No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

    • Posted by Yukti Sharma 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Neha Garg 8 years, 2 months ago

    By friedal-craft acylation/acetylation electrophilic substitution reaction.

    4Thank You

    ANSWER

    • Posted by Mritunjay Jha 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Varun Banda 8 years, 2 months ago

    Dalton's Atomic Theory

    1) All matter is made of atoms. Atoms are indivisible and indestructible.

    2) All atoms of a given element are identical in mass and properties.

    3) Compounds are formed by a combination of two or more different kinds of atoms.

    4) A chemical reaction is a rearrangement of atoms.

    0Thank You

    ANSWER

    • Posted by Vinay Kumar 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Vinay Kumar 8 years, 2 months ago

    Impurity+Gangue=slag

    0Thank You

    Sajal Varshney 8 years, 2 months ago

    It is an insoluble substance obtained by adding impurities in conc.ore which will react with another impurity and form a new compound nd this compound is slag

    0Thank You

    ANSWER

    • Posted by Huma Reyaz 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sachin Kakodia 8 years, 2 months ago

    Third hexagonal close packed lattice

    0Thank You

    ANSWER

    • Posted by Abhishek Thakur 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sajal Varshney 8 years, 2 months ago

    For project file, mostly examiners want an investigatory one. So topics can choose are like cold drink content or sopanification or elevation in bp

    0Thank You

    ANSWER

    • Posted by Vanshika Sharma 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Sachin Kakodia 8 years, 2 months ago

    It tell about solubility higher would b value of Henry constant lower would be solubility

    1Thank You

    ANSWER

    • Posted by Manish Bakshi 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Sachin Kakodia 8 years, 2 months ago

    It act as solvent It decrease the melting point of Alumina to about 1173 Kelvin Addition of it increase the electrical conductivity

    1Thank You

    Lisa Yadav 8 years, 2 months ago

    Cryolite decreases the melting point of pure alumina and it also increases conductivity

    3Thank You

    ANSWER

    • Posted by Veeru Dayal 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Saurabh Sekhar 8 years, 2 months ago

    Atom is the smallest particle of molecule,two or more than two atoms combines and form molecule

    3Thank You

    ANSWER

    • Posted by Ashish Kumar 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Rishabh Verma 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Saurabh Sekhar 8 years, 2 months ago

    In solid particles are highly closed packed , intermolecular space is very small, that's why solids are rigid

    1Thank You

    Ritu Sharma 8 years, 2 months ago

    Solids are rigid due to the high intermolecular forces

    1Thank You

    ANSWER

    • Posted by Fatima Latest 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Jyotsna Yadav 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Dr. Kamlapati Bhatt 8 years, 2 months ago

    Denatured alcohol , also called as methylated spirit  is  ethanol that  has been made unsuitable for drinking purposes .It has additives to make it poisenous , foul smelling and also nauseating to discourage its  recreational consumption.Traditionally the main additive has been  10%  methanol. Besides this pyridine , acetone , methyl ethyl ketone , have also been used . Denotium is added to make it bitter tasting.    

    0Thank You

    ANSWER

    • Posted by Aakash Thakur 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Saurabh Sekhar 8 years, 2 months ago

    Because as reaction proceeds the concentration of reactant decreases and consentraion of product increases so for decreasing amount we use negative sign

    1Thank You

    Suresh Krishna 8 years, 2 months ago

    In a reaction the concentration of the reactants decreases and give rise to increase in concentration of the products.Thus the negative sign is used to indicate the reduce in concentration of the reactants.

    1Thank You

    ANSWER

    • Posted by Amresh Yadav 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Harsh Raghuvanshi 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Jeevesh Kumar 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Shristi Mourya 8 years, 2 months ago

    In this app only many papers are there u solve this only it's enough

    1Thank You

    ANSWER

    • Posted by Vikas Singh 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Nishu Jakhar 8 years, 2 months ago

    Due to hydrogen bonding in phenol

    0Thank You

    ANSWER

    • Posted by Ashraf Haris 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Shristi Mourya 8 years, 2 months ago

    From mudasar chemistry Search in you tube

    0Thank You

    ANSWER

    • Posted by Golu Gouta 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Anuj Kumar 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Varun Banda 8 years, 2 months ago

    The Lanthanide Contraction is caused by a poor shielding effect of the 4f electrons.

    Gd because as atomic number increases, the atomic radius decreases.

    Yb because it has a larger atomic number.

    0Thank You

    ANSWER

    • Posted by Anand Kishor Kumar 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Varun Banda 8 years, 2 months ago

    Adsorption is always exothermic. This statement can be explained in two ways. (i)Adsorption leads to a decrease in the residual forces on the surface of the adsorbent. This causes a decrease in the surface energy of the adsorbent. Therefore, adsorption is always exothermic. (ii)ΔH of adsorption is always negative. When a gas is adsorbed on a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative. ΔG= ΔH-TΔS Since ΔSis negative, ΔH has to be negative to make ΔG negative. Hence, adsorption is always exothermic

    0Thank You

    ANSWER

    • Posted by Vivek Garg 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Priya Maddheshiya 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Manoj Pillai 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Vaibhav Gupta 8 years, 2 months ago

    Amino acids are organic compounds containing amine and carboxyl functional groups.

    1Thank You

    ANSWER

    • Posted by Pooja Rajak 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Udit Choukarya 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Shirin Kalam 8 years, 2 months ago

    Amount of energy required to remove the outermost electron from isolated gaseous atom

    0Thank You

    ANSWER

    • Posted by Nikhil Yadav 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Anurag Singh 8 years, 2 months ago

    Ncert exampler question

    0Thank You

    ANSWER

    • Posted by Sahil Khan 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Preet Dixit 8 years, 2 months ago

    The product of magnitude of either of charge with distance between between the two charges. Doople moment= q×2L

    0Thank You

    Varun Banda 8 years, 2 months ago

    A dipole moment ​is a measurement of the separation of two opposite electrical charges .Dipole moments are a  vector quantity. The magnitude is equal to the charge multiplied by the distance between the charges and the direction is from negative charge to positive charge:

    μ = q · r

    1Thank You

    ANSWER

    • Posted by Dashrath Rana 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Neha Garg 8 years, 2 months ago

    As neither Zn nor Zn2+ ion show this condition so they are not transition elements

    1Thank You

    Neha Garg 8 years, 2 months ago

    Elements having (n-1)d subshell incompletely filled are transition elements

    0Thank You

    Varun Banda 8 years, 2 months ago

    The transition metals are compounds that form at least 1 stable ion where the compound has an incomplete d subshell. Therefore, Scandium is not a transition metal, because it forms only Sc3+ ions with n d-electrons, and Zn is not a transition metal because it forms only Zn2+ ions with all the 3d electrons present.

    2Thank You

    ANSWER

    • Posted by Ajay Singh 8 years, 2 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    myCBSEguide App

    myCBSEguide

    Trusted by 1 Crore+ Students

    Install Now

    Test Generator

    Test Generator

    Create papers online. It's FREE.

    Try Now

    CUET Mock Tests

    CUET Mock Tests

    75,000+ questions to practice only on myCBSEguide app

    Install Now
    Google Play

    Download myCBSEguide App

    All Courses

    Other Websites

    CBSE Courses

    Resources

    Corporate

    NCERT Solutions

    CBSE Sample Papers

    All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2026