Hyperconjugation
Trending Questions
Q. why enthalpy of formation of fluorides becomes less negative as we go down the group in alkali meta
Q. 34 Propene to propyne
Q. Which statement is correct for inductive effect
All are correct
It is a permanent effect.
It is the property of single bond.
It causes permanent polarisation in the molecule
Q. 37. Calculate percentage of carbon in ethanol??
Q. Hyperconjugation is possible in:
- None of these
Q. 18. Liquid benzene (C6H6)burns in oxygen according to 2C6H6(I)+15O2---->12CO2 (g)+6H2O (g) How many litres of O2 at STP are needed to complete of 39g of liquid benzene?
Q. Which one of the following is known as σ−π resonance?
- Resonance effect
- Hyperconjugation
- Inductive effect
- Electromeric effect
Q. . Which of the following is the most reactive towards electrophilic substitution reaction? ( 1)toluene ( 2) 1-ethyl benzene
Q. Which of the following is the most reactive towards electrophilic substitution reaction ethyl benzene or C6H5C(CH3)
Q.
The bond in the formation of fluorine molecule will be
Due to s-s overlapping
Due to s-p overlapping
Due to p-p overlapping
Due to hybridization
Q. 9. When a certain volume V ml of a gaseous hydrocarbon is exploded with excess of oxygen and the products cooled to room temperature, the observed contraction in volume was 1.5V ml. A further contraction of 2V ml was observed on exposure of the product Gases to alkali. Formula hydrocarbon is?
Q. 31. Which of the following organic compounds has same hybridization as its combustion products 1.Ethane 2.Ethyne 3.Ethene 4.Ethanol
Q. Anilinium ion resonance
Q. 49. 11.2 litre of a hydrocarbon at STP produces 44.8 litre of CO_2 at STP and 36 gm of H_2O duringits combustion. Calculate the moleculer formula of hydrocarbon
Q. The conversion of ortho hydrogen to para hydrogen is a difficult process (taking into account the extensive cooling).What is the real use of para hydrogen ? What is the need of isolating them if they have exactly same chemical properties?
Q. 79 The most stable alkene is (1) CH2 double bond CH-CH2-CH3 (2) CH2 double bond C(CH3)- CH double bond CH2 (3) CH2 double bond CH-CH double bond CH2 (4) CH3-CH double bond CH-CH3
Q. Ethyl group (−CH2CH3) in ethylbenzene increases electron density at which of the following positions?
- Meta only.
- Ortho, Meta and Para.
- Ortho-Para .
- Ortho-Meta .
Q. Which of the following is true regarding Bredt's rule ?
- A double bond cannot be formed at the bridgehead
- Double bonds can only be formed at the bridgehead
- Double bonds cannot be formed in the molecules having a bridgehead
- None of the above
Q. Why does having 8 electrons in the outermost shell of an atom provide most stability
Or
Is there any scientific basis or reason behind the octet rule?
Q. can ortho, para directing groups can have double bonds?
Q. A gaseous hydrocarbon gives upon combustion, 0.72 g water and 3.08 g of CO2. The empirical formula of the hydrocarbon is:
Q. Orbital interaction between the sigma bond of a substituent group and a neighbouring pi orbital is known as
- Hyperconjugation
- Inductive effect
- Steric effect
- Electric quadruple interactions
Q. In which of the following molecules all the atoms follow octet rule?
Q. Which of the following carbocation is the least stable?
Q. Which of the following molecules will show both hyperconjugation and mesomeric effect?
- CH3Cl
- CH3−CH=CH2
- CH3−CH=CH−C||O−CH3
- CH2=CH−CH=CH2
Q. How to find bond order c-c in benzene?
Q. Decreasing order of stability of C=C bond in the following compound is:
- p > q > r
- r > q > p
- p > r > q
- q > r > p
Q. 31. How many number of atoms in 10ml of ammonia?
Q.
Draw diagrams showing the formation of a double bond and a triple bond between carbon atoms in C2H4 and C2H2 molecules.