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

`S_(N^(1))` mechanism for the hydrolysis of an alkyl halide involves the formation of intermediate:
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`S_(N^(1))` mechanism for the hydrolysis of an alkyl halide involves the formation of intermediate: ... B. carbocation C. carbanion D. none of these
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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?

Last Answer : Which of the following alkyl halides is hydrolysed by `S_(N^(1))` mechanism? A. `CH_(3)Cl` B. `CH_(3)CH_(2)Cl` ... (2)CH_(2)Cl` D. `(CH_(3))_(3)"CCl"`

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

Description : 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

Last Answer : All of these

The hydrolysis of 2-bromo-3-methylbutane by `S_(N^(1))` mechanism gives meinly:

Description : The hydrolysis of 2-bromo-3-methylbutane by `S_(N^(1))` mechanism gives meinly:

Last Answer : The hydrolysis of 2-bromo-3-methylbutane by `S_(N^(1))` mechanism gives meinly: A. 3-methyl-2- ... . 2,2-dimethyl-2-propanol D. 2-methyl-1-butanol

The compound that does not undergo hydrolysis by `S_(N^(1))` mechanism is :

Description : The compound that does not undergo hydrolysis by `S_(N^(1))` mechanism is :

Last Answer : The compound that does not undergo hydrolysis by `S_(N^(1))` mechanism is : A. `H_(2)C=CHCH_(2)Cl` B. `C_(6) ... )Cl` D. `C_(6)H_(5)CH(C_(6)H_(5))Cl`

(A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition state intermediate.

Description : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition state intermediate.

Last Answer : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition ... . D. IF (A) is incorrect but (R) is correct.

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

Description : 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

Last Answer : c. Secondary kinetic isotope effect

The order of reactivities of the following alkyl halides for a `S_(N^(2))` reaction is :

Description : The order of reactivities of the following alkyl halides for a `S_(N^(2))` reaction is :

Last Answer : The order of reactivities of the following alkyl halides for a `S_(N^(2))` reaction is : A. RF > RCl > RBr > ... RBr > RF > RI D. RI > RBr > RCl > RF

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

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

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

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

Last Answer : In order to prepare a `1^(@)` amine from an alkyl halide with simultaneous addition of one `CH_(2)` group in the ... C_(6)H_(4)(CO)_(2)N^(-)K^(+)`

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

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

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

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

Description : 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

Last Answer : primary amines form

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

Description : 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

Last Answer : Williamson's synthesis

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

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

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 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

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

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

Last Answer : secondary alkyl halide

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)

Description : 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 ... the C-X bond results from overlap of the sp2 orbital of carbon and the p orbital of the halogen (X)

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 reaction mechanism doe not involves carbocation as an intermediate ?

Description : Which of the following reaction mechanism doe not involves carbocation as an intermediate ?

Last Answer : Which of the following reaction mechanism doe not involves carbocation as an intermediate ? A. ... C. Fries Rearrangements D. Diels- Alder reaction

Which one of the following halogen compounds is difficult to be hydrolysed by `S_(N^(1))` mechanism?

Description : Which one of the following halogen compounds is difficult to be hydrolysed by `S_(N^(1))` mechanism?

Last Answer : Which one of the following halogen compounds is difficult to be hydrolysed by `S_(N^(1)) ... B. Isopropyl chloride C. Benzyl chloride D. Chlorobenzene

Which of the following undergoes nucleophilic substitution exclusively by `S_(N^(1))` mechanism?

Description : Which of the following undergoes nucleophilic substitution exclusively by `S_(N^(1))` mechanism?

Last Answer : Which of the following undergoes nucleophilic substitution exclusively by `S_(N^(1))` ... Isopropyl chloride C. Chlorobenzene D. Benzyl chloride

In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy involves ingesting Na HCO3. Reaction of this treatment is (A) NaHCO2 combines with cystine (B) NaHCO3 raises the pH above the isoelectric point of cystine (C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Description : In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy ... C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Last Answer : Answer : C

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.

Description : 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 ... hybridized carbon in the ring. (d) The addition product is a frequently observed minor product.

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

Which is/are correctly linked here? `{:(,"List I",,"List II"),((a),E_(1)Cb,(a),"Carbanion formation"),((b),E_(2),(b),"Stereo specific"),((c),S_(N^(1))

Description : Which is/are correctly linked here? `{:(,"List I",,"List II"),((a),E_(1)Cb,(a),"Carbanion formation"),((b),E_(2),(b),"Stereo specific"),((c),S_(N^(1))

Last Answer : Which is/are correctly linked here? `{:(,"List I",,"List II"),((a),E_(1)Cb,(a),"Carbanion formation" ... "),((d),E_(1),(d),"Carbocation formation"):}`

The mechanism of urine formation in nephron involves

Description : The mechanism of urine formation in nephron involves

Last Answer : The mechanism of urine formation in nephron involves A. Ultrafiltration B. Reproduction C. Diffusion D. Osmosis

The mechanism of dehydration of an alcohol to give an ether involves formation of (a) Carbonium ions(b) Carbanions(c) Free radicals(d) Carbenes:

Description : The mechanism of dehydration of an alcohol to give an ether involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes

Last Answer : Carbonium ions

The mechanism of dehydration of an alcohol to give an alkene involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes

Description : The mechanism of dehydration of an alcohol to give an alkene involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes

Last Answer : Carbonium ions

There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s) is/are true concerning energy converting transport? a. The site of energy conversion and transport in the plasma membrane involves the phospholipid component b. The Na+-K++-ATPase derives energy from hydrolysis of extracellular ATP c. In some systems, energy inherent in the transmembrane ion gradient can be used to drive transport of a second species d. Examples of species transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

Description : There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s ... transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

Last Answer : Answer: c, d The selectivity of the plasma membrane, although impressive, cannot account for the nonequilibrium composition of living cells. A cell can be maintained in a nonequilibrium state only by ... to drive the transport of a second species such as protons, calcium, amino acids, or glucose

Saponification involves the hydrolysis of fats and oils by- (1) water (2) washing soda (3) stearic acid (4) caustic soda

Description : Saponification involves the hydrolysis of fats and oils by- (1) water (2) washing soda (3) stearic acid (4) caustic soda

Last Answer : (4) caustic soda Explanation: Caustic soda (sodium hydroxide) is a versatile alkali. Its main uses are in the manufacture of pulp and paper, alumina, soap and detergents, petroleum products and chemical production.

Pick out the wrong statement. (A) For the manufacture of styrene, the major raw materials are benzene and ethylene (B) One important copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres (C) Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Description : Pick out the wrong statement. (A) For the manufacture of styrene, the major raw materials are benzene and ethylene (B) One important copolymer of styrene is SBR, which is widely ... D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

Last Answer : (D) Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available

General mechanism of size reduction in intermediate and fine grinder is by (A) Cutting action (B) Compression (C) Compression and tearing (D) Impact and attrition

Description : General mechanism of size reduction in intermediate and fine grinder is by (A) Cutting action (B) Compression (C) Compression and tearing (D) Impact and attrition

Last Answer : (D) Impact and attrition

Reaction involves isocyanate as intermediate porudct:

Description : Reaction involves isocyanate as intermediate porudct:

Last Answer : Reaction involves isocyanate as intermediate porudct: A. Curtius rearrangement B. Lossen ... C. Schmidt rearrangemnt D. Hofmann rearrangement

For location of soundings a range and one angle from the shore involves the following operations. Which one is correct? (A) A range line is established (B) The first and the last soundings and every tenth soundings are fixed by angular observations (C) The intermediate soundings are fixed by the time intervals (D) All the above

Description : For location of soundings a range and one angle from the shore involves the following operations. Which one is correct? (A) A range line is established (B) The first and the last soundings ... angular observations (C) The intermediate soundings are fixed by the time intervals (D) All the above

Last Answer : (D) All the above

Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to the corresponding alkyl bromide Reason: The n

Description : Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to the corresponding alkyl bromide Reason: The n

Last Answer : Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to ... D. Assertion is false, Reason is true

If `alpha, beta` are roots of equation `x^(2)-4x-3=0` and `s_(n)=alpha^(n)+beta^(n), n in N` then the value of `(s_(7)-4s_(6))/s_(5)` is

Description : If `alpha, beta` are roots of equation `x^(2)-4x-3=0` and `s_(n)=alpha^(n)+beta^(n), n in N` then the value of `(s_(7)-4s_(6))/s_(5)` is

Last Answer : If `alpha, beta` are roots of equation `x^(2)-4x-3=0` and `s_(n)=alpha^(n)+beta^(n), n in N` then the value ... 4s_(6))/s_(5)` is A. 4 B. 3 C. 5 D. 7

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated ... 56 mL B. 112 mL C. 168 mL D. 224 mL

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... . 0.8 g C. 4.2 g D. 0.98 g

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... 37.2 mL C. 5.6 mL D. 22.4 mL

`underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8)]^(2-))tounderset("Green")([(NH_(3))_(5)Co-O-O-Co(N

Description : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8)]^(2-))tounderset("Green")([(NH_(3))_(5)Co-O-O-Co(N

Last Answer : `underset("Brown")([(NH_(3))_(5)Co-O-O-Co(NH_(3))_(5)]^(4+)) underset("oxidise")overset([S_(2)O_(8) ... III " "IV" & "III" "III),("brown "" green"):}`

(A) In `S_(N^(2))` reactions, complete inversion of configuration takes place. (R) In `S_(N^(1))` reactions, retention but not the inversion takes pla

Description : (A) In `S_(N^(2))` reactions, complete inversion of configuration takes place. (R) In `S_(N^(1))` reactions, retention but not the inversion takes pla

Last Answer : (A) In `S_(N^(2))` reactions, complete inversion of configuration takes place. (R) In `S_(N^(1))` ... . D. IF (A) is incorrect but (R) is correct.

Which of the following are correct for `S_(N^(2))` reaction?

Description : Which of the following are correct for `S_(N^(2))` reaction?

Last Answer : Which of the following are correct for `S_(N^(2))` reaction? A. The reaction intermediate ... solvents D. It is favoured by stability of carbocation

Which of the following halides will be most reactive towards `S_(N^(2))` reaction?

Description : Which of the following halides will be most reactive towards `S_(N^(2))` reaction?

Last Answer : Which of the following halides will be most reactive towards `S_(N^(2))` reaction? A. `C_(6)H_(5)CH_(2 ... (2)-underset(Br)underset("| ")"CH"-CH_(3)`

KI in acetone, undergoes `S_(N)2` reaction with each of `P,Q ,R` and S The rates of the reaction very as `underset(P)(H_(3)C-Cl)` .

Description : KI in acetone, undergoes `S_(N)2` reaction with each of `P,Q ,R` and S The rates of the reaction very as `underset(P)(H_(3)C-Cl)` .

Last Answer : KI in acetone, undergoes `S_(N)2` reaction with each of `P,Q ,R` and S The rates of the reaction very as ` ... R gt Q gt S D. R gt P gt S gt Q

The most easily hydrolysed molecule under `S_(N^(1))` condition is:

Description : The most easily hydrolysed molecule under `S_(N^(1))` condition is:

Last Answer : The most easily hydrolysed molecule under `S_(N^(1))` condition is: A. allyl chloride B. benzyl chloride C. ethyl chloride D. isopropyl chloride

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

Description : 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

Last Answer : In a `S_(N^(2))` substitution reaction of the type `R-Br+Cl^(-)overset("DMF")rarrR-Cl+Br^(-)` Which one of ... CH_(2)Br` D. `(CH_(3))_(2)CH-CH_(2)Br`

Which of the following is the correct order of decreasing `S_(N^(2))` reactivity ?

Description : Which of the following is the correct order of decreasing `S_(N^(2))` reactivity ?

Last Answer : Which of the following is the correct order of decreasing `S_(N^(2))` reactivity ? A. `R_(2)CHXgtR_(3) ... 3)CXgtR_(2)CHXgtRCH_(2)X("X is a halogen")`