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Addition of mercuric acetate in the pres...

Addition of mercuric acetate in the presence of water is called as oxymercuration.The adduct obtained gives alcohol on reduction with `NaBH_4` in alkaline medium.This is known as demercuration.Oxymercuration demercuration allows Markownikoff's addition of H, OH without rearrangement.The net result is the addition of `H_2O` Answer the following question :

Product 'A'is :

A

B

C

D

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Addition of mercuric acetate in the presence of water is called as oxymercuration.The adduct obtained gives alcohol on reduction with NaBH_4 in alkaline medium.This is known as demercuration.Oxymercuration demercuration allows Markownikoff's addition of H, OH without rearrangement.The net result is the addition of H_2O Answer the following question : CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)(C)-CH=CH_2underset((ii)CH_3OH NaBH_4NaOH)overset((i)Hg(OAc)_2.THF)toAoverset(HI(Conc.))toB Product B is :

Addition of water to alkenes in presence of conc. H_(2)SO_(4) produces alcohol Which rule is followed in this reaction?

Name the product obtained on addition of a water molecule of propene in the presence of dil. H_2SO_4

Addition of excess aqueous ammonia to a pink coloured aqueous solution of MCl_(2). 6H_(2)O(X) and NH_(4)Cl gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1:3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M., whereas it is zero for complex Y. Among the following options, which statement is incorrect ?

The colloidal particles are electrically charged as a indicated by their migration towards cathode or anode under the applied electric field. In a particular colloidal system, all particles carry either positive charge or negative charge. The electric charge on colloidal particles orginate in several ways. According to preferential adsorption theory, the freshly obtained precipitate particles adsorb ions from the dispersion medium, which are common to their lattice and acquire the charge of adsorbed ions. For example, For example, freshly obtained Fe(OH)_(3) precipitated is dispersed, by a little FeCl_(3) , into colloidal solution owing to the adsorption of Fe^(3+) ions in preference. Thus sol particles will be positively charged. In some cases the colloidal particles are aggregates of cations or anions having ampiphilic character. When the ions posses hydrophobic part (hydrocarbon end) as well as hydrophilic part (polar end group), they undergo association in aqueous solution to form particles having colloidal size. The formation of such particles, called micelles plays a very important role in the solubilization of water insoluble substances, (hydrocarbon, oils, fats, grease etc.). In micelles, the polar end groups are directed towards water and the hydrocarbon ends into the centre. The charge on sol particles of proteins depends on the pH. At low pH, the basic group of protein molecule is ionized (protonated) and at higher pH (alkaline medium), the acidic group is ionized. At isoelectric pH, characteristic to the protein, both basix and acidic groups are equally ionized. The stability of colloidal solution is attributed largely to the electric charge of the dispersed particles. This charge causes them to be coagulated or precipitated. On addition of small amount of electrolytes, the ions carrying oppiste charge are adsorbed by sol particles resulting in the neutralization of their charge. When the sol particles either with no charge or reduced charge, come closer due to Brownian movement, they coalesce to form bigger particles resulting in their separation from the dispersion medium. This is what is called coagulating or precipitation of the colloidal solution. The coagulating power of the effective ion, which depend on its charge, is expressed in terms of its coagulating value, defined as its minimum concentration (m mol/L) needed to precipitate a given sol. Which of the following ions would have the minimum coagulating value for sol obtained on peptizing Sn(OH)_(4) by little NaOH solution?

The colloidal particles are electrically charged as a indicated by their migration towards cathode or anode under the applied electric field. In a particular colloidal system, all particles carry either positive charge or negative charge. The electric charge on colloidal particles orginate in several ways. According to preferential adsorption theory, the freshly obtained precipitate particles adsorb ions from the dispersion medium, which are common to their lattice and acquire the charge of adsorbed ions. For example, For example, freshly obtained Fe(OH)_(3) precipitated is dispersed, by a little FeCl_(3) , into colloidal solution owing to the adsorption of Fe^(3+) ions in preference. Thus sol particles will be positively charged. In some cases the colloidal particles are aggregates of cations or anions having ampiphilic character. When the ions posses hydrophobic part (hydrocarbon end) as well as hydrophilic part (polar end group), they undergo association in aqueous solution to form particles having colloidal size. The formation of such particles, called micelles plays a very important role in the solubilization of water insoluble substances, (hydrocarbon, oils, fats, grease etc.). In micelles, the polar end groups are directed towards water and the hydrocarbon ends into the centre. The charge on sol particles of proteins depends on the pH. At low pH, the basic group of protein molecule is ionized (protonated) and at higher pH (alkaline medium), the acidic group is ionized. At isoelectric pH, characteristic to the protein, both basix and acidic groups are equally ionized. The stability of colloidal solution is attributed largely to the electric charge of the dispersed particles. This charge causes them to be coagulated or precipitated. On addition of small amount of electrolytes, the ions carrying oppiste charge are adsorbed by sol particles resulting in the neutralization of their charge. When the sol particles either with no charge or reduced charge, come closer due to Brownian movement, they coalesce to form bigger particles resulting in their separation from the dispersion medium. This is what is called coagulating or precipitation of the colloidal solution. The coagulating power of the effective ion, which depend on its charge, is expressed in terms of its coagulating value, defined as its minimum concentration (m mol/L) needed to precipitate a given sol. Under the influence of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using NaCl, Na_(2)SO_(4) and Na_(3)PO_(4) solutions. Their coagulating values will be in the order :

A white amorphous A on heating yields a colourless, non-combustible gas B a solid C .The latter compound assumes a yellow colour on heating and changes to white on cooling C dissolve in dilute hydrochloric acid and the resulting solution gives a white precipitate with K_(4)Fe(CN)_(6) solution .A dissolve in dilute HCI with the evolution of gas , which is identical in all respect B turns lime milky , but the milkiness disuppears with the contimous passage of gas solution of A as obtained above gives a white precipitate D on the addition of excess of NH_(4)OH and passing H_(2)S another portion of the solution gives initialy a white precipitate E on the addition of NaOH solution , which dissolves on further addition of base , identify the compounds A,B,C,D and E

Ester gives nucleophilic addition reaction followed by elimination reaction with carbon nucleopile. When carbon nucleophile is of an ester then the reaction is known as Claisen condensation reaction. This reaction is also carried out between ester and a ketone. A suC Cessful Claisen condensation requires an ester with two alpha- hydrogens and an equivalent amount of base rather than a catalytic amount of base. Consider the given reaction CH_(3)-COOC_(2)H_(5)underset(C_(2)H_(5)OH)overset(C_(2)H_(5)ONa)rarr"enolate ion"underset("Claisen condensation")overset("ether(X)")rarr Product For the above reaction the most reactive ester is :

A solution which remains in equilibrium with undissolved solute , in contact , is said to be saturated . The concentration of a saturated solution at a given temperature is a called solubility . The product of concentration of ions in a saturated solution of an electrolyte at a given temperature is called solubility product (K_(sp)) . For the electrolyte A_(x),B_(y) with solubility S. The solubility product (K_(sp)) is given as K_(sp) = x^(x) xx y^(y) xx S^(x-y) . While calculating the solubility of a sparingly . soluable salt in the presence of some strong electrolyte containing a common ion , the common ion concentration is practically equal to that of strong electrolyte containing a common ion . the common ion soncentration is practically equal to that of strong electrolyte . If in a solution , the ionic product of an electroylte exceeds its K_(sp) value at a particular temperature , then precipitation occurs . If two or more electrolyte are presentt in the solution , then by the addition of some suitable reagent , precipitation generally occurs in increasing order of their k_(sp) values . Solubility of some sparingly soluable salts , is sometimes enhanced through complexation . While we are calculating the solubility of some sparingly or pH of an electrolyte , the nature of cation of anion should be checked carefully whether there ion (s) are capable of undergoing hydrolysis or not . If either or both of the ions are capable of undergoing hydrolysis , it should be taken into account in calculating the solubility . While calculating the pH of an amphiprotic species , it should be checked whether or not cation can undergo hydrolysis . Total a_(H^(-)) = sqrt(K_(a_(1)xxK_(a_(2)))) (if cation do not undergo hydrolysis ) a_(H^(+)) = sqrt(K_(a_(1))((K_(w))/(K_(b)) - K_(a_(2)))) (if cation also undergoes hydrolysis ) where symbols have usual meaning . Solubility of solids into liquids is a function of temperature alone but solubility of gases into liquids is a function of temperature as well as pressure . The effect of pressure on solubility of gases into liquids is governed by Henry's law . The solubility of PbSO_(4) in water is 0.0303 g/l at 25^(@)C , its solubility product at that temperature is

A white amorphous powder (A) when heated gives a colourless gas (B), which turns lime water milky and the residue (C) which is yellow when hot but white when cold. The residue (C) dissolves in dilute HCl and the resulting solution gives a white precipitate on addition of potassium ferrocyanide solution. (A) dissolves in dilute HCl with the evolution of a gas which is identical in all respects with (B). The solution of (A) as obtained above gives a white precipitate (D) on addition of excess of NH_(4)OH and on passing H_(2)S . Another portion of this solution gives initially a white precipitate (E) on addition of NaOH which dissolves in excess of it. Compounds (A) to (E) are identified as:

RESONANCE ENGLISH-RANK BOOSTER-All Questions
  1. Addition of mercuric acetate in the presence of water is called as oxy...

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  2. Addition of mercuric acetate in the presence of water is called as oxy...

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  3. Addition of mercuric acetate in the presence of water is called as oxy...

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  4. (A)underset(250^@C)overset(Al2O3)to(B)underset((ii)AgOH)overset(HI)to(...

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  5. (A)underset(250^@C)overset(Al2O3)to(B)underset((ii)AgOH)overset(HI)to(...

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  6. The number of atoms in 5.4mole of Na are?

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  7. Mole fraction of ethyl alcohol in aqueous ethyl alcohol (C2H5OH) solut...

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  8. Mole fraction of ethyl alcohol in aqueous ethyl alcohol (C2H5OH) solut...

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  9. Mole fraction of ethyl alcohol in aqueous ethyl alcohol (C2H5OH) solut...

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  10. CH3-CH=CH2 reacts with Cl2 at 500^@C Find out total no . Of possible...

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  11. The number of atoms in 7.4mole of Na are?

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  12. Mole fraction of ethyl alcohol in aqueous ethyl alcohol (C2H5OH) solut...

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  13. The number of atoms in 0.4mole of Na are?

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  14. The number of atoms in 0.6mole of Na are?

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  15. When nucleophile encounters a ketone site of attack is

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  16. The only correct combination that reaction nature is stereospecific an...

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  17. When primary amine reacts with chloroform in ethanolic KOH then produc...

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  18. Study the following reactions and identify the reactant 'R'. It can be

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  19. Which can be the product of the following reaction

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  20. A gas cylinder was found unattended in a public place. The investigati...

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