Which of the following is the strongest nucleophile in an aqueous solution? (a) HO– (b) Cl– (c) Br– (d) I

Which of the following is the strongest nucleophile in an aqueous solution?
(a) HO–
(b) Cl–
(c) Br–
(d) I
by

1 Answer

Answer :

I–
by

Related questions

Which of the following statements concerning SN2 reactions of alkyl halides is not correct? (a) The rate of reaction depends on the concentration of the nucleophile. (b) The rate of reaction depends on the concentration of the alkyl halide. (c) The rate of reaction of a particular alkyl bromide depends on the steric accessibility of the carbon of the C-Br bond. (d) All alkyl iodides react more rapidly than all alkyl chlorides

Description : Which of the following statements concerning SN2 reactions of alkyl halides is not correct? (a) The rate of reaction depends on the concentration of the nucleophile. (b) The rate of reaction depends on the ... carbon of the C-Br bond. (d) All alkyl iodides react more rapidly than all alkyl chlorides

Last Answer : All alkyl iodides react more rapidly than all alkyl chlorides

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The reaction of 1-butene with bromine, Br2, in aqueous solution gives primarily 1-bromo-2-butanol. Identify the nucleophilic species in the reaction. (a) Br2 (b) Br– (c) H2O (d) HOBr

Description : The reaction of 1-butene with bromine, Br2, in aqueous solution gives primarily 1-bromo-2-butanol. Identify the nucleophilic species in the reaction. (a) Br2 (b) Br– (c) H2O (d) HOBr

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Which of the following is the strongest base in aqueous solution ? (1) Diethylamine (2) Triethylamine (3) Ammonia (4) Ethylamine

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Last Answer : Diethylamine

From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. (c) The element with smallest ionic radius. (d) The element with six electrons in the valence shell. (e) The element which is a liquid at room temperature. (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.

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Description : The increasing order of reactivity among group 1 elements is Li

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Arrange the following order of the property indicated: (a). F, Cl, Br and I (negative electron gain enthalpy) (b). Mg, Al, Si and Na (ionization enthalpy) (c). C, N, O and F (second ionization enthalpy)

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Last Answer : Ans. (a). I

Which of the following is the best leaving group? (a) F– (b) Cl– (c) Br– (d) I–

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Last Answer : I–

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Aqueous solution of how many of the following species turn blue limtus red ? (i) `SF_(4)` (ii) `PCl_(3)` (iii) `H_(2)O` (iv) `NO_(2)Cl` (v) `SF_(6)` (

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Aqueous solution of how many of the following species turn blue limtus red ? (i) `SF_(4)` (ii) `PCl_(3)` (iii) `H_(2)O` (iv) `NO_(2)Cl` (v) `SF_(6)` (

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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 pre

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An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5]

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Last Answer : Weight of NaCl = 10 kg Weight of H2O = 50 kg Total weight = 60 kg Weight % of NaCl = (10/ 60) * 100 =16.67% Weight % of H2O = (50/ 60) * 100 = 83.33% Molecular weight of NaCl = 58.5 k moles of NaCl ... 100 = 5.79% Mol % of H2O = (moles of H2O / Total moles)*100  = (2.78/ 2.949)*100 = 94.26%

`NH_(3) + NaOCl overset("golatin or " EDTA^(+))rarr` products The number of moles of `N - H` bonds present in one mole of the strongest nucleophile pr

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`NH_(3) + NaOCl overset("golatin or " EDTA^(+))rarr` products The number of moles of `N - H` bonds present in one mole of the strongest nucleophile pr

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The strongest base in aqueous solution among the following amines is :

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(A) Cation carriers, e.g., `H-Br,Cl-OH` and `Br-Br` and oxidising agents such as `O_(3)` and `R-O-O-R`, etc. act as electrophilic reagents. (R) Electr

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In a `S_(N^(2))` substitution reaction of the type `R-Br+Cl^(-)overset("DMF")rarrR-Cl+Br^(-)` Which one of the following has the highest relative rate

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For the following `(i) I^(-) (ii) Cl^(-) (iii) Br^(-)` the increasing order of nucleophilicity would be:

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Which has the smallest bond angle `X-S-X` in the given molecules ? (X=F, Cl, Br, I)

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A cationic complex has two isomers A & B. Each has one Co3+, five NH3 , one Br and one SO4 2 . A gives a white precipitate with BaCl2 solution while B gives a yellow precipitate with AgNO3 solution. (a) What are the possible structures of the complexes A and B ? (a) Will the two complexes have same colour ?

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Last Answer : (a) [CO (NH3 ) 5 Br] SO4 and [CO (NH3 ) 5 SO4 ] Br  (b) NO

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During electrolysis of aqeous solution of NaCl, there are two type of anions are present Cl- and –OH, Cl- is discharged first than –OH,although it is present below Cl- in electrochemical series. Give reason.

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Why cyanide ion act as ambident nucleophile ?

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Which of the following is not a correct statement about the electrophilic substitution mechanism of benzene? (a) Benzene functions as a nucleophile. (b) Formation of a carbocation intermediate is the rate-determining step. (c) The carbocation intermediate contains an sp3 hybridized carbon in the ring. (d) The addition product is a frequently observed minor product.

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Last Answer : The addition product is a frequently observed minor product.

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Last Answer : Once the nucleophile adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic

Which of the following factors has no effect on the rate of SN1 reactions? (a) the nature of the alkyl halide (b) the nature of the leaving group (c) the concentration of the alkyl halide (d) the concentration of the nucleophile

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Last Answer : the concentration of the nucleophile

Which of the following is the rate law for SN1 mechanisms? (a) Rate = k[Alkyl Halide] [Nucleophile] (b) Rate = k[Nucleophile] (c) Rate = k[Alkyl Halide](d) Rate = k1[Alkyl Halide] + k2[Nucleophile]

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Last Answer : Rate = k[Alkyl Halide]

Which of the following factors influence whether a reaction will proceed by an SN1, SN2, E1, or E2 mechanism? (a) Structure of the alkyl halide (b) Solvent (c) Concentration of reagents (d) Nature of the nucleophile (e) All of these

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Last Answer : All of these

Which of the following is not a possible reaction of a carbocation? (a) addition of a nucleophile (b) rearrangement to a more stable carbocation (c) addition of a proton to form an alkane (d) loss of a β-hydrogen to form an alkene

Description : Which of the following is not a possible reaction of a carbocation? (a) addition of a nucleophile (b) rearrangement to a more stable carbocation (c) addition of a proton to form an alkane (d) loss of a β-hydrogen to form an alkene

Last Answer : addition of a proton to form an alkane

Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds of alkynes are higher in energy than the bonds and are thus more reactive. (c) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

Description : Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds ... fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

Last Answer : Alkynes are generally more reactive than alkenes.

Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this process. (c) nucleophile tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.

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Last Answer : a more stable carbonium ion is generated.

In the reaction of propene with HCl, H+ ion acts as the : (a) electrophile (b) carbonium ion (c) nucleophile (d) carbanion

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Last Answer : electrophile

Which of the following statements is incorrect? (a) Electrons move toward positively charged locations. (b) An electron-rich atom is called an electrophile. (c) An electrophile is electron loving. (d) A nucleophile has a a pair of electrons it can share

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Last Answer : An electron-rich atom is called an electrophile.

Which of the following is not normally considered to be a nucleophile? (a) NH3 (b) CH3NH2 (c) HC≡C:– (d) CH3CH2+

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Last Answer : Lewis base

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Which of the following is a nucleophile? (a) AlCl3 (b) H3O+ (c) BF3 (d) CN–

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Which compound does not conduct electricity in aqueous solution ?

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Last Answer : Covalent compounds do not conduct electricity in aqueous solution.

Which compound conducts electricity in aqueous solution ?

Description : Which compound conducts electricity in aqueous solution ?

Last Answer : Ionic compounds conduct electricity in aqueous solution.

Which among the following is false about acids? (1) They give H+ ions in aqueous solution (2) Most acids contain hydrogen (3) They turn blue litmus red (4) They are bad conductor of electricity in aqueous solution

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Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at eathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.

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Last Answer : (1) Copper at eathode and oxygen at anode. Explanation: Copper is deposited at the cathode and is dissolved at the anode. Consequently the concentration of copper ions in solution remains constant. This can be used as a method of purification of copper as only pure copper is deposited at the cathode

One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

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The apparatus used to test acidity of aqueous solution is - (1) pH meter (2) Ammeter (3) Hygrometer (4) Acidmeter

Description : The apparatus used to test acidity of aqueous solution is - (1) pH meter (2) Ammeter (3) Hygrometer (4) Acidmeter

Last Answer : (1) pH meter Explanation: A pH meter is an electronic device used for measuring the pH (acidity or alkalinity) of a liquid. A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.

What product is formed when electricity is passed throughan aqueous solution of sodium chloride? (1) Sodium and water (2) Sodium oxide (3) Sodium and chlorine (4) Sodium hydroxide

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Last Answer : (4) Sodium hydroxide Explanation: When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product.