(A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) `+I` effect of the three methyl groups in tertiary butyl carbanion tends to mak

(A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) `+I` effect of the three methyl groups in tertiary butyl carbanion tends to mak
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(A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) `+I` effect of the three methyl ... IF (A) is incorrect but (R) is correct.
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Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with (A) Methyl alcohol (B) Ethyl alcohol (C) Methane (D) Ethane

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Last Answer : (A) Methyl alcohol

Carbon atom in methyl carbocation and methyl carbanion is _____ and ______ hybridised :

Description : Carbon atom in methyl carbocation and methyl carbanion is _____ and ______ hybridised :

Last Answer : Carbon atom in methyl carbocation and methyl carbanion is _____ and ______ hybridised : A. `sp,sp^(2)` B. `sp^(3),sp ... 3),sp^(2)` D. `sp^(2),sp^(3)`

Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing HCl and a methyl radical. (c) forming a carbanion intermediate that rapidly dissociates to produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane

Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane

Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical

What is the name given for a species that contains a positively charged carbon atom? (a) carbanion (b) carbocation (c) methyl radical (d) free radical

Description : What is the name given for a species that contains a positively charged carbon atom? (a) carbanion (b) carbocation (c) methyl radical (d) free radical

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The most stable carbanion is :

Description : The most stable carbanion is :

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Tertiary butyl amine is a-

Description : Tertiary butyl amine is a-

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Tertiary butyl chloride preferably undergo hydrolysis by:

Description : Tertiary butyl chloride preferably undergo hydrolysis by:

Last Answer : Tertiary butyl chloride preferably undergo hydrolysis by: A. `S_(N^(1))` mechanism B. `S_(N^(2))` mechanism C. and of (a) and (b) D. none of these

When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed is

Description : When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed is

Last Answer : When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed is A. oxidation B. reduction C. dehydration D. substitution

When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed is

Description : When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed is

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Wood spirit is – (1) Methyl alcohol (2) Ethyl alcohol (3) Butyl alcohol (4) Propyl alcohol

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lodex, a pain relief balm, has the smell of _______. (1) Methyl salicylate (2) Ethyl salicylate (3) Propyl salicylate (4) Butyl salicylate

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Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the (A) Elimination of solvent drying facility (B) Higher nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

Description : Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent ... nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Which of the following mixtures does not form an azeotrope at atmospheric pressure? (A) Water-alcohol (B) Methyl alcohol-acetone (C) Butyl acetate-water (D) None of these

Description : Which of the following mixtures does not form an azeotrope at atmospheric pressure? (A) Water-alcohol (B) Methyl alcohol-acetone (C) Butyl acetate-water (D) None of these

Last Answer : (D) None of these

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

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

Last Answer : tert-Butyl chloride

. In industrial nomenclature, alcohol means (A) Butyl alcohol (B) Propyl alcoho(C) Ethanol(D) Methyl alcohol

Description : . In industrial nomenclature, alcohol means (A) Butyl alcohol (B) Propyl alcoho (C) Ethanol (D) Methyl alcohol

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The most suitable chemical which can be applied to the water surface for reducing evaporation is (A) Methyl alcohol (B) Ethyl alcohol (C) Cetyl alcohol (D) Butyl alcohol

Description : The most suitable chemical which can be applied to the water surface for reducing evaporation is (A) Methyl alcohol (B) Ethyl alcohol (C) Cetyl alcohol (D) Butyl alcohol

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Iodex, a pain relief balm, has the smell of __________ . (1) Methyl salicylate (2) Ethyl salicylate (3) Propyl salicylate (4) Butyl salicylate

Description : Iodex, a pain relief balm, has the smell of __________ . (1) Methyl salicylate (2) Ethyl salicylate (3) Propyl salicylate (4) Butyl salicylate

Last Answer : Methyl salicylate

Wood spirit is (1) Methyl alcohol (2) Ethyl alcohol (3) Butyl alcohol (4) Propyl alcohol

Description : Wood spirit is (1) Methyl alcohol (2) Ethyl alcohol (3) Butyl alcohol (4) Propyl alcohol

Last Answer : Methyl alcohol

Which type of plastics is used for mak- ing adhesives; button etc?

Description : Which type of plastics is used for mak- ing adhesives; button etc?

Last Answer : Urea formaldehyde

Which glass is generally used for mak- ing laboratory wires?

Description : Which glass is generally used for mak- ing laboratory wires?

Last Answer : Heat resistant glass

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.

Description : 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 ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.

Last Answer : a more stable carbonium ion is generated.

(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.

2-Methyl-2-butene reacts with HBr in the presence of peroxide to give (a) A primary alkyl bromide (b) A secondary alkyl bromide (c) A tertiary alkyl bromide (d) A vicinal dibromide

Description : 2-Methyl-2-butene reacts with HBr in the presence of peroxide to give (a) A primary alkyl bromide (b) A secondary alkyl bromide (c) A tertiary alkyl bromide (d) A vicinal dibromide

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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 pair of electrons in the given carbanion, `CH_(3)C-=C^(Theta)` is present in which of the following orbitals?

Description : The pair of electrons in the given carbanion, `CH_(3)C-=C^(Theta)` is present in which of the following orbitals?

Last Answer : The pair of electrons in the given carbanion, `CH_(3)C-=C^(Theta)` is present in which of the following orbitals? A. ... ` B. `sp^(2)` C. `2p` D. `sp`

The shape of carbanion, `[CH_(3)]^(-)` is :

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The number of electrons, present in the valence shell of carbon of carbanion bearing `-ve` charge, is:

Description : The number of electrons, present in the valence shell of carbon of carbanion bearing `-ve` charge, is:

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An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals

Description : An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals

Last Answer : Zwitterion

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

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

Last Answer : electrophile

Which statement is correct? (a) Energy is released when a bond breaks. (b) A sigma bond results from attraction of protons and electrons. (c) Energy is released when a bond forms. (d) A carbanion is positively charged

Description : Which statement is correct? (a) Energy is released when a bond breaks. (b) A sigma bond results from attraction of protons and electrons. (c) Energy is released when a bond forms. (d) A carbanion is positively charged

Last Answer : Energy is released when a bond forms

Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion

Description : Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion

Last Answer : Free radicals

Assertion (A): Formative evaluation tends to accelerate the pace of learning. Reason (R): As against summative evaluation, formative evaluation is highly reliable. Choose the correct Answer from the following code (A) Both (A) and (R) are true and (R) is the correct explanation of (A). (B) Both (A) and (R) are true, but (R) is not the correct explanation of (A). (C) (A) is true, but (R) is false. (D) (A) is false, but (R) is true

Description : Assertion (A): Formative evaluation tends to accelerate the pace of learning. Reason (R): As against summative evaluation, formative evaluation is highly reliable. Choose the correct Answer from the following code (A) Both (A) and ... ) is true, but (R) is false. (D) (A) is false, but (R) is true

Last Answer : Answer: C 

Assertion (A): Formal communication tends to be fast and flexible. Reason (R): Formal communication is a systematic and orderly flow of information. (A) (A) is false but, (R) is correct (B) Both (A) and (R) are correct and (R) is correct explanation of (A) (C) Both (A) and (R) are correct, but (R) is not correct explanation of (A) (D) (A) is correct but, (R) is false

Description : Assertion (A): Formal communication tends to be fast and flexible. Reason (R): Formal communication is a systematic and orderly flow of information. (A) (A) is false but, (R) is correct (B) Both (A) and ( ... correct, but (R) is not correct explanation of (A) (D) (A) is correct but, (R) is false

Last Answer : Answer: A

"When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change." This is called the (A) Le-Chatelier principle (B) Kopp's rule (C) Law of corresponding state (D) Arrhenius hypothesis

Description : "When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change." This is ... Chatelier principle (B) Kopp's rule (C) Law of corresponding state (D) Arrhenius hypothesis

Last Answer : (A) Le-Chatelier principle

The following is true of bezafibrate except: A. It activates lipoprotein lipase B. It mainly lowers serum triglyceride level with smaller effect on LDL cholesterol level C. It increases the incidence of myopathy due to statins D. It tends to lower plasma fibrinogen level

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Last Answer : C. It increases the incidence of myopathy due to statins

The methyl groups in the aromatic nucleus of a tocopherols are (A) 2 (B) 3 (C) 4 (D) 5

Description : The methyl groups in the aromatic nucleus of a tocopherols are (A) 2 (B) 3 (C) 4 (D) 5

Last Answer : Answer : B

Cholesterol is a (A) Animal sterol (B) M.F. C27 H46O (C) 5 methyl groups (D) All of these

Description : Cholesterol is a (A) Animal sterol (B) M.F. C27 H46O (C) 5 methyl groups (D) All of these

Last Answer : Answer : D

The two functional groups characteristic of sugars are (a) hydroxyl and methyl (b) carbonyl and methyl (c) carbonyl and phosphate (d) carbonyl and hydroxyl.

Description : The two functional groups characteristic of sugars are (a) hydroxyl and methyl (b) carbonyl and methyl (c) carbonyl and phosphate (d) carbonyl and hydroxyl.

Last Answer : (d) carbonyl and hydroxyl.

The two functional groups characteristic of sugars are (1) hydroxyl and methyl (2) carbonyl and methyl (3) carbonyl and phosphate (4) carbonyl and hydroxyl

Description : The two functional groups characteristic of sugars are (1) hydroxyl and methyl (2) carbonyl and methyl (3) carbonyl and phosphate (4) carbonyl and hydroxyl

Last Answer : (4) carbonyl and hydroxyl

Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta attachment of the electrophile. (c) the less stable resonance hybrid occurs with meta attachment of the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Description : Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta ... the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Last Answer : the more stable resonance hybrid occurs with meta attachment of the electrophile.

Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases. (a) Both A & R are true and R is the correct explanation of A (b) Both A & R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) Both A & R are false.

Description : Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases ... A. (c) A is true but R is false. (d) Both A & R are false.

Last Answer : (a) Both A & R are true and R is the correct explanation of A

What do ‘Cash Cows’ symbolize in The Boston Consulting Group's product portfolio matrix? a) Remain Invested b) Problem Child c) Stable Cash Flow d) Cash Traps

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Last Answer : c) Stable Cash Flow

What is the composition of zircon , monazite , butyl etc. ?

Description : What is the composition of zircon , monazite , butyl etc. ?

Last Answer : Black gold is made up of zircon , monazite , butyl etc.

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

The major product obtained when tert- butyl bromide is heated with sodium ethoxide is

Description : The major product obtained when tert- butyl bromide is heated with sodium ethoxide is

Last Answer : The major product obtained when tert- butyl bromide is heated with sodium ethoxide is A. 2- ... Ehene C. tert- Buty1methy1ether D. Diethyl ether

Which of the following alkenes when passed through conc. `H_(2)SO_(4)` followed by hydrolysis with boiling water would give tert-butyl alcohol

Description : Which of the following alkenes when passed through conc. `H_(2)SO_(4)` followed by hydrolysis with boiling water would give tert-butyl alcohol

Last Answer : Which of the following alkenes when passed through conc. `H_(2)SO_(4)` followed by hydrolysis with ... B. Isobutylene C. Propylene D. But-1-ene

Which of the following rubbers has the widest service temperature range (-75 to 275°C)? (A) Butyl rubber (B) Silicon rubber (C) Nitrile rubber (D) Silicone rubber

Description : Which of the following rubbers has the widest service temperature range (-75 to 275°C)? (A) Butyl rubber (B) Silicon rubber (C) Nitrile rubber (D) Silicone rubber

Last Answer : (D) Silicone rubber

__________ is produced by polymerisation of chloroprene. (A) Thiokol (a polysulphide rubber) (B) Butyl rubber (C) Neoprene (D) Polyurethane rubber

Description : __________ is produced by polymerisation of chloroprene. (A) Thiokol (a polysulphide rubber) (B) Butyl rubber (C) Neoprene (D) Polyurethane rubber

Last Answer : (C) Neoprene

Buna-N is also called (A) Butyl rubber (B) Nitrile rubber (C) Neoprene (D) Thiokol

Description : Buna-N is also called (A) Butyl rubber (B) Nitrile rubber (C) Neoprene (D) Thiokol

Last Answer : (B) Nitrile rubber

Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of(A) Cold SBR(B) Butyl rubber(C) Bunai N(D) Buna S

Description : Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of (A) Cold SBR (B) Butyl rubber (C) Bunai N (D) Buna S

Last Answer : (B) Butyl rubber