Resonance Effect

Q.

Resonance is not exhibited by................…?

1. Phenol

2. Aniline

3. Nitrobenzene

4. Cyclohexane

Q. The benzyl free radical is aromatic because it ha

Q. Which is incorrect? Conjugate acid of h2o is h30+ Conjugate base of hco3 - is co3 2- Conjugate base of NH3 is NH2- Conjugate base of HOCl is Cl-

Q. at room temp.F2 and Cl2 are gases br2 is liquid and I2 is solid.why?

Q.

Resonance hybrid is more stable than the resonating forms but the energy of the resonance hybrid is:

1. Does not depend upon the resonating forms

2. More than resonating forms

3. Equal to resonating forms

4. Less than resonating forms

Q. The resonating structures for $N_{2}O$ are given below :

Choose the correct decreasing order of stablity:

1. $\left(i\right)>\left(ii\right)>\left(iii\right)$
2. $\left(i\right)>\left(iii\right)>\left(ii\right)$
3. $\left(ii\right)>\left(iii\right)>\left(i\right)$
4. $\left(iii\right)>\left(ii\right)>\left(i\right)$

Q. Select the incorrect option from the following:

1. Resonating structures have a real existence
2. The actual structure lies between various possible resonating structures
3. Resonating structures are useful as they allow us to describe the molecule properties
4. None of the mentioned

Q. Why is the bond angle of NH3 greater than NF3 ?

Q.

Which of the following weak acids ionizes to give the strongest conjugate base?

1. HClO

2. CH₃COOH

3. HF

4. HNO₂

Q. how many resonating structures can be drawn for NO2?

Q. Compare inductive effect of carbon carbon single, double and triple Bond

Q. write the resonating structure of HCO2

Q.

$|C{H}_3-\stackrel{\oplus }{C}H-C{H}_3||C{H}_3-\stackrel{\oplus }{C}H-OC{H}_3|||C{H}_3-\stackrel{\oplus }{C}H-COC{H}_3$

1. I > II > III

2. II > III > I

3. III > I > II

4. II > I > III

Q.

The number of lone pairs of electrons on SF₄, CF₄ and XeF₄ are:

1. 2, 0 and 1 lone pairs of electrons respectively

2. 1, 1 and 1 lone pairs of electrons respectively

3. 0, 1 and 2 lone pairs of electrons respectively

4. 1, 0 and 2 lone pairs of electrons respectively

Q.

Trihalides are less covalent than pentahalides. Justify

Q.

A compound having molecular formula NH₂CH₂COOH is expected to behave

1. Only as acid

2. Neither acid nor base

3. Both acid and base

4. Only as base

Q.

All bonds in benzene are equal due to

1. Tautomerism

2. Inductive effect

3. Resonance

4. Isomerism

Q. why it is that more the number of important resonating structures more is the resonance energy?

Q. 3Br2 + 6NaOH → 5NaBr + NaBrO3 Find eq. wt. of NaOH.exp the highlighted part in the attac

Q. Which of the following groups does not exhibit +M effect when attached with benzene?

1. $Ph-N{H}_2$
2. $Ph-\stackrel{+}{N}{H}_3$
3. $Ph-OH$
4. $Ph-Cl$

Q. What is imaginary - Resonance structures or resonance hybrid? Why?

Q.

Among the following, the least stable resonance structure is:

1. 

2. 

3. 

4. 

Q. what is resonance? what is conjugation?

Q. 29.Why free radicals dont rearrange as three degree like neopentyl .

Q. write a brief note on RESONANCE

Q. 18. What is resonance and resonating structures?

Q.

Arrange the following compounds in order of decreasing acidity:

1. I > II > III > IV

2. III > I > II > IV

3. IV > III > I > II

4. II > IV > I > III

Q. How to calculate formal charge of an atom in short process ?

Q. Calculate the formal charge on S atom in most stable structure of SO_3

Q. can conjugation exist between lone pair/ negative charge and positive charge? Eg NH2-CH2+