The least stable conformation of cyclohexane is

The least stable conformation of cyclohexane is
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The least stable conformation of cyclohexane is A. Boat B. Chair C. Twist boat D. Half chair
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The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Description : The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Last Answer : Chair form

In the following the most stable conformation of n-butane is :

Description : In the following the most stable conformation of n-butane is :

Last Answer : In the following the most stable conformation of n-butane is : A. B. C. D.

Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Description : Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Last Answer : cis-1,3-diethylcyclohexane

The most stable form of cis cyclohexane -1,3-diol is represented as :1

Description : The most stable form of cis cyclohexane -1,3-diol is represented as :1

Last Answer : The most stable form of cis cyclohexane -1,3-diol is represented as :1 A. B. C. D.

Chair form of cyclohexane is more stable than boat form because :

Description : Chair form of cyclohexane is more stable than boat form because :

Last Answer : Chair form of cyclohexane is more stable than boat form because : A. In chair form carbons are in staggered form ... ^(@)` and in boat form `111^(@)`

Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` bond in anticloclwise direction, the conformation formed is :

Description : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` bond in anticloclwise direction, the conformation formed is :

Last Answer : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` ... A. anti B. fully eclipsed C. gauche D. partially eclipsed

The true statement about the following conformation is :

Description : The true statement about the following conformation is :

Last Answer : The true statement about the following conformation is : A. It has maximum angle strain. B. It ... bonding. D. It has maximum Vander Waal strain.

The eclipsed and staggered conformation of ethane is due to -

Description : The eclipsed and staggered conformation of ethane is due to -

Last Answer : The eclipsed and staggered conformation of ethane is due to - A. Free rotation about C-C single bond ... rotation about C-C bond D. None of the above

1.The preferred conformation of cis-1,3-dimethylcyclohexane is:?

Description : 1.The preferred conformation of cis-1,3-dimethylcyclohexane is:?

Last Answer : 14

‘Lock’ and ‘Key’ model of enzyme action proposed by Fisher implies that (A) The active site is flexible and adjusts to substrate (B) The active site requires removal of PO4 group (C) The active site is complementary in shape to that of the substrate (D) Substrates change conformation prior to active site interaction

Description : Lock' and Key' model of enzyme action proposed by Fisher implies that (A) The active site is flexible and adjusts to substrate (B) The active site requires removal of PO4 group ( ... complementary in shape to that of the substrate (D) Substrates change conformation prior to active site interaction

Last Answer : Answer : C

An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation of the enzyme by binding to a site other than catalytic site (D) Changing the nature of the products formed

Description : An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation ... binding to a site other than catalytic site (D) Changing the nature of the products formed

Last Answer : Answer : C

Fischer’s ‘lock and key’ model of the enzyme action implies that (A) The active site is complementary in shape to that of substance only after interaction. (B) The active site is complementary in shape to that of substance (C) Substrates change conformation prior to active site interaction (D) The active site is flexible and adjusts to substrate

Description : Fischer's lock and key' model of the enzyme action implies that (A) The active site is complementary in shape to that of substance only after interaction. (B) The active site is ... change conformation prior to active site interaction (D) The active site is flexible and adjusts to substrate

Last Answer : Answer : B

Both α-helix and β-pleated sheet conformation of proteins were proposed by (A) Watson and Crick (B) Pauling and Corey (C) Waugh and King (D) Y.S.Rao

Description : Both α-helix and β-pleated sheet conformation of proteins were proposed by (A) Watson and Crick (B) Pauling and Corey (C) Waugh and King (D) Y.S.Rao

Last Answer : Answer : B

The α-Helix is held in a coiled conformation partially because of : (a) Optical activity (b) Hydrogen bonding (c) Resonance (d) Delocalization

Description : The α-Helix is held in a coiled conformation partially because of : (a) Optical activity (b) Hydrogen bonding (c) Resonance (d) Delocalization

Last Answer : Hydrogen bonding

Which of the following is the “quaternary structure” of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with respect to each other (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone

Description : Which of the following is the quaternary structure of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with ... (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone

Last Answer : description of the way the peptide chains are arranged with respect to each other

Which of the following may characterize the “secondary structure” of proteins? (a) conformation of the protein backbone (b) α-Helix (c) parallel β-pleated sheet (d) all of the above

Description : Which of the following may characterize the “secondary structure” of proteins? (a) conformation of the protein backbone (b) α-Helix (c) parallel β-pleated sheet (d) all of the above

Last Answer : all of the above

The eclipsed and staggered forms of ethane are said to differ in __________. (a) molecular formula (b) configuration (c) conformation (d) constitution

Description : The eclipsed and staggered forms of ethane are said to differ in __________. (a) molecular formula (b) configuration (c) conformation (d) constitution

Last Answer : conformation

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning (A) 1 : 1 : 2 (B) 1 : 2 : 4 (C) 1 : 3 : 6 (D) 1 : 4 : 10

Description : The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning (A) 1 : 1 : 2 (B) 1 : 2 : 4 (C) 1 : 3 : 6 (D) 1 : 4 : 10

Last Answer : Answer: Option D

Wool breed are judged 60% for their wool, and what percent for their conformation?

Description : Wool breed are judged 60% for their wool, and what percent for their conformation?

Last Answer : 40%

Which of the following is not phase of qualitative research? a. Orientation and overview b. Focused exploration c. Conformation and Closure d. Orientation and closure

Description : Which of the following is not phase of qualitative research? a. Orientation and overview b. Focused exploration c. Conformation and Closure d. Orientation and closure

Last Answer : a. Orientation and overview

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

The enthalpy of combustion of `H_(2)` , cyclohexene `(C_(6)H_(10))` and cyclohexane `(C_(6)H_(12))` are `-241` , `-3800` and `-3920KJ` per mol respect

Description : The enthalpy of combustion of `H_(2)` , cyclohexene `(C_(6)H_(10))` and cyclohexane `(C_(6)H_(12))` are `-241` , `-3800` and `-3920KJ` per mol respect

Last Answer : The enthalpy of combustion of `H_(2)` , cyclohexene `(C_(6)H_(10))` and cyclohexane `(C_(6)H_(12))` are `-241 ... "KJ mol"^(-1)` D. `242 "KJ mol^(-1)`

Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Description : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Last Answer : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. ... 3a (vi) 1e, 4a (vii) 1a, 3a

Will cyclohexane undergoes combustion?

Description : Will cyclohexane undergoes combustion?

Last Answer : Any organic compound burn.

Is 2-butanone soluble in cyclohexane?

Description : Is 2-butanone soluble in cyclohexane?

Last Answer : Yes, it is soluble.

The starting material used for the manufacture of caprolactam is (A) Ethyl benzene (B) Cyclohexane (C) Ethylene glycol (D) DMT

Description : The starting material used for the manufacture of caprolactam is (A) Ethyl benzene (B) Cyclohexane (C) Ethylene glycol (D) DMT

Last Answer : (B) Cyclohexane

Which of the following is a Naphthene? (A) Butene (B) Butadiene (C) Cyclohexane (D) Acetylene

Description : Which of the following is a Naphthene? (A) Butene (B) Butadiene (C) Cyclohexane (D) Acetylene

Last Answer : (C) Cyclohexan

A binary mixture of benzene and cyclohexane is separated by (A) Flash vaporisation (B) Extractive distillation (C) Solvent extraction (D) Ordinary distillation

Description : A binary mixture of benzene and cyclohexane is separated by (A) Flash vaporisation (B) Extractive distillation (C) Solvent extraction (D) Ordinary distillation

Last Answer : (B) Extractive distillation

Cyclohexane does not belong to aromatic class even though it has a ring structure. How do you justify this?

Description : Cyclohexane does not belong to aromatic class even though it has a ring structure. How do you justify this?

Last Answer : Cyclohexane is a saturated hydrocarbon in which the carbon atoms are joined by single covalent bonds to form a ring where as in aromatic hydrocarbons have alternate single and double bonds. Hence Cyclohexane is does not belong to aromatic class.

Resorcinol on distillation with zinc dust gives (a) Benzene (b) Cyclohexane (c) Toluene (d) m-Xylene

Description : Resorcinol on distillation with zinc dust gives (a) Benzene (b) Cyclohexane (c) Toluene (d) m-Xylene

Last Answer : Benzene

Benzene reacts with H2 at 150°C at 30 atm in the presence of Ni catalyst to give (a) Cyclohexane (b) Cyclohexene (c) n-Hexane (d) No reaction occurs

Description : Benzene reacts with H2 at 150°C at 30 atm in the presence of Ni catalyst to give (a) Cyclohexane (b) Cyclohexene (c) n-Hexane (d) No reaction occurs

Last Answer : Cyclohexane

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

Which of the following statements are false about benzene? (a) It is a planar molecule with bond angles 120°(b) It is immiscible with water forming the lower layer. (c) It can be converted into cyclohexane by hydrogenation at 200°C in the presence of Ni catalyst. (d) It reacts with ethyl chloride in the presence of aluminium chloride to form ethylbenzene..

Description : Which of the following statements are false about benzene? (a) It is a planar molecule with bond angles 120°. (b) It is immiscible with water forming the lower layer. (c) It can be ... Ni catalyst. (d) It reacts with ethyl chloride in the presence of aluminium chloride to form ethylbenzene.

Last Answer : It is immiscible with water forming the lower layer

What percentage of cyclohexane molecule is estimated to be in the boat form at any given time?(a) over 99% (b) between 90% and 99% (c) approximately 50% (d) less than 1%

Description : What percentage of cyclohexane molecule is estimated to be in the boat form at any given time? (a) over 99% (b) between 90% and 99% (c) approximately 50% (d) less than 1%

Last Answer : less than 1%

Which of the following statements is false about cyclohexane? (a) It is a saturated cyclic hydrocarbon (b) All C–C–C bond angles are 109°28' (c) It is very unstable, strained compound. (d) It can exist in two conformations which are designated as the boat-form and the chair-form

Description : Which of the following statements is false about cyclohexane? (a) It is a saturated cyclic hydrocarbon (b) All C–C–C bond angles are 109°28' (c) It is very unstable, strained compound. (d) It can exist in two conformations which are designated as the boat-form and the chair-form

Last Answer : It is very unstable, strained compound

The bond angle between carbon atoms in cyclohexane is (a) 60° (b) 90° (c) 109.5° (d) 120°

Description : The bond angle between carbon atoms in cyclohexane is (a) 60° (b) 90° (c) 109.5° (d) 120°

Last Answer : 109.5°

The bond angle between carbon atoms in cyclohexane is (a) 109°28' (b) 60° (c) 90° (d) 120°

Description : The bond angle between carbon atoms in cyclohexane is (a) 109°28' (b) 60° (c) 90° (d) 120°

Last Answer : 109°28'

Which of the following molecules will decolorize bromine in carbon tetrachloride most readily? (a) 1,2-Dimethylcyclopropane (b) Cyclopentane (c) 1,2-Dimethylcyclobutane (d) Cyclohexane

Description : Which of the following molecules will decolorize bromine in carbon tetrachloride most readily? (a) 1,2-Dimethylcyclopropane (b) Cyclopentane (c) 1,2-Dimethylcyclobutane (d) Cyclohexane

Last Answer : 1,2-Dimethylcyclopropane

Which of the following compounds will react most readily with concentrated sulfuric acid? (a) Ethane (b) Cyclohexane (c) Propane (d) Cyclohexene

Description : Which of the following compounds will react most readily with concentrated sulfuric acid? (a) Ethane (b) Cyclohexane (c) Propane (d) Cyclohexene

Last Answer : Cyclohexene

Which of the following cycloalkanes is most reactive? (a) Cyclopropane (b) Cyclohexane (c) Cyclobutane (d) Cycloheptane

Description : Which of the following cycloalkanes is most reactive? (a) Cyclopropane (b) Cyclohexane (c) Cyclobutane (d) Cycloheptane

Last Answer : Cyclopropane

Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < cyclopentane < cyclobutane < cyclopropane (c) cyclopentane < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane

Description : Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < ... < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane

Last Answer : cyclohexane < cyclopentane < cyclobutane < cyclopropane

The 1936 Nobel Prize in chemistry was awarded to Peter J.W. Debye for his studies of: w) kinetic energy of colliding particles x) electron configuration y) dipole moments z) conformations of cyclohexane

Description : The 1936 Nobel Prize in chemistry was awarded to Peter J.W. Debye for his studies of: w) kinetic energy of colliding particles x) electron configuration y) dipole moments z) conformations of cyclohexane

Last Answer : ANSWER: Y -- DIPOLE MOMENTS

Which of the following value of `DeltaH_(f)^(@)` represent that the product is least stable ?

Description : Which of the following value of `DeltaH_(f)^(@)` represent that the product is least stable ?

Last Answer : Which of the following value of `DeltaH_(f)^(@)` represent that the product is least stable ? A. `-94` K cal B. ... C. `+21.4` K cal D. `+64.8` K cal

The least stable metal cabonyl as per the bonding considerations should be

Description : The least stable metal cabonyl as per the bonding considerations should be

Last Answer : The least stable metal cabonyl as per the bonding considerations should be A. `Cr(CO)_(6)` B. `Mn(CO)_(6)` C. `Fe(CO)_(5)` D. `Ni(CO)_(4)`.

Which of the following is least stable ?

Description : Which of the following is least stable ?

Last Answer : Which of the following is least stable ? A. B. C. `HC-= overset(-)(C )` D.

Which one of the following carbanions is the least stable?

Description : Which one of the following carbanions is the least stable?

Last Answer : Which one of the following carbanions is the least stable? A. `CH_(3)CH_(2)^(-)` B. `HC-=C^(-)` C. `CH_(3)^(-)` D. `(CH_(3))_(3)barC`

Among the following, the least stable resonance structure is :

Description : Among the following, the least stable resonance structure is :

Last Answer : Among the following, the least stable resonance structure is : A. B. C. D.

The least stable particle?

Description : The least stable particle?

Last Answer : Neutron