Aromatic Compounds

Q. Which of the following statement(s) is correct regarding quasi-aromatic compounds?

1. Have low dipole moment
2. Have high melting point and boiling point
3. Crystalline in nature.
4. Insoluble in polar solvent.

Q. Ordinarily the barrier to rotation about a carbon-carbon double bond is quite high but in compound P double bond between two rings was observed by NMR to have a rotational energy barrier of only about 20 cal/mol, showing that it has lot of single bond character.
The reason for this is

1. Double bond having partial triple bond character because of resonance
2. Double bond undergo flipping
3. Double bond is having high single bond character because of aromaticity gained in both three and five membered rings.
4. +I effect of $n{C}_3{H}_7$ groups makes double bond having partial single bond character.

Q. Select the correct statement regarding the following compounds:

1. II has a greater dipole moment than I
2. Covalent character of II is less than I
3. I is more soluble than II in polar solvents
4. None of these

Q. Cyclobutadiene is said to be:

1. Aromatic
2. Aliphatic
3. Anti-aromatic
4. None of the above

Q. Which of the following compound(s) are stable in their ionic structure?

1. 
2. 
3. 
4. 

Q. Which of the following compounds is aromatic?

1. 
2. 
3. 
4. 

Q.
The given compound is:

1. Aromatic
2. Non-aromatic
3. Anti-aromatic
4. None of the above

Q. Which of the following is a non-aromatic compound?

1. 
2. 
3. 
4. 

Q. Which of the following compound is aromatic?

1. 
2. 
3. 
4. 

Q. Which of the following compound is expected to be aromatic?

1. 
2. 
3. 
4. 

Q. Which of the following is aromatic in nature?

1. 
2. 
3. 
4. All of these

Q. Which of the following compounds is aromatic?

1. 
2. 
3. 
4. 

Q. Assertion: Tropylium cation is aromatic in nature.
Reason: The only property that determines its aromatic behavior is its planar structure.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion is incorrect and Reason is correct.

Q. Decreasing order of acidic strength of the following compounds is :

1. $\left(z\right)>\left(y\right)>\left(x\right)$
2. $\left(y\right)>\left(z\right)>\left(x\right)$
3. $\left(z\right)>\left(x\right)>\left(y\right)$
4. $\left(x\right)>\left(z\right)>\left(y\right)$

Q. The most stable and the least stable resonating structures are respectively

1. I and II
2. I and III
3. II and III
4. III and II

Q. Which of the following compound is non aromatic:

1. 
2. 
3. 
4. 

Q. Aromatic compounds:

1. Contain (4n + 4) $\pi$-electrons
2. contain (4n + 2) $\pi$-electrons
3. $C_n{H}_{2n-2}$ general formula
4. Highly reactive

Q.

Among the following, the number of aromatic compound(s) is

1. 6

2. 5

3. 4

4. 9

Q. Dipole moment of which ketone is maximum?

1. 
2. 
3. 
4. 

Q. Which of the following compound has the highest dipole moment?

1. 
2. 
3. 
4. 

Q. An aromatic compound follows (4n+2)$\pi$ rule, where n can not be

1. $\frac{1}{2}$
2. 3
3. 2
4. 1

Q. Which of the following is anti-aromatic in nature?

1. 
2. 
3. 
4. 

Q. In Huckel's (4n + 2) $\pi e^{-}$ rule for aromaticity, 'n' represents?

1. Number of carbon atoms
2. Number of rings
3. Whole number
4. Fractional number (or) integer (or) zero

Q. Which of the following compound is not aromatic?

1. 
2. 
3. 
4. 

Q.

Which of the following are heterocyclic aromatic compounds?

1. 

2. 

3. 

4. 

Q. Identify the aromatic compound?

1. 
2. 
3. 
4. None of the these

Q. Tautomerism is exhibited by:

1. $C{H}_{3}CNO$
2. $(C{H}_3{)}_{2}NH$
3. $R_{3}C{O}_{2}H$
4. $RC{H}_{2}N{O}_2$

Q. The number of π electrons present in the benzene ring is .

1. 3
2. 6
3. 2

Q. The decreasing order of acidic characters of the following is:
I. $CH\equiv CH$
II.
III.

1. I > II > III
2. II > I > III
3. III > II > I
4. I > III > II

Q.
The most stable cannonical structure of this molecule is:

1. 
2. 
3. 
4. All are equally stable