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    • Posted by Vaishnavi Yadav 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Mishti ???? 5 years, 6 months ago

    Answer~~ Ionization energy is the energy required to remove an electron from a gaseous atom or ion. The first or initial ionization energy or Ei of an atom or molecule is the energy required to remove one mole of electrons from one mole of isolated gaseous atoms or ions. Regards.??

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    • Posted by Bhargav Rajput? 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Mishti ???? 5 years, 6 months ago

    Answer~~ Wilkinson's catalyst has the formula RhCl(PPh3)3. The IUPAC name (the scientific name that also describes its structure) is chlorotris(triphenylphosphone)rhodium(I). This name tells us that the rhodium is in an oxidation state of +1. The cool thing about Wilkinson's catalyst is its ability to selectively reduce alkenes, or double bonds. The selectiveness makes is useful when we need to reduce a specific double bond in a molecule. Regards. ??

    1Thank You

    Yogita Ingle 5 years, 6 months ago

    Wilkinson’s Catalyst [IUPAC Name: chloridotris(triphenylphosphine)rhodium(I)] is a coordination compound whose coordination centre is rhodium. It is extensively used as a catalyst in the hydrogenation of alkenes. The chemical formula of Wilkinson’s catalyst can be written as [RhCl(PPh3)3] where ‘Ph’ denotes a phenyl group. At ambient temperatures, this coordination complex exists as a reddish-brown solid.

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    • Posted by Khushi....? ??‍? 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    Ayush Vishwakarma?? 5 years, 5 months ago

    Now,Where are you khushi.........still waiting.......i m ok....

    1Thank You

    Bhargav Rajput? 5 years, 6 months ago

    Ovv thnks dear??

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Its my pleasure to help you.....you got the answer is awesome.....??

    2Thank You

    Bhargav Rajput? 5 years, 6 months ago

    Yup ur given idea is likeable n also help me a lot..but somehow i got that (iron salt used in blueprints) is mainly~~ Fe2(C2O4)3..✓

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Iska answer h....Iron(III) ferrocyanide, Fe4[Fe(CN)6]3 jo prussian blue colour ka hota h jiska manufacture Cu2+ k testing k time bhi hota h yeh K4[Fe(CN)6]...se hota h....hope so it helps you

    1Thank You

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    • Posted by Davneet Singh 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Khushi....? ??‍? 5 years, 6 months ago

    Slavery in Southern Africa existed until the abolition of slavery in the Cape Colony on 1 January 1834. This followed the British banning the trade of slaves between colonies in 1807 with their emancipation by 1834.

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    • Posted by Bhargav Rajput? 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    Bhargav Rajput? 5 years, 6 months ago

    Pakka??

    2Thank You

    Ankita ?? Arpita☺️ 5 years, 6 months ago

    C6 fe2 O12

    2Thank You

    Mishti ???? 5 years, 6 months ago

    C6Fe2o12

    1Thank You

    Bhargav Rajput? 5 years, 6 months ago

    Formula??

    1Thank You

    Mishti ???? 5 years, 6 months ago

    Ferric oxalate.dear.??

    1Thank You

    ANSWER

    • Posted by Anuj Kaushik 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Anuj Kaushik 5 years, 5 months ago

    @Mishti Thank you so much for your help.

    0Thank You

    Mishti ???? 5 years, 6 months ago

    Answer~~ An electrochemical cell involves transformation of energy between chemical and electrical forms by means of a redox reaction. It is of two types: 1)galvanic cell /voltaic cell(converts chemical energy into electrical energy) 2)electrolytic cell(converts electrical energy into chemical energy) I must thank you because answering this question helped me. Hope it helps you too. Regards. ??

    2Thank You

    Gaurav Seth 5 years, 6 months ago

    A galvanic cell is an electrochemical cell in which spontaneous redox processes occur allowing the continuous flow of electrons through the conductor, whereas, in an electrolytic cell, the redox reactions are influenced by an external source of current. In a galvanic cell, the chemical energy is converted to electric energy, but in an electrolytic cell, the electric energy is converted to chemical energy.

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    • Posted by Ayush Anand 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Mishti ???? 5 years, 6 months ago

    Answer~~ In my view its good because Phenolic acids are readily absorbed through the walls of your intestinal tract, and they may be beneficial to your health because they work as antioxidants that prevent cellular damage due to free-radical oxidation reactions. They may also promote anti-inflammatory conditions in your body when you eat them regularly. Regards. ??

    1Thank You

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    • Posted by Bhargav Rajput? 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 4 answers

    Bhargav Rajput? 5 years, 6 months ago

    ?

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Jitna mujhe pta tha bta diya baki.....?

    1Thank You

    Bhargav Rajput? 5 years, 6 months ago

    Yup.khushi it must be.. but i think yaha pe weight (zno) ka locha bhi hai...becoz (wool) word here meant that only...

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    The compound zinc oxide (ZnO) is called philosopher's wool. Alchemists, as part of their rituals, would burn zinc in air and collect the residue, which formed into white woolly tufts. They called it lana philosophica in Latin, meaning philosopher's wool.

    1Thank You

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    • Posted by Devika Harlalka 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Khushi....? ??‍? 5 years, 6 months ago

    While the term “phosphorescence” is derived from the ability of white phosphorus to glow faintly upon exposure to oxygen, the current chemical understanding is that this phenomenon is actually chemiluminescence, a mechanism of light emission distinct from phosphorescence.

    1Thank You

    Mohammad Adil 5 years, 6 months ago

    {chemiluminescence means glow in dark} white phosphorus emits faint a glow when exposed to oxygen because of a chemical reaction taking place on its surface only if the darkened room ots in has oxygen in it. Red phosphorus does not respond to absorbing radiation and thats why it doesn't glow in dark.

    0Thank You

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    • Posted by Devika Harlalka 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Khushi....? ??‍? 5 years, 6 months ago

    The oxoacids of Phosphorous which contain P−H bond have strong reducing properties. Thus, hypophosphorous acid is a good reducing agent as it contains two P−H bonds and reduces, for example, AgNO3 to metallic silver. These P−H bonds do not ionize to give H+ and do not play any role in basicity.

    0Thank You

    Mishti ???? 5 years, 6 months ago

    Answer~~ In phosphorous the bond between P and H is very much strong. It is non ionic in nature. The elecrtonegative of P atom is 2.19 and that of H atom is 2.2 so the bond form is very much strong. Hence the H attact to P are non ionisable. Regards. ??

    1Thank You

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    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Vikas Shukla 5 years, 6 months ago

    d[C] /dt = 2.5*10^-4. (given) Rate of reaction =( 2.5 *10^-4)/2 (because rate of reaction is 1/2 *d[C]/dt) so answer is 1.25*10^-4.

    2Thank You

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    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Khushi....? ??‍? 5 years, 6 months ago

    the unit of first-order rate constants are 1/sec.

    2Thank You

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    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Khushi....? ??‍? 5 years, 6 months ago

    Zero-Order Reactions. In some reactions, the rate is apparently independent of the reactant concentration. The rates of these zero-order reactions do not vary with increasing nor decreasing reactants concentrations. This means that the rate of the reaction is equal to the rate constant, k, of that reaction.

    1Thank You

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    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Mr. Badmash 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Khushi....? ??‍? 5 years, 6 months ago

    the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers is called stoichiometry.... And....The stoichiometric coefficient is the number written in front of atoms, ion and molecules in a chemical reaction to balance the number of each element on both the reactant and product sides of the equation. Though the stoichiometric coefficients can be fractions, whole numbers are frequently used and often preferred.

    1Thank You

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    • Posted by Sam Kuriakose 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Kareena Yadav 5 years, 6 months ago

    The phenomena of attracting and retaining the molecules of a substance on the surface is called adsorbtion

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    Adsorption is a process which involves the accumulation of a substance in molecular species in higher concentration on the surface. If we look at Hydrogen, Nitrogen and Oxygen, these gases adsorb on activated charcoal. Meanwhile, we have to note that adsorption is different from absorption. The two processes involve totally different mechanisms.

    For the adsorption process, two components are required,

    • Adsorbate: Substance which is deposited on the surface of another substance. For example, H2, N2 and O2 gases.
    • Adsorbent: Surface of a substance on which adsorbate adsorbs. For example, Charcoal, Silica gel, Alumina.

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. This process differs from absorption, in which a fluid is dissolved by or permeates a liquid or solid, respectively.

    2Thank You

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    • Posted by Swapna Shri 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Khushi....? ??‍? 5 years, 6 months ago

    Heat of fusion is a physical property as it does not involve any physical change in it. Just the matter changes its physical state due to the heat of fusion.

    1Thank You

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    • Posted by Sonam Kumari 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Khushi....? ??‍? 5 years, 6 months ago

    A bimolecular reaction can be kinetically first order in behaviour provided one of the reactants is taken in such a large excess that its concentration may hardly change. Such a reactant will not contribute to the order. Thus, a bimolecular reaction will be of first order.

    2Thank You

    Vikas Shukla 5 years, 6 months ago

    Generally molecularity and order of a reaction are same in elementary reaction. But in some cases order is found to be different. Such reactions are called Pseudo first order reactions. "This happens when one of the reactant is present in much excess quantity." ex - acidic hydrolysis of sucrose and Ester. (Molecularity is two but order is one.)

    2Thank You

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    • Posted by Sarthak Singh 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Mr. Badmash 5 years, 6 months ago

    there is not as such any particular methods for extraction of non metals as there are for metals but mostly oxidation of non metals is carried out for their extraction and some are also obtained as byproducts of metal extraction.

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    • Posted by Ammu Ammu 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 4 answers

    Vikas Shukla 5 years, 6 months ago

    Thanks ? both of u.

    2Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Yes excellent Vikas

    1Thank You

    Riya Rana 5 years, 6 months ago

    Good explanation!

    1Thank You

    Vikas Shukla 5 years, 6 months ago

    Hmm in simple words! Suppose u have prepared some tea. U can't drink it directly as it will have tea leaves too. Now u will pass it through sieve.It won't happen itself, u have to do it i.e. u applied some pressure say. In the cup u will have tea and In the sieve there will be tea leaves and other insoluble components. This is what happens in Reverse osmosis. Here tea is solvent. Sieve serves as semipermeable membrane. Work done by u serves as pressure higher than osmotic pressure. Now for osmosis suppose I gave u two buckets which have water but not in equal amount. Suppose to balance the level of water u put some pebbles. But remember amount of water is still different. The bucket with more pebbles will have less water. Now suppose that there is 6 L water in one bucket and 4L in other total is 10L. I asked u to balance the amount. U filled 5L in each. Now both have equal water. This happens in osmosis. I know it is very long but it is simple. Ise pdhne ke baad Ek baar book se bhi pdhna. Na samjh Aaye to Phir se pdhna Aakhir me samjh aa jayega. Hope it will help.

    4Thank You

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    • Posted by Niranjana Jayan 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Kareena Yadav 5 years, 6 months ago

    An ore is that which can be extracted from mineral by economically or conventially is called ore. A naturally occurring substances is known as mineral All ores are minerals but all minerals are not ores

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    A mineral is a naturally occurring solid that has a crystalline structure and a definite chemical formula. An ore is a rock that contains minerals in concentrations that are high enough for economical extraction. For example, bauxite is an aluminium ore.

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    • Posted by Mishti ???? 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    Sarthak Singh 5 years, 6 months ago

    Khushi

    1Thank You

    Vikas Shukla 5 years, 6 months ago

    U should start from that part which u think is easy. It can either be physical Chemistry or organic and even inorganic. But start from easy and end with difficult. This will boost your confidence. If u will start with difficult, u might end up in difficult situation which will affect ur performance. So I suggest start from easy part. Hope it helps!

    6Thank You

    Ayush Vishwakarma?? 5 years, 6 months ago

    Now you only 6 month and 2 month revision. So acoording to me take 2 month for each section : organic inorganic and physical.

    4Thank You

    Anushka ? 5 years, 6 months ago

    Even solutions is also quite easy.. Nd ya khushi is ryt.. Organic would b a better opt.

    3Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    You should first try the organics......as I preferred it first...

    5Thank You

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    • Posted by Ajay Malik 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Dona Debnath 5 years, 5 months ago

    ?

    0Thank You

    Mishti ???? 5 years, 6 months ago

    What do u mean dear??? ????

    2Thank You

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    • Posted by Sahdev Shekhawat 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 0 answers
    ANSWER

    • Posted by Ravi Yadav 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Kareena Yadav 5 years, 6 months ago

    Zn can't displace highly reactive ions from itself i.e.Na+

    0Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    Na+ because it is more reactive than Zn...

    1Thank You

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    • Posted by Satyajit Sahoo 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Gaurav Seth 5 years, 6 months ago

    (i) Antiseptic: Chemical substances which prevent the growth of microorganism or kill then are called antiseptics. These are not harmful to human living tissue these are applied to cuts, wounds, alsars, diseased skin surface some common example of antiseptics are: Detol, Sevlon, Tinchar, Iodine etc.
    (ii) Antacid: These are the chemical substances which nutrilize the excess acid and the race the pH to an appropriate level in the stomach the most commonly used anta acid are weak base such as sodium bicarbonate, magnesium hydroxide etc.
    (iii) Sulpha drug: Like antibotics sulpha drugs are used to kill microorganism there are prepared inaboratory for ex: Sulphadizine.
    (iv) Antifertility: Chemical substances which are used to control pragnency in women are called antifertility or birth control drugs. All these drug contain chemical relative to female *** harmones and steroids. Ex: Etynylesh adiol, Norethindrene.
    (v) Antipyretic: Chemicals used to reduce the body temperature during fever are called antipyretic Ex: Asprin, Paracetamole.

    1Thank You

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    • Posted by Kareena Yadav 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 5 answers

    Vikas Shukla 5 years, 6 months ago

    101% sure. Glucose hi h. Let me explain. Depression in freezing point is directly proportional to solute particles( colloigative property) . Concentration is same. • CaCl2--------> Ca^2+ + 2Cl^1- ( =3 ions ) • Nacl---------> Na^+ + Cl^1- (=2 ions) • Glucose won't dissociate as it is non - electrolyte. So no. of particles will be least in glucose. Depression in freezing point will be least too. So it will have highest freezing point.

    2Thank You

    Kareena Yadav 5 years, 6 months ago

    Sure h na 1 m glucose aayega

    1Thank You

    Khushi....? ??‍? 5 years, 6 months ago

    1 M glucose....

    2Thank You

    Vikas Shukla 5 years, 6 months ago

    Wait , wait !!! Sorry Vo upar vala answer Galat h. Cacl2 will have lowest freezing point as it will dissociate into 3 ions but as glucose has least no. of particles (non-elctrolyte) , so it will have highest freezing point.

    2Thank You

    Vikas Shukla 5 years, 6 months ago

    1 M cacl2

    1Thank You

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    • Posted by Aashrity .... 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Vikas Shukla 5 years, 6 months ago

    In initial rate method we can proceed the same reaction multiple time to determine the order of reaction and it's rate, by measuring it in each case. All variables are kept constant except the concentration of any one reactant.

    1Thank You

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    • Posted by Mitali Rananavare 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 5 years, 6 months ago

    Aldol Condensation can be defined as an organic reaction in which enolate ion reacts with a carbonyl compound to form β-hydroxy ketone or β-hydroxy aldehyde, followed by dehydration to give a conjugated enone. Aldol Condensation plays a vital role in organic synthesis, creating a path to form carbon-carbon bonds.

    1Thank You

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