Which of the following is correct for stability of phenoxide ion?

Which of the following is correct for stability of phenoxide ion?
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Which of the following is correct for stability of phenoxide ion? A. Resonating structure of benzene ring ... in phenoxide ion D. All of the above
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On bromination, the electron rich phenoxide ion will be attacked most readily

Description : On bromination, the electron rich phenoxide ion will be attacked most readily

Last Answer : On bromination, the electron rich phenoxide ion will be attacked most readily A. on the negatively ... carbon atom D. on the ortho carbon atom.

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

Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`

Description : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`

Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C` A. B. C. D.

Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`

Description : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`

Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a ... B. salicyladehyde C. sodium benzoate D. sodium salicylate

Which one is formed when sodium phenoxide is heated with ethyl iodide?

Description : Which one is formed when sodium phenoxide is heated with ethyl iodide?

Last Answer : Which one is formed when sodium phenoxide is heated with ethyl iodide? A. Phenetole B. Ethyl phenyl alcohol C. Phenone D. None of these

Sodium benzoate on heating with soda-lime gives : (a) Sodium phenoxide (b) Benzene (c) Benzaldehyde (d) Benzophenone

Description : Sodium benzoate on heating with soda-lime gives : (a) Sodium phenoxide (b) Benzene (c) Benzaldehyde (d) Benzophenone

Last Answer : Benzene

Sodium phenoxide reacts with CO2 at 125°C under 5 atm pressure to give salicylic acid. This reaction is called (a) Kolbe's reaction (b) Perkin reaction (c) Wurtz reaction (d) HVZ reaction

Description : Sodium phenoxide reacts with CO2 at 125°C under 5 atm pressure to give salicylic acid. This reaction is called (a) Kolbe's reaction (b) Perkin reaction (c) Wurtz reaction (d) HVZ reaction

Last Answer : Kolbe's reaction

Which of the following factors does tends to increase the stability of metal ion complexes ?

Description : Which of the following factors does tends to increase the stability of metal ion complexes ?

Last Answer : Which of the following factors does tends to increase the stability of metal ion complexes ? A. ... metal ion D. Lower basicity of the ligands.

The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the (A) Bacterial stability factor (B) Relative stability (C) Biological oxygen demand (BOD) (D) Oxygen ion concentration

Description : The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the (A) Bacterial stability factor (B) Relative stability (C) Biological oxygen demand (BOD) (D) Oxygen ion concentration

Last Answer : (B) Relative stability

The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl oxygen (c) the acidity of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

Last Answer : the resonance stability associated with the carboxylate ion

Consider the following carbanions : Correct decreasing order of stability is :

Description : Consider the following carbanions : Correct decreasing order of stability is :

Last Answer : Consider the following carbanions : Correct decreasing order of stability is : A. `II gt III gt IV gt I` B. ` ... gt III` D. `I gt II gt III gt IV`

Arrange the following in correct order of their stability ? `(I) CH-=overset(Theta)C " "(II) CH_(2)=overset(Theta)CH " "(III) CH_(3)-overset(Theta)CH_

Description : Arrange the following in correct order of their stability ? `(I) CH-=overset(Theta)C " "(II) CH_(2)=overset(Theta)CH " "(III) CH_(3)-overset(Theta)CH_

Last Answer : Arrange the following in correct order of their stability ? `(I) CH-=overset(Theta)C " "(II) CH_(2)=overset( ... gt III gt I` D. `II gt I gt III`

Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

Description : Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

Last Answer : Choose the correct reason(s) for the stability of the lyophobic colloidal particles. A. ... layer of opposite charges around the colloidal particles.

Among the following number of correct statements are : (i) Stability of lyophilic colloids is mainly due to the strong interaction between dispersed p

Description : Among the following number of correct statements are : (i) Stability of lyophilic colloids is mainly due to the strong interaction between dispersed p

Last Answer : Among the following number of correct statements are : (i) Stability of lyophilic colloids is ... solution is lesser than that of dispersion medium.

Consider the following carbanions: Correct decreasing order of stability is :

Description : Consider the following carbanions: Correct decreasing order of stability is :

Last Answer : Consider the following carbanions: Correct decreasing order of stability is : A. II gt III gt I gt IV B. III ... II gt III D. I gt II gt III gt IV

Consider the following carbanions: Correct decreasing order of stability is :

Description : Consider the following carbanions: Correct decreasing order of stability is :

Last Answer : Consider the following carbanions: Correct decreasing order of stability is : A. II gt III gt I gt IV B. III ... II gt III D. I gt II gt III gt IV

The correct order of the thermal stability of hydrogen halides `(H-X)` is

Description : The correct order of the thermal stability of hydrogen halides `(H-X)` is

Last Answer : The correct order of the thermal stability of hydrogen halides `(H-X)` is A. (1) HI gt HBrgt HCI gt HF B. ... HBr lt HI D. (4)Hl gt HCI lt HF lt HBr

The correct stability order for the following speceis is :

Description : The correct stability order for the following speceis is :

Last Answer : The correct stability order for the following speceis is : A. II gt IV gt I gt III B. I gt II gt III gt ... I gt IV gt III D. I gt III gt II gt IV

What is the correct order of decreasing stability of the following cations ? `overset(oplus)underset(CH_(3)-CH-CH_(3)` II `overset(oplus)underset(CH_(

Description : What is the correct order of decreasing stability of the following cations ? `overset(oplus)underset(CH_(3)-CH-CH_(3)` II `overset(oplus)underset(CH_(

Last Answer : What is the correct order of decreasing stability of the following cations ? `overset(oplus)underset(CH_(3)-CH-CH_( ... gt I gt III D. II gt III gt I

Which of the following orders regarding relative stability of free radicals is correct?

Description : Which of the following orders regarding relative stability of free radicals is correct?

Last Answer : Which of the following orders regarding relative stability of free radicals is correct? A. `3^(@)lt2^(@)lt1^(@)` B. ... (@)` D. `3^(@)gt2^(@)lt1^(@)`

Which one is the correct order of decreasing stability of car banions?

Description : Which one is the correct order of decreasing stability of car banions?

Last Answer : Which one is the correct order of decreasing stability of car banions? A. `PgtSgtTgtC_(6)H_(5)CH_(2)` B. ` ... CH_(2)` D. `C_(6)H_(5)CH_(2)gtTgtSgtP`

The correct order of decreasing stability of hexafluorides of group 16 members is:

Description : The correct order of decreasing stability of hexafluorides of group 16 members is:

Last Answer : The correct order of decreasing stability of hexafluorides of group 16 members is: A. `TeF_(6) gt SeF_(6) gt SF_ ... D. `TeF_(6) gt SF_(6) gt SeF_(6)`

In the context of India, which one of the following is the correct relationship between Rights and Duties? (1) Rights are correlative with Duties. (2) Rights are personal and hence independent of society and Duties. (3) Rights, not Duties, are important for the advancement of the personality of the citizen. (4) Duties, not Rights, are important for the stability of the State.

Description : In the context of India, which one of the following is the correct relationship between Rights and Duties? (1) Rights are correlative with Duties. (2) Rights are personal and hence independent of society ... of the citizen. (4) Duties, not Rights, are important for the stability of the State.

Last Answer : (1) Rights are correlative with Duties. Explanation: Rights and duties are correlative and inseparable, hence A is the answer.

Select the correct statement. (A) A uniform soil has more strength and stability than a nonuniform soil (B) A uniform soil has less strength and stability than a nonuniform soil (C) Uniformity coefficient does not affect strength and stability (D) Uniformity coefficient of a poorly graded soil is more than that of a well graded soil

Description : Select the correct statement. (A) A uniform soil has more strength and stability than a nonuniform soil (B) A uniform soil has less strength and stability than a nonuniform soil (C) Uniformity ... (D) Uniformity coefficient of a poorly graded soil is more than that of a well graded soil

Last Answer : Answer: Option B

The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. (A) The bodies A and B have equal stability (B) The body A is more stable than body B (C) The body B is more stable than body A (D) The bodies A and B are unstable

Description : The Metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement. (A) The bodies A and B have equal stability (B) The body A is more stable than body B (C) The body B is more stable than body A (D) The bodies A and B are unstable

Last Answer : Answer: Option C

Which one of following statement about Overdenture is not correct: A. Greater occlusal loads can be applied by the patient B. Retention and stability are generally better than with conventional complete denture C. Alveolar bone resorption is reduced D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

Description : Which one of following statement about Overdenture is not correct: A. Greater occlusal loads can be applied by the patient B. Retention and stability are generally better than with ... The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

Last Answer : D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

Dividend policy of a company mainly concern with (i) dividend payout and (ii) Stability of dividend A. Only (i) is correct B. Only (ii) is correct C. Both (i) and (ii) are correct. D. Both (i) and (ii) are incorrect.

Description : Dividend policy of a company mainly concern with (i) dividend payout and (ii) Stability of dividend A. Only (i) is correct B. Only (ii) is correct C. Both (i) and (ii) are correct. D. Both (i) and (ii) are incorrect.

Last Answer : C. Both (i) and (ii) are correct.

The affective objective of seminar is Options: A) To incorporate the qualities of patience and tolerance in the researcher B) To appreciate the research inferences C) To incorporate emotional stability and motivation in the researcher D) All of the above statements are correct

Description : The affective objective of seminar is Options: A) To incorporate the qualities of patience and tolerance in the researcher B) To appreciate the research inferences C) To incorporate emotional stability and motivation in the researcher D) All of the above statements are correct

Last Answer : D) All of the above statements are correct 

The plume rise in a coal based power plant depends on: (i) Buoyancy (ii) Atmospheric stability (iii) Momentum of exhaust gases Identify the correct code (A) (i) and (ii) only (B) (ii) and (iii) only (C) (i) and (iii) only (D) (i), (ii) and (iii)

Description : The plume rise in a coal based power plant depends on: (i) Buoyancy (ii) Atmospheric stability (iii) Momentum of exhaust gases Identify the correct code (A) (i) and (ii) only (B) (ii) and (iii) only (C) (i) and (iii) only (D) (i), (ii) and (iii)

Last Answer : (B) (ii) and (iii) only

The correct sequence of steps required to improve system stability is

Description : The correct sequence of steps required to improve system stability is  (A) Insert derivative action, use negative feedback, reduce gain (B) Reduce gain, use negative feedback, insert ... derivative action, use negative feedback (D) Use negative feedback, reduce gain, insert derivative action

Last Answer : The correct sequence of steps required to improve system stability is  (A) Insert derivative action, use negative feedback, reduce gain (B) Reduce gain, use negative feedback, insert ... derivative action, use negative feedback (D) Use negative feedback, reduce gain, insert derivative action

The correct sequence of steps needed to improve system stability is

Description : The correct sequence of steps needed to improve system stability is (a) Insert derivation action, Use negative feedback and Reduce gain (b) Reduce gain, Use negative feedback and Insert ... action and Use negative feedback (d) Use negative feedback, Reduce gain and Insert derivation action

Last Answer : The correct sequence of steps needed to improve system stability is Use negative feedback, Reduce gain and Insert derivation action

The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:

Description : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:

Last Answer : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are: A. B. C. D.

Consider the follwing complexes ion `P,Q` and `R` `P =[FeF_(6)]^(3-), Q=[V(H_(2)O)_(6)]^(2+)` and `R=[Fe(H_(2)O)_(6)]^(2+)` The correct order of the c

Description : Consider the follwing complexes ion `P,Q` and `R` `P =[FeF_(6)]^(3-), Q=[V(H_(2)O)_(6)]^(2+)` and `R=[Fe(H_(2)O)_(6)]^(2+)` The correct order of the c

Last Answer : Consider the follwing complexes ion `P,Q` and `R` `P =[FeF_(6)]^(3-), Q=[V(H_(2)O)_(6)]^(2+)` and `R=[Fe( ... lt P` C. `R lt P lt Q` D. `Q lt P lt R`

Which of the following statements are correct for `SO_(4)^(2-)` ion.

Description : Which of the following statements are correct for `SO_(4)^(2-)` ion.

Last Answer : Which of the following statements are correct for `SO_(4)^(2-)` ion. A. It is tetrahedral B. All the ... the bond order `1.5` D. It is square planar

Which of the following statements is not correct? (a) An action potential in an axon does not move backward because the segment behind is in a refractory phase. (b) Depolarisation of hair cells of cochlea results in the opening of the mechanically gated potassium-ion channels. (c) Rods are very sensitive and contribute to daylight vision. (d) In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.

Description : Which of the following statements is not correct? (a) An action potential in an axon does not move backward because the segment behind is in a refractory phase. (b) Depolarisation of hair cells ... d) In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.

Last Answer : (c) Rods are very sensitive and contribute to daylight vision.

Consider the following statements. (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option. (a) (A) is false but (B) is true. (b) Both (A) and (B) are true. (c) (A) is true but (B) is false. (d) Both (A) and (B) are false

Description : Consider the following statements. (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the ... ) (A) is true but (B) is false. (d) Both (A) and (B) are false

Last Answer : (d) Both (A) and (B) are false.

Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.

Description : Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.

Last Answer : An alkyl group substitutes for a hydrogen

Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be removed by ion-exchange method. Which of these statements are correct? (a) 1, 2 & 3 only (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Description : Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be ... (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Last Answer : (a) 1, 2 & 3 only

The following is true of 'new formula' WHO-ORS: A. It has Na+ ion concentration of 75 mM/L B. Its glucose concentration is 75 mM/L C. Its total osmolarity is 245 mOsm/L D. All of the above are correct

Description : The following is true of 'new formula' WHO-ORS: A. It has Na+ ion concentration of 75 mM/L B. Its glucose concentration is 75 mM/L C. Its total osmolarity is 245 mOsm/L D. All of the above are correct

Last Answer : D. All of the above are correct

The 'new formula' WHO-ORS differs from the older 'standard formula' WHO-ORS in the following respect(s): A. It has lower Na+ ion and glucose concentration B. It has higher K+ ion concentration C. It has no basic salt D. Both 'B' and 'C' are correct

Description : The 'new formula' WHO-ORS differs from the older 'standard formula' WHO-ORS in the following respect(s): A. It has lower Na+ ion and glucose concentration B. It has higher K+ ion concentration C. It has no basic salt D. Both 'B' and 'C' are correct

Last Answer : A. It has lower Na+ ion and glucose concentration

hat is/are the consequence(s) of myocardial Na+ K+ ATPase inhibition by digoxin: A. Increased intracellular Na+ ion concentration B. Increased cytosolic Ca2+ ion concentration C. Increased intracellular K+ ion concentration D. Both ‘A’ and ‘B’ are correct

Description : hat is/are the consequence(s) of myocardial Na+ K+ ATPase inhibition by digoxin: A. Increased intracellular Na+ ion concentration B. Increased cytosolic Ca2+ ion concentration C. Increased intracellular K+ ion concentration D. Both ‘A’ and ‘B’ are correct

Last Answer : D. Both ‘A’ and ‘B’ are correct

Which one of the following statements about the mass spectrum of CH3Br is correct? a. the last two peaks are of equal size and occur at m/z values of 94 and 96 b. the last two peaks have abundances in the ratio 3:1 and occur at m/z values of 94 and 96 c. there is just one peak for the molecular ion with an m/z value of 95 d. there is just one peak for the molecular ion with an m/z value of 44

Description : Which one of the following statements about the mass spectrum of CH3Br is correct? a. the last two peaks are of equal size and occur at m/z values of 94 and 96 b. the last two peaks have abundances in the ... m/z value of 95 d. there is just one peak for the molecular ion with an m/z value of 44

Last Answer : a. the last two peaks are of equal size and occur at m/z values of 94 and 96