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

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
by

1 Answer

Answer :

All of these
by

Related questions

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

Description : 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

Last Answer : the concentration of the nucleophile

When dipentyl ether is treated with excess HI, through what type of mechanism(s) does the major product result? (a) SN2 (b) SN1 (c) E1(d) E2

Description : When dipentyl ether is treated with excess HI, through what type of mechanism(s) does the major product result? (a) SN2 (b) SN1 (c) E1 (d) E2

Last Answer : SN2

The acid-catalyzed dehydration mechanism for alcohols is best described as a(n) : (a) E1 . (b) E2 . (c) SN1 (d) SN2

Description : The acid-catalyzed dehydration mechanism for alcohols is best described as a(n) : (a) E1 . (b) E2 . (c) SN1 (d) SN2

Last Answer : E1 .

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

Predict the two most likely mechanisms for the reaction of 2-iodohexane with sodium ethoxide. (a) SN2 and SN1 (b) E1 and E2 (c) SN2 and E2 (d) E1 and SN1

Description : Predict the two most likely mechanisms for the reaction of 2-iodohexane with sodium ethoxide. (a) SN2 and SN1 (b) E1 and E2 (c) SN2 and E2 (d) E1 and SN1

Last Answer : SN2 and E2

Predict the two most likely mechanisms which occur when 2-iodohexane is heated in ethanol. (a) SN2 and SN1 (b) E1 and E2 (c) SN2 and E2 (d) E1 and SN1

Description : Predict the two most likely mechanisms which occur when 2-iodohexane is heated in ethanol. (a) SN2 and SN1 (b) E1 and E2 (c) SN2 and E2 (d) E1 and SN1

Last Answer : E1 and SN1

Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? (a) SN1 (b) SN2 (c) E1 (d) E2

Description : Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? (a) SN1 (b) SN2 (c) E1 (d) E2

Last Answer : E2

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]

Description : 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]

Last Answer : Rate = k[Alkyl Halide]

Which is the most reactive alkyl halide in a SN1 reaction? (a) CH3F (b) CH3Br (c) CH3I (d) CH3Cl

Description : Which is the most reactive alkyl halide in a SN1 reaction? (a) CH3F (b) CH3Br (c) CH3I (d) CH3Cl

Last Answer : CH3I

In a consecutive reaction system of the given figure bellow, when E1 is much greater than E2 , the yield of B increases with the (A) Increase of temperature (B) Decrease of temperature (C) Increase in initial concentration of A (D) Decrease in initial concentration of A

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Last Answer : (A) Increase of temperature

`S_(N^(1))` mechanism for the hydrolysis of an alkyl halide involves the formation of intermediate:

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Which reaction does not yield an ester as one of the products?(a) A carboxylic acid is heated with an alcohol (b) A Grignard reagent is added to a carboxylic acid (c) An acid halide is treated with an alcohol (d) An alkyl halide is heated with the salt of a carboxylic acid

Description : Which reaction does not yield an ester as one of the products? (a) A carboxylic acid is heated with an alcohol (b) A Grignard reagent is added to a carboxylic acid (c) An acid halide is treated with an alcohol (d) An alkyl halide is heated with the salt of a carboxylic acid

Last Answer : A Grignard reagent is added to a carboxylic acid

The reaction of a sodium alkoxide with an alkyl halide is called (a) Wurtz-Fittig reaction (b) Perkin reaction (c) Williamson's synthesis (d) Aldol condensation

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Grignard reagents do not show any reaction with (a) Alkoxyalkanes (b) Alkanones (c) Alkyl alkanoates (d) Acyl halides

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Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many-many. R1 and R2 do not have any attributes of their own. How many minimum number of tables are required to represent this situation in the Relational Model? (A) 4 (B) 3 (C) 2 (D) 1

Description : Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many-many. R1 and R2 do not have any ... are required to represent this situation in the Relational Model? (A) 4 (B) 3 (C) 2 (D) 1

Last Answer : (B) 3 

Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:-

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Last Answer : Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:- A. B. C. D.

There are three events E1, E2 and E3, one of which is must and only one can happen. -Maths 9th

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Last Answer : Since one and only one of the three events E1, E2 and E3 can happen, i.e, they are mutually exclusive. Therefore, P(E1) + P(E2) + P(E3) = 1 ...(i) Odds against E1 are 7 : 4 ⇒ Odds in favour of E1 are 4 : 7⇒ ... \(rac{1-rac{23}{88}}{rac{23}{88}}\) = \(rac{rac{65}{88}}{rac{23}{88}}\) = 65 : 23.

If the three independent events E1, E2 and E3, the probability that only E1 occurs is α, E2 occurs -Maths 9th

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Last Answer : (c) 6Let \(x\), y, z be the probabilities of happening of events E1, E2 and E3 respectively. Then, \(\alpha\) = P (occurrence of E1 only) = x (1 - y) (1 - z) \(\beta\) = P (occurrence of E2 only) = (1 - \(x\)) y (1 - ... (x\) = 6z (From (i) and (ii))⇒ \(rac{x}{z}\) = 6 ⇒ \(rac{P(E_1)}{P(E_3)}\) = 6.

De Broglie equation is (a) h/mv = 1 (b) E1 – E2 = hv (c) C = 1v (d) n1 = 2d sin q

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Last Answer : Ans:(a)

The de Broglie equation is (a) h/mv = 1 (b) hv = E2 - E1 (c) n 1 = 2d sin (d) c = hv

Description : The de Broglie equation is (a) h/mv = 1 (b) hv = E2 - E1 (c) n 1 = 2d sin (d) c = hv

Last Answer : Ans:(a)

As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File the points at the upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Description : As shown in the illustration, what maintenance would be required of the circuit components? EL-0058 A. Change out both 'C' units monthly. B. Clean the glass surrounding 'E1' & 'E2' as needed. C. File ... upper end of 'G' every six months. D. Take megger readings on 'E1' & 'E2' windings quarterly.

Last Answer : Answer: B

An atomic energy state in which more atoms are in the lower energy state E1 than in the excited state E2, is known as a) population inversion b) normal population c) stimulated population d) atomic population

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The emission in which the atom emits a photon of energy hf = E2 – E1 , in any arbitrary direction is a) Spontaneous emission b) stimulated emission c) induced emission d) both a & c

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The incident photon absorbed by an atom in the ground state E1, thereby leaving the atom in the excited state E2 , is a) spontaneous absorption b) stimulated absorption c) induced absorption d) both b & c

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6 In a two winding transformer, the primary and secondary induced emf E1 & E2 are always A. equal in magnitude B. anti phase with each other C. in phase with each other D. determined by load on transformer secondary

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When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form

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How should CH3CHClCH2CH3 be classified? (a) primary alkyl halide (b) secondary alkyl halide (c) tertiary alkyl halide (d) quarternary alkyl halide

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Which of the following is a secondary alkyl halide? (a) CH3Br(b) (CH3)3CBr (c) (CH3)2CHBr (d) (CH3)2CHCH2Br

Description : Which of the following is a secondary alkyl halide? (a) CH3Br (b) (CH3)3CBr (c) (CH3)2CHBr (d) (CH3)2CHCH2Br

Last Answer : (CH3)2CHBr

Which of the following statements is correct for a saturated alkyl halide? (a) the C–X bond results from overlap of the s orbital of carbon and the p orbital of the halogen (X) (b) the C–X bond results from overlap of the p orbital of carbon and the p orbital of the halogen (X) (c) the C–X bond results from overlap of the sp3 orbital of carbon and the p orbital of the halogen (X) (d) the C–X bond results from overlap of the sp2 orbital of carbon and the p orbital of the halogen (X)

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Last Answer : the C–X bond results from overlap of the sp3 orbital of carbon and the p orbital of the halogen (X)

Which of the following reagents cannot be used to prepare an alkyl chloride from an alcohol? (a) HCl + ZnCl2 (b) SOCl2 (c) NaCl (d) PCl5

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Last Answer : NaCl

In an alkyl halide substitution of hydrogen by deuterium results in slow formation of ion pair. This is known as? a. Ortho effect b. Mesomeric effect c. Secondary kinetic isotope effect d. Primary kinetic isotope effect

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Which compound reacts most rapidly by an SN1 mechanism? (a) Methyl chloride(b) Isopropyl chloride(c) Ethyl chloride(d) tert-Butyl chloride

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The leaks in a refrigeration system using Freon are detected by (a) halide torch which on detection produces greenish flame lighting (b) sulphur sticks which on detection gives white smoke (c) using reagents (d) sensing reduction in pressure.

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In order to prepare a `1^(@)` amine from an alkyl halide with simultaneous addition of one `CH_(2)` group in the carbon chain, the reagent used as sou

Description : In order to prepare a `1^(@)` amine from an alkyl halide with simultaneous addition of one `CH_(2)` group in the carbon chain, the reagent used as sou

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Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar aprotic solvents O-alkylation with alkyl halide.

Description : Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar aprotic solvents O-alkylation with alkyl halide.

Last Answer : Statement-1: In protic solvents phenoxide ion is alkylated primarily at C-alkylation whereas in polar ... Statement-1 is false, Statement-2 is true

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Description : Which alkyl halide would be preferred for the synthesis of the following ether by Williamson synthesis ? `H_(5)C_(2)-O-overset(CH_(3))overset(|)unders

Last Answer : Which alkyl halide would be preferred for the synthesis of the following ether by Williamson ... chloride C. Ethyl chloride D. Methyl chloride

Organic Chemistry: E2 reaction mechanism?

Description : Organic Chemistry: E2 reaction mechanism?

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What is mechanism of sn1 explain?

Description : What is mechanism of sn1 explain?

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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.

Which of the reactions between the following pairs of reagents proceeds by a mechanism that may be described as an electrophilic substitution? (a) Benzene + Br2/FeBr3 (b) Propene + Br2 (c) Acetone + NH2NH2 (d) Ethyl bromide + aq KOH

Description : Which of the reactions between the following pairs of reagents proceeds by a mechanism that may be described as an electrophilic substitution? (a) Benzene + Br2/FeBr3 (b) Propene + Br2 (c) Acetone + NH2NH2 (d) Ethyl bromide + aq KOH

Last Answer : Benzene + Br2/FeBr3

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e- ... the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → = Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V At cathode (reduction) : MnO-4(aq) + 8H+ ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + ... -reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V Af cathode (reduction) : MnO-4(aq) + 8H+ ( ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

Which of the following compounds will undergo an SN2 reaction most readily? (a) (CH3)3CCH2I (b) (CH3)3CCl (c) (CH3)2CHI (d) (CH3)2CHCH2CH2CH2I

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Last Answer : (CH3)2CHCH2CH2CH2I

Which of the following species is most reactive in a SN2 reaction? (a) CH3CH2Cl (b) CH3CH2Br (c) CH3CH2I (d) CH3CH2F

Description : Which of the following species is most reactive in a SN2 reaction? (a) CH3CH2Cl (b) CH3CH2Br (c) CH3CH2I (d) CH3CH2F

Last Answer : CH3CH2I

Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI

Description : Which of the following compounds would react most rapidly in an SN2 reaction? (a) CH3CH2I (b) CH2=CH–I (c) (CH3)2CHI (d) (CH3)3CI

Last Answer : CH3CH2I

SN1 reaction is having ......order. a. Zero b. First c. Second d. Third

Description : SN1 reaction is having ......order. a. Zero b. First c. Second d. Third

Last Answer : b. First

Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by __________, which decompose to give free radicals. (A) Organic peroxides (B) Sulphuric acid (C) Hydrofluoric acid (D) None of these

Description : Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by __________, which decompose to give free radicals. (A) Organic peroxides (B) Sulphuric acid (C) Hydrofluoric acid (D) None of these

Last Answer : (A) Organic peroxides

Which of the following alkyl halides is hydrolysed by `S_(N^(1))` mechanism?

Description : Which of the following alkyl halides is hydrolysed by `S_(N^(1))` mechanism?

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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

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Last Answer : addition of a proton to form an alkane