Conformational Isomerism
Trending Questions
Q.
What is the bond length of C - C bond in Benzene?
139 pm
128 pm
109 pm
154 pm
Q. Towards catayltic hydrogenation, the least reactive compound is 1) CH2=CH2 2)CH3-CH=CH2 3)H3C-CH=CH-CH3 4)(CH3)2 C=C(CH3)2
Q. 32. Which sequence correctly describes relative bond strength of oxygen molecule, superoxide ion and peroxideion?(4) O2 02022-022022-(1) 02(2)(3) kindly explain briefly why option 1 is incorrecet
Q. Total geometrical, structural and optical isomers of C4H11N will be?(Also give structures)
Q. how many benzinoid isomers are possible for C7H8o
Q. 8. The arrangment of (cH3)3C- , (CH3)2CH- , CH3CH2- When attached to benzene or an unsaturated group in increasing order of effect is (a)(CH3)3C- < (CH3)2CH-
Q.
The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)
2
4
3
5
Q.
Geometrical isomerism is a type of:
Stereoisomerism
Both Structural isomerism and Stereoisomerism
None of the these
Structural isomerism
Q. Why is it possible for conformers to interconvert at room temperature?
- Because there is no energy difference between different conformer states.
- Energy available at room temperature is sufficient.
- Conformers are usually found only at high temperatures.
- Conformers don't actually exist. They are a theoretical concept.
Q. Which one of the following isomeric structures has the lowest energy?
- None of the above
Q. Why hyperconjugation is known as no bond resonance?
Q. How to calculate the hybridization of ethane with H=½\lbrack V+M-C+A\rbrack
Q. Conformational isomers are due to :
- Free rotation about C-C single bond
- Free rotation about C-H single bond
- Frozen rotation about C-C double bond
- Restricted rotation about C-C single bond
Q. the no. of Carbin atoms present at lattice points and voids per unit cell of diamond respectivel
Q. Boat from of cyclohexane is less stable than chair form because:
- it floats on water
- of interaction of flag pole hydrogens on top of carbon
- eclipsed C−H bonds
- of high dipole moment
Q. 60. What is twistane
Q. Conformational isomerism can be exhibited by which of the following compounds?
- Methane at room temperature
- Cyclohexane at /(-100^oC/)
- Ethane at room temperature
- Benzene at /(100^oC/)
Q. 8) Energy required to dissociate 4g of gaseous hydrogen into free gaseous atoms is 208kcal at 25degCthe bond energy of H--H bond will be?
Q. Conformational isomerism are isomers that can be interconverted just by rotations about triple bonds.
- False
- True
Q. how many litres of oxygen at STP is required to burn 60 g of C2H6 ?
Q. In the following skew conformation of ethane, H′−C−C−H′′ dihedral angle is
- 58o
- 149o
- 151o
- 120o
Q.
Which of the following is true for conformational isomerism?
It is exhibited by the isomers that can be inter converted through rotations about formally single bonds.
Rotations are possible about double bonds also.
Rotations are possible about tirple bonds also
None of these.
Q.
The most stable conformation of ethane is
Staggered
Eclipsed
Neither a nor b
Both a and b