Which of the following correctly reflects relative stabilities of carbocations? (a) 3° allylic > 2° > 1° benzylic (b) methyl > 2° benzylic > 3° (c) 3° benzylic > vinyl > 1°(d) 2° allylic > 2° > vinyl

Which of the following correctly reflects relative stabilities of carbocations?
(a) 3° allylic > 2° > 1° benzylic
(b) methyl > 2° benzylic > 3°
(c) 3° benzylic > vinyl > 1°
(d) 2° allylic > 2° > vinyl
by

1 Answer

Answer :

(d) 2° allylic > 2° > viny
by

Related questions

Which of the following does not react with acyl chlorides to form amides : (a) ammonia (b) 1° amine (c) 2° amine (d) 3° amine

Description : Which of the following does not react with acyl chlorides to form amides : (a) ammonia (b) 1° amine (c) 2° amine (d) 3° amine

Last Answer : 3° amine

Consider a 1°, 2° and 3° amine, all of equivalent molecular weight. Which amine is most likely to have the lowest boiling point? (a) 1° amine (b) 2° amine (c) 3° amine (d) Not enough information to determine

Description : Consider a 1°, 2° and 3° amine, all of equivalent molecular weight. Which amine is most likely to have the lowest boiling point? (a) 1° amine (b) 2° amine (c) 3° amine (d) Not enough information to determine

Last Answer : 3° amine

A sample of pure amine molecules is found to possess no intermolecular Hbonding. This sample is most likely : (a) 1° amine (b) 2° amine (c) 3° amine (d) all of these

Description : A sample of pure amine molecules is found to possess no intermolecular Hbonding. This sample is most likely : (a) 1° amine (b) 2° amine (c) 3° amine (d) all of these

Last Answer : 3° amine

If the radius of a main curve is 300 m and length of the transition curve is 100 m, the angle with tangent to locate the junction point, is (A) 1° 11' (B) 2° 11' (C) 3° 11' (D) 4° 11'

Description : If the radius of a main curve is 300 m and length of the transition curve is 100 m, the angle with tangent to locate the junction point, is (A) 1° 11' (B) 2° 11' (C) 3° 11' (D) 4° 11'

Last Answer : Answer: Option C

The magnetic heading reference unit has a precision rate of: a. 1°/min b. 2°/min c. 5°/min d. 3°/min

Description : The magnetic heading reference unit has a precision rate of: a. 1°/min b. 2°/min c. 5°/min d. 3°/min

Last Answer : b. 2°/min

The magnetic heading reference unit has a precision rate of: a. 1°/min b. 2°/min c. 5°/min d. 3°/min

Description : The magnetic heading reference unit has a precision rate of: a. 1°/min b. 2°/min c. 5°/min d. 3°/min

Last Answer : b. 2°/min

Relative stabilities of the following carbocations will be in the order:

Description : Relative stabilities of the following carbocations will be in the order:

Last Answer : Relative stabilities of the following carbocations will be in the order: A. I lt II lt III lt IV B. IV lt III ... lt III lt I D. II lt IV lt III lt I

For clear distinct vision, images of obstructions should fall on the retina with a cone of (A) 2° (B) 3° (C) 4° (D) 5°

Description : For clear distinct vision, images of obstructions should fall on the retina with a cone of (A) 2° (B) 3° (C) 4° (D) 5°

Last Answer : Answer: Option D

(A) In allylic substitution propene gives allyl bromide. (R) NBS is a selective brominating agent and gives substitution at the alpha carbon with resp

Description : (A) In allylic substitution propene gives allyl bromide. (R) NBS is a selective brominating agent and gives substitution at the alpha carbon with resp

Last Answer : (A) In allylic substitution propene gives allyl bromide. (R) NBS is a selective brominating agent and gives ... (A) is incorrect but (R) is correct.

For glyburide, all of the following metabolic reactions are logical EXCEPT (A) O-demethylation (B) aromatic oxidation (C) benzylic hydroxylation (D) amide hydrolysis

Description : For glyburide, all of the following metabolic reactions are logical EXCEPT (A) O-demethylation (B) aromatic oxidation (C) benzylic hydroxylation (D) amide hydrolysis

Last Answer : (B) aromatic oxidation

The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due to

Description : The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due to

Last Answer : The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due to A ... and `sigma rarrpi^(**)` electron delocalizations

Consider a small aliphatic 1° amine, 1° alcohol, ester, carboxylic acid, and amide, all of similar molecular weight. Which one is most likely to have thehighest boiling point?(a) The amide(b) The alcohol(c) The ester(d) The carboxylic acid

Description : Consider a small aliphatic 1° amine, 1° alcohol, ester, carboxylic acid, and amide, all of similar molecular weight. Which one is most likely to have the highest boiling point? (a) The amide (b) The alcohol (c) The ester (d) The carboxylic acid

Last Answer : The amide

Which of the following reagents can be used to oxidize 1° alcohols to aldehydes? (a) KMnO4 (b) MnO2 (c) K2Cr2O7 (d) PCC

Description : Which of the following reagents can be used to oxidize 1° alcohols to aldehydes? (a) KMnO4 (b) MnO2 (c) K2Cr2O7 (d) PCC

Last Answer : PCC

Goitrogenic substance present in cabbage is (A) 5-vinyl-2 thio oxalzolidone (B) Pyridine-3-carboxylic acid (C) 3-Hydroxy-4, 5-dihydroxymethyl1–2-methyl pyridine (D) δ-ALA dehydratase

Description : Goitrogenic substance present in cabbage is (A) 5-vinyl-2 thio oxalzolidone (B) Pyridine-3-carboxylic acid (C) 3-Hydroxy-4, 5-dihydroxymethyl1–2-methyl pyridine (D) δ-ALA dehydratase

Last Answer : Answer : A

Nylon-66 is a polyamide of (A) Hexamethylene diamine and adipic acid (B) Adipic acid and methyl amine (C) Vinyl chloride and formaldehyde (D) None of these

Description : Nylon-66 is a polyamide of (A) Hexamethylene diamine and adipic acid (B) Adipic acid and methyl amine (C) Vinyl chloride and formaldehyde (D) None of these

Last Answer : (A) Hexamethylene diamine and adipic acid

In "auditing" accounting data, the auditor is concerned with a. Analyzing the financial information to be sure that it complied with government requirement. b. Determining if fraud has occurred. c. Determining whether recorded information properly reflects theeconomic events that occurredduring the accounting period.d. Determining if taxable income has beencalculated correctly

Description : In "auditing" accounting data, the auditor is concerned with a. Analyzing the financial information to be sure that it complied with government requirement. b. Determining if fraud has ... that occurred during the accounting period. d. Determining if taxable income has been calculated correctly

Last Answer : economic events that occurred during the accounting period.

Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about (A) 1 to 2° (B) 2 to 5° (C) 5 to 10° (D) 10 to 15°

Description : Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about (A) 1 to 2° (B) 2 to 5° (C) 5 to 10° (D) 10 to 15°

Last Answer : (B) 2 to 5°

The cutter bar is set at about to the direction of motion in order to overcome the back-pushing action of the crops. a. 90° with inward lead of 2° c. 92° with inward lead of 2° d. None of above

Description : The cutter bar is set at about to the direction of motion in order to overcome the back-pushing action of the crops. a. 90° with inward lead of 2° c. 92° with inward lead of 2° d. None of above

Last Answer : Ans-         b. 88° with inward lead of 2°  

The following statement is not true of ‘potency’ of a drug: A. Refers to the dose of the drug needed to produce a certain degree of response B. Can be related to that of its congeners by the relative position of its dose-response curve on the dose axis C. It is often not a major consideration in the choice of a drug D. It reflects the capacity of the drug to produce a drastic response

Description : The following statement is not true of potency' of a drug: A. Refers to the dose of the drug needed to produce a certain degree of response B. Can be related to that of its congeners by ... consideration in the choice of a drug D. It reflects the capacity of the drug to produce a drastic response

Last Answer : D. It reflects the capacity of the drug to produce a drastic response

The following statement is not true of ‘potency’ of a drug: A. Refers to the dose of the drug needed to produce a certain degree of response B. Can be related to that of its congeners by the relative position of its dose-response curve on the dose axis C. It is often not a major consideration in the choice of a drug D. It reflects the capacity of the drug to produce a drastic response

Description : The following statement is not true of potency' of a drug: A. Refers to the dose of the drug needed to produce a certain degree of response B. Can be related to that of its congeners by ... consideration in the choice of a drug D. It reflects the capacity of the drug to produce a drastic response

Last Answer : D. It reflects the capacity of the drug to produce a drastic response

An increase of 1° – 2°C in ocean temperatures for a long time can lead to …………………. of corals. 

Description : An increase of 1° – 2°C in ocean temperatures for a long time can lead to …………………. of corals. 

Last Answer : Choose the correct option by identifying the correct correlation in the sentence: An increase of 1° - ... ) bleaching (c) death (d) congregation

If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on (A) Staff normal (B) Staff vertical (C) Staff normal as well as vertical (D) None of these

Description : If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on (A) Staff normal (B) Staff vertical (C) Staff normal as well as vertical (D) None of these

Last Answer : (A) Staff normal

If degree of a road curve is defined by assuming the standard length of an arc as 30 metres, the radius of 1° curve is equal (A) 1719 m (B) 1146 m (C) 1046 m (D) 1619 m

Description : If degree of a road curve is defined by assuming the standard length of an arc as 30 metres, the radius of 1° curve is equal (A) 1719 m (B) 1146 m (C) 1046 m (D) 1619 m

Last Answer : Answer: Option A

At a range of 200nm from a VOR, if there is an error of 1°, how far off the centreline is the aircraft? a. 3.5nm b. 1.75nm c. 7nm d. 1nm

Description : At a range of 200nm from a VOR, if there is an error of 1°, how far off the centreline is the aircraft? a. 3.5nm b. 1.75nm c. 7nm d. 1nm

Last Answer : a. 3.5nm

Which one of the following carbocations are most stable?

Description : Which one of the following carbocations are most stable?

Last Answer : Which one of the following carbocations are most stable? A. B. C. D.

Which one of the following carbocations are most stable?

Description : Which one of the following carbocations are most stable?

Last Answer : Which one of the following carbocations are most stable? A. B. C. D.

(A) Tertiary carbocations are generally formed more easily than primary carbocations. (R) Hyperconjugation as well as inductive effect due to addition

Description : (A) Tertiary carbocations are generally formed more easily than primary carbocations. (R) Hyperconjugation as well as inductive effect due to addition

Last Answer : (A) Tertiary carbocations are generally formed more easily than primary carbocations. (R) Hyperconjugation as ... A) is incorrect but (R) is correct.

The order of stability of the following carbocations: `underset("I")(CH_(2)C=CH-overset(o+)CH_(2))" , "underset("II")(CH_(3)-CH_(2)-overset(o+)CH_(2))

Description : The order of stability of the following carbocations: `underset("I")(CH_(2)C=CH-overset(o+)CH_(2))" , "underset("II")(CH_(3)-CH_(2)-overset(o+)CH_(2))

Last Answer : The order of stability of the following carbocations: `underset("I")(CH_(2)C=CH-overset(o+)CH_(2))" , "underset ... . II gt III gt I D. I gt II gt III

Which of the following carbocations will be more stable?

Description : Which of the following carbocations will be more stable?

Last Answer : Which of the following carbocations will be more stable? A. `Ph_(3)C^(+)` B. `CH_(3)-overset(+)CH_(2)` ... (+)CH` D. `CH_(2)=CH-overset(+)CH_(2)`

Which of the following carbocations is most stable?

Description : Which of the following carbocations is most stable?

Last Answer : Which of the following carbocations is most stable? A. B. C. D.

Among the following carbocations : (I) `Ph_(2)overset(+)"C"CH_(2)Me (II) PhCH_(2)CH_(2)overset(+)"C"HPh` `"(III) "Ph_(2)CHoverset(+)"C"HMe" (IV) "Ph_(

Description : Among the following carbocations : (I) `Ph_(2)overset(+)"C"CH_(2)Me (II) PhCH_(2)CH_(2)overset(+)"C"HPh` `"(III) "Ph_(2)CHoverset(+)"C"HMe" (IV) "Ph_(

Last Answer : Among the following carbocations : (I) `Ph_(2)overset(+)"C"CH_(2)Me (II) PhCH_(2)CH_( ... B. `IgtIIgtIIIgtIV` C. `IIgtIgtIVgtIII` D. `IgtIVgtIIIgtII`

Consider the following carbocations : (I) `C_(6)H_(5)overset(+)(C )H_(2)` (II) `C_(6)H_(5)CH_(2)overset(+)(C )H_(2)` (III) `C_(6)H_(5)overset(+)(C )HC

Description : Consider the following carbocations : (I) `C_(6)H_(5)overset(+)(C )H_(2)` (II) `C_(6)H_(5)CH_(2)overset(+)(C )H_(2)` (III) `C_(6)H_(5)overset(+)(C )HC

Last Answer : Consider the following carbocations : (I) `C_(6)H_(5)overset(+)(C )H_(2)` (II) `C_(6)H_(5)CH_(2)overset(+ ... lt I lt II lt IV D. IV lt III lt I lt II

Which one of the following carbocations is most stable?

Description : Which one of the following carbocations is most stable?

Last Answer : Which one of the following carbocations is most stable? A. `C_(6)H_(5)-overset(+)CH-C_(6)H_(5)` B. `CH_(3) ... (2)` D. `H_(2)C=CH-overset(+)CH-CH_(3)`

The stability order in the following carbocations, `CH_(3)CH_(2)^(+)"(I), "(CH_(3))_(2)overset(+)CH"(II), "(CH_(3))_(3)C^(+)"(III) "overset(+)CH_(3)"(

Description : The stability order in the following carbocations, `CH_(3)CH_(2)^(+)"(I), "(CH_(3))_(2)overset(+)CH"(II), "(CH_(3))_(3)C^(+)"(III) "overset(+)CH_(3)"(

Last Answer : The stability order in the following carbocations, `CH_(3)CH_(2)^(+)"(I), "(CH_(3))_( ... B. `IgtIIgtIIIgtIV` C. `IIIgtIVgtIgtII` D. `IIIgtIIgtIgtIV`

Arrange the following carbocations in order of increasing stability : `{:(underset("(I)")((CH_(3))_(3)Coverset(+)CH_(2))", "underset("(II)")((CH_(3))_

Description : Arrange the following carbocations in order of increasing stability : `{:(underset("(I)")((CH_(3))_(3)Coverset(+)CH_(2))", "underset("(II)")((CH_(3))_

Last Answer : Arrange the following carbocations in order of increasing stability : `{:(underset("(I)")((CH_ ... ` C. `IltIIIltIVltII` D. `IIltIVltIII ltI`

Hyperconjugation is most useful for stabilizing which of the following carbocations?

Description : Hyperconjugation is most useful for stabilizing which of the following carbocations?

Last Answer : Hyperconjugation is most useful for stabilizing which of the following carbocations? A. Neopentyl B. tert-Butyl C. Isopropyl D. Ethyl

All the following correctly describe the intermediate 3-OH-3-methyl glutaryl CoA except (A) It is generated enzymatically in the mitochondrial matrix (B) It is formed in the cytoplasm (C) It inhibits the first step in cholesterol synthesis (D) It is involved in the synthesis of ketone bodies

Description : All the following correctly describe the intermediate 3-OH-3-methyl glutaryl CoA except (A) It is generated enzymatically in the mitochondrial matrix (B) It is formed in the cytoplasm (C) It inhibits the first step in cholesterol synthesis (D) It is involved in the synthesis of ketone bodies

Last Answer : Answer : C

4° F will be equivalent to (a) 77° X (b) 113.3° X (c) 128.6° X (d) 154.4° X

Description : 4° F will be equivalent to (a) 77° X (b) 113.3° X (c) 128.6° X (d) 154.4° X

Last Answer : Ans:(c)

If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array

Description : If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array

Last Answer : B. critical phased array

1 rad is equal to A. 57.3° B. 54° C. 45° D. 90°

Description : 1 rad is equal to A. 57.3° B. 54° C. 45° D. 90°

Last Answer : 57.3°

The slope correction may be ignored if (A) The slope of the ground is less than 3° (B) To slope of the ground is say 1 in 19 (C) Both (a) and (b) (D) Neither (a) nor (b)

Description : The slope correction may be ignored if  (A) The slope of the ground is less than 3°  (B) To slope of the ground is say 1 in 19  (C) Both (a) and (b)  (D) Neither (a) nor (b) 

Last Answer : (C) Both (a) and (b

The slope correction for a 3° slope for a length of 100 m, is (A) -0.11 m (B) -0.12 m (C) -1.87 m (D) -0.137 m

Description : The slope correction for a 3° slope for a length of 100 m, is  (A) -0.11 m  (B) -0.12 m  (C) -1.87 m  (D) -0.137 m

Last Answer : (D) -0.137 m

The reduced bearing of a line is N 87° W. Its whole circle bearing is (A) 87° (B) 273° (C) 93° (D) 3°

Description : The reduced bearing of a line is N 87° W. Its whole circle bearing is (A) 87° (B) 273° (C) 93° (D) 3°

Last Answer : (B) 273°

A member is balanced at its end by two inclined members carrying equal forces. For equilibrium the angle between the inclined bars must be (A) 3° (B) 45° (C) 90° (D) 120°

Description : A member is balanced at its end by two inclined members carrying equal forces. For equilibrium  the angle between the inclined bars must be  (A) 3°  (B) 45°  (C) 90°  (D) 120° 

Last Answer : (D) 120° 

An aircraft is travelling at 100kts forward speed on a 3° glidescope. What is its rate of descent? a. 500 ft/min b. 300 ft/min c. 250 ft/min d. 600 ft/min

Description : An aircraft is travelling at 100kts forward speed on a 3° glidescope. What is its rate of descent? a. 500 ft/min b. 300 ft/min c. 250 ft/min d. 600 ft/min

Last Answer : a. 500 ft/min

An aircraft is travelling at 100kts forward speed on a 3° glidescope. What is its rate of descent? a. 500 ft/min b. 300 ft/min c. 250 ft/min d. 600 ft/min

Description : An aircraft is travelling at 100kts forward speed on a 3° glidescope. What is its rate of descent? a. 500 ft/min b. 300 ft/min c. 250 ft/min d. 600 ft/min

Last Answer : a. 500 ft/min

In standard disc plow the tilk angel varies between: A.30-40 ° B.40-45° C.20-25° D.2-3°

Description : In standard disc plow the tilk angel varies between: A.30-40 ° B.40-45° C.20-25° D.2-3°

Last Answer : C.20-25°

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is (A) Correctly focussed (B) Not correctly focussed (C) Said to have parallax (D) Free from parallax

Description : While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is (A) Correctly focussed (B) Not correctly focussed (C) Said to have parallax (D) Free from parallax

Last Answer : (C) Said to have parallax

Woollen cloth protects the body from cold because – (1) it is a good conductor of heat (2) it is a poor conductor of heat (3) external heat rays enter into the body through the woollen cloth (4) it reflects heat

Description : Woollen cloth protects the body from cold because – (1) it is a good conductor of heat (2) it is a poor conductor of heat (3) external heat rays enter into the body through the woollen cloth (4) it reflects heat

Last Answer : (2) it is a poor conductor of heat Explanation: It is just because woolen clothes have fibres and between those fibres air is trapped which reduces heat loss. It reduces heat loss because it is an insulator or poor conductor of heat.

The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : (2) It reflects most of the heat from the sum Explanation: Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when ... on a spring day because of the sun's heat. It melts because of the warm air from the sea.