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    • Posted by Manisha Rawat 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Mudit Kashyap 6 years, 4 months ago

    20 marks objective question

    0Thank You

    Gargi Varshney 6 years, 4 months ago

    There is no information from cbse about 2019-20 board exam pattern.

    0Thank You

    ANSWER

    • Posted by Sarthak Pandey 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Sarthak Pandey 6 years, 4 months ago

    Thanks

    0Thank You

    Sohan .G 6 years, 4 months ago

    F2+2Cl^- ---> 2F^- +Cl2

    0Thank You

    ANSWER

    • Posted by Jatin Nainwal 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Mukan Jangra????? 6 years, 4 months ago

    0 order rx Because rate of rx. =k

    2Thank You

    Mudit Kashyap 6 years, 4 months ago

    2 only

    0Thank You

    ANSWER

    • Posted by Pinki Kumari 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Daksh Singh 6 years, 4 months ago

    1) Colloidal solutions are heterogeneous in nature . 2) Colloidal solutions are quite stable . 3) Colloidal solutions are readily passed through ordinary filter papers.

    1Thank You

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    Colloidal sols are heterogeneousin nature. They consists of two phases; the dispersed phase and the dispersion medium. (ii) The colloidal solutions are quite stable.

    1Thank You

    Mudit Kashyap 6 years, 4 months ago

    When light passes through it it scateers

    0Thank You

    ANSWER

    • Posted by Tyagi Igayt 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Mohmmad Zain 6 years, 4 months ago

    electron effinity for p block elements is electron gain enthalpy of p orbitals

    0Thank You

    Mudit Kashyap 6 years, 4 months ago

    It is the property at which to gain electron easily

    0Thank You

    ANSWER

    • Posted by Tyagi Igayt 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ram Sanehi 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Shabnam Pathan 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Gaurav Seth 6 years, 4 months ago

    <th>
    All the naturally occurring substances of metals which are present in the earth’s crust are known as Minerals. Ores are usually used to extract metals economically. A large amount of metals are present.
    All Minerals are not ores. All ores are minerals.
    Minerals are native form in which metals exist. Ores are mineral deposits.

    1Thank You

    ANSWER

    • Posted by Aniket Tyagi 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Annu Khandey 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Annu Khandey 6 years, 4 months ago

    Give me daily life example of multimolecular collide

    0Thank You

    S.... ????☺ 6 years, 4 months ago

    Alkyl halide does not formed hydrogen bonds in water

    0Thank You

    Shaksham Kumar 6 years, 4 months ago

    Haloalkanes cannot form hydrogen bond

    0Thank You

    ANSWER

    • Posted by Tannu Madaan 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 6 answers

    Tannu Madaan 6 years, 4 months ago

    First is orbital motion and second is spin motion

    0Thank You

    Tannu Madaan 6 years, 4 months ago

    No

    0Thank You

    Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

    rotatory and revolutionary... sis subko pta hai ye ??

    0Thank You

    White Rat Hackers ? Ceo 6 years, 4 months ago

    Everyone knows

    0Thank You

    Atul Sharma 6 years, 4 months ago

    First is rotatory and second is revolutionary motion

    0Thank You

    Atul Sharma 6 years, 4 months ago

    I knows

    0Thank You

    ANSWER

    • Posted by Prince Mishra 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 6 years, 4 months ago

    Compounds possessing hydroxyl and cyano groups on the same carbon atom are called cyanohydrins. These are produced by addition of HCN to aldehydes or ketones in weakly basic medium.

    Cyanohydrins are useful synthetic reagents because they are used to prepare {tex}\alpha{/tex}-hydroxy acids. For example: conversion of acetaldehyde to lactic acid via acetaldehyde cyanohydrin

    0Thank You

    ANSWER

    • Posted by A ? 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 6 answers

    A ? 6 years, 4 months ago

    Thanks everyone 4 ur suggestion ??

    0Thank You

    Mohmmad Zain 6 years, 4 months ago

    ncert and arihant

    0Thank You

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    Phle ncert or uske baad exampler

    1Thank You

    Alok Singh 6 years, 4 months ago

    Ncert

    0Thank You

    ꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

    Modern ABC for chemistry Class 12th

    1Thank You

    Vishal Singh 6 years, 4 months ago

    After ncert you can go for SP JAUHAR

    1Thank You

    ANSWER

    • Posted by Alok Kumar Shah 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    When order of the reaction is zero

    0Thank You

    Jk Verma 6 years, 4 months ago

    When the reaction is a zero order reaction.

    1Thank You

    ANSWER

    • Posted by Alok Kumar Shah 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 7 answers

    ꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

    Ohh sorry sorry bro...bhul gayi message nahi karna tha...abhi nahi karungi...?

    0Thank You

    ꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

    Rohan I need your help....

    0Thank You

    Î$Hîkâ Gûptâ???? 6 years, 4 months ago

    thanks mamta

    1Thank You

    ꧁≪Mämƭå ℭℏ۝ᑌĎℎàℜÿ? 6 years, 4 months ago

    Good ans Ishu ?

    2Thank You

    Amol Gùpta 6 years, 4 months ago

    Wlcm

    1Thank You

    Řøhăň Řąjpůť ✌️✊ 6 years, 4 months ago

    thx sis

    1Thank You

    Amol Gùpta 6 years, 4 months ago

    Bhai The answer is 1.15 angstrom because of synergic bond formation between metal and CO and the bond order of CO decreases

    1Thank You

    ANSWER

    • Posted by Sachin Yaduvanshi 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rakesh Kumar 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    Physical and inorganic

    0Thank You

    Satyam Kumar 6 years, 4 months ago

    Syllabus upto 1st term is ch-2,3,4,5,6,7,8, 9 Ch-1 is removed

    1Thank You

    Manika Gupta 6 years, 4 months ago

    First book + first 2 ch of organic

    1Thank You

    Rakesh Kumar 6 years, 4 months ago

    Jb pta nhi h to kyu faltu me reply dete ho

    1Thank You

    Pritesh Purohit 6 years, 4 months ago

    humko kaa malum

    2Thank You

    ANSWER

    • Posted by Sameer Ahmad 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 6 years, 4 months ago

    Toppers answersheet hasn't been released by CBSE yet.

    0Thank You

    ANSWER

    • Posted by Ashutosh Kumar 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pragati Saini 6 years, 4 months ago

    To learn the reactions.. dont learn it by writing the structure Nd the full rxn ... Learn it as writing the name of compound. For example propene +conc. H2s04 gives isopropyl hydrogen sulphate ....by chance you are not getting my words then again u can ask me I ll have another example for u ☺️

    1Thank You

    ANSWER

    • Posted by Alok Kumar Shah 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pragati Saini 6 years, 4 months ago

    Its nernst equation. ..u can find it by google also or given in every +2 class chemistry book...... its not difficult to find it??

    1Thank You

    ANSWER

    • Posted by Alok Kumar Shah 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Pragati Saini 6 years, 4 months ago

    Molecularity cannot be zero because, it would mean there is no reaction.

    1Thank You

    ANSWER

    • Posted by Divyansh Jain 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Priya Dharshini ? 6 years, 4 months ago

    Practice esr then do all name reactions... then basic reactions like phenol to benzene,benzene to phenol, benzaldehyde,chloro benzene,salisaaldehyde, nitro benzene and many more.. then conversions would be easy..

    0Thank You

    ANSWER

    • Posted by Ayesha Minhaz 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ayesha Minhaz 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Vijay Yadav 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Jk Verma 6 years, 4 months ago

    1).Melting and Boiling point ●The boiling point increases as the number of carbon atom in a carbon chain. ●For the same alkyl group,the boiling points of alkyl halides decrease in the order of: RI>RBr>RCl>RF. (This is because with the increase in mass and size of halogen atom , the magnitude of vader waals forces increases) ●The boiling points decreases with the size of branching. 2).Solubility The haloalkanes are only slightly soluble in water. 3).Density The density increases with increase in the number of carbon atoms and halogen atoms a.

    1Thank You

    ANSWER

    • Posted by Daksh Singh 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 4 years, 6 months ago

    Chelation therapy is the medical treatment for reducing the toxic effect of metals. Chelating agents are organic compounds that are capable of linking to metal ions to form less toxic species that are easily excreted from the body. Chelators bind metals and remove them from intracellular or extracellular spaces.

    0Thank You

    ANSWER

    • Posted by Lav Kumar 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 4 answers

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    Importance or Applications of Adsorption: (1) In the preparation of gas masks using activated charcoal to avoid poisonous gases like etc. (2) Froth floatation method used for concentration of sulphide ores is based on adsorption. (3) Silica gel can be used to remove moisture and to control humidity.

    0Thank You

    Lav Kumar 6 years, 4 months ago

    Thanks

    2Thank You

    Yogita Ingle 6 years, 4 months ago

    1. Production of high vacuum- Remaining traces of air in a vessel already evacuated by vacuum pump can be adsorbed by charcoal to create high vacuum
    2. Control humidity - Silica and aluminium gels can adsorb moisture and remove humidity
    3. Gas masks- Gas masks consist of activated charcoal or mixture of adsorbents and are used to breathe in coal mines
    4. Removing coloured substances from solutions- This is used in chromatographic analysis.
    5. Separation of inert gases- Different inert gases are adsorbed to different extents on coconut charcoal
    6. Heterogeneous catalysis- When gaseous reactants are adsorbed on the surface of a solid catalyst, the concentration of the reactants on the surface increases and thus, the rate of reaction also increases( adsorption theory). Eg- Using finely divided Nickel in the hydrogenation of vegetable oils
    1. Adsorption indicators- Many dyes have become useful due to adsorption. These dyes have been introduced as indicators especially in precipitation titrations. Eg- KBr is easily titrated with AgNO3 using eosin as the indicator
    1. Froth floatation process- When sulphide ore is shaken with pine oil and water, the ore particles are adsorbed on the froth that floats and the gangue prticles ( like silica, mud) settle down in the tank. This process is used in the concentration of sulphide ores
    2. Chromatographic analysis- The selective adsorption of some substances by a solution helps us separate components of a mixture. Example- All the dyes in ink
    3. Curing Diseases- Some drugs can adsorb the germs on them and hence, kill them saving us from diseases

    1Thank You

    Mohmmad Zain 6 years, 4 months ago

    1- production of high vacuum 2- gas masks 3- control of humidity 4- in curing diseases 5- removal of colouring matter from solutions 6- chromatographic analysis

    1Thank You

    ANSWER

    • Posted by Prachee Prasher 6 years, 4 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    K@Łp@N@ $Øđh!?? 6 years, 4 months ago

    Iodoform is a type of test that can used to differentiate between methanol and ethanol. When ethanol is warmed with Iodine in the presence of Naoh, it forms a yellow colored precipitate.Methanol on the other hand does not react positively to iodoform test.

    0Thank You

    Jk Verma 6 years, 4 months ago

    Iodoform test: Since ethanol contains the grouping CH3-CH and hence ,it gives yellow ppt | of iodoform. OH i.e. CH3-CH2-OH +4I2+6NaOH-----------> CHI3 +HCOONa+5NaI+5H2O (Yellow ppt.) On the other hand,methanol(CH3OH) does not contain the grouping of ---CH(OH)CH3 and hence it does not give the iodoforn test.

    0Thank You

    Nishu Goyal 6 years, 4 months ago

    Methaol have one carbon . It is poisonous. Ethanol have two carbon. It most commonly used as alcohol and non poisonous to body

    0Thank You

    ANSWER

    • Posted by Prachee Prasher 4 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sia ? 4 years, 6 months ago

    Hydrolysis of C2H5Br with refluxing aqueous KOH followed by acidification with dil HNO3 and subsequent treatment with AgNO3 gives light yellow ppt. of AgBr whereas C6H5Br does not gives this test.

    2Thank You

    ANSWER

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