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    Non Biodegradable Detergents are those detergents which cannot be degraded by the bacteria easily and hence create pollution. For example, Sodium -4- (1, 3, 5, 7- tetra methyl octyl) benzene sulphonate.

    5Thank You

    ANSWER

    • Posted by Vatsal Kumar 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Avral Gautam 6 years, 10 months ago

    When solute is mixed with solvent than the resultant vapour pressure increases this shows positive deviation.

    2Thank You

    ANSWER

    • Posted by Abhishek Srivastava 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ghanshyam Yadav 6 years, 10 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 10 months ago

    CO forms a volatile compound with Ni, Nickel carbonyl, under mild conditions(330-350K).  Impurities like iron and cobalt do not react under these conditions.  Nickel carbonyl being a gas is easily separated from solid impurities.  Ni is recovered as nickel carbonyl is easily decomposed by heating at 450-470K.

    3Thank You

    ANSWER

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