232280
Which of the following compounds are aromatic?
1 (i), (ii) \& (iii) only
2 (ii), (iii) \& (iv) only
3 (i), (iv) \& (v) only
4 (iii), (iv) \& (v) only
Explanation:
(C): According to Huckel's rule, the aromatic compound must have $(4 \mathrm{n}+2) \pi \mathrm{e}^{-}$system $\left(2,6,10,14 \mathrm{e}^{-}\right.$ ), cyclic, planer and conjugation of $\mathrm{e}^{-}$. Thus, (i), (iv) \& (v) are Aromatic.
AP EAMCET 25-08-2021 Shift - I
GENERAL ORGANIC CHEMISTRY
232285
For a compound with empirical formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$, how many aromatic structures are possible?
1 9
2 5
3 7
4 4
Explanation:
(B): For the compund having formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$ there are 5 aromatic isomers. (1) Benzyl alcohol (2) o-methyl phenol (3) m-methyl phenol (4) p-methyl phenol (5) Anisole Hence, the correct option is (b).
AP EAMCET (Engg.) 21.09.2020
GENERAL ORGANIC CHEMISTRY
232289
Identify $A$ in the given chemical reaction.
1
2
3
4
Explanation:
**Aromatisation reaction:-** n-alkanes having six or more carbon atoms on heating at very high temperature and high pressure in the presence of oxides of $\mathrm{V}_{2} \mathrm{O}_{5} / \mathrm{Mo}_{2} \mathrm{O}_{3} / \mathrm{Cr}_{2} \mathrm{O}_{3}$ supported over alumina get dehydrogenated and cyclised to benzene or its derivative.
JEE Main 25-02-2021
GENERAL ORGANIC CHEMISTRY
232290
Total number of aromatic compounds from below is :
1 2
2 3
3 4
4 5
Explanation:
Aromatic compounds are compounds that consist of conjugated planar ring system accompanied by delocalised $\pi$-electron cloud in place or individual alternating double or single bond compound which follow Huckel's rule or $(4 n+2) \pi e^{-}$rule are called aromatic compound. So, it is aromatic compound due to $6 \mathrm{e}^{-}$. Hence, total number of aromatic compound is 3 .
232280
Which of the following compounds are aromatic?
1 (i), (ii) \& (iii) only
2 (ii), (iii) \& (iv) only
3 (i), (iv) \& (v) only
4 (iii), (iv) \& (v) only
Explanation:
(C): According to Huckel's rule, the aromatic compound must have $(4 \mathrm{n}+2) \pi \mathrm{e}^{-}$system $\left(2,6,10,14 \mathrm{e}^{-}\right.$ ), cyclic, planer and conjugation of $\mathrm{e}^{-}$. Thus, (i), (iv) \& (v) are Aromatic.
AP EAMCET 25-08-2021 Shift - I
GENERAL ORGANIC CHEMISTRY
232285
For a compound with empirical formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$, how many aromatic structures are possible?
1 9
2 5
3 7
4 4
Explanation:
(B): For the compund having formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$ there are 5 aromatic isomers. (1) Benzyl alcohol (2) o-methyl phenol (3) m-methyl phenol (4) p-methyl phenol (5) Anisole Hence, the correct option is (b).
AP EAMCET (Engg.) 21.09.2020
GENERAL ORGANIC CHEMISTRY
232289
Identify $A$ in the given chemical reaction.
1
2
3
4
Explanation:
**Aromatisation reaction:-** n-alkanes having six or more carbon atoms on heating at very high temperature and high pressure in the presence of oxides of $\mathrm{V}_{2} \mathrm{O}_{5} / \mathrm{Mo}_{2} \mathrm{O}_{3} / \mathrm{Cr}_{2} \mathrm{O}_{3}$ supported over alumina get dehydrogenated and cyclised to benzene or its derivative.
JEE Main 25-02-2021
GENERAL ORGANIC CHEMISTRY
232290
Total number of aromatic compounds from below is :
1 2
2 3
3 4
4 5
Explanation:
Aromatic compounds are compounds that consist of conjugated planar ring system accompanied by delocalised $\pi$-electron cloud in place or individual alternating double or single bond compound which follow Huckel's rule or $(4 n+2) \pi e^{-}$rule are called aromatic compound. So, it is aromatic compound due to $6 \mathrm{e}^{-}$. Hence, total number of aromatic compound is 3 .
232280
Which of the following compounds are aromatic?
1 (i), (ii) \& (iii) only
2 (ii), (iii) \& (iv) only
3 (i), (iv) \& (v) only
4 (iii), (iv) \& (v) only
Explanation:
(C): According to Huckel's rule, the aromatic compound must have $(4 \mathrm{n}+2) \pi \mathrm{e}^{-}$system $\left(2,6,10,14 \mathrm{e}^{-}\right.$ ), cyclic, planer and conjugation of $\mathrm{e}^{-}$. Thus, (i), (iv) \& (v) are Aromatic.
AP EAMCET 25-08-2021 Shift - I
GENERAL ORGANIC CHEMISTRY
232285
For a compound with empirical formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$, how many aromatic structures are possible?
1 9
2 5
3 7
4 4
Explanation:
(B): For the compund having formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$ there are 5 aromatic isomers. (1) Benzyl alcohol (2) o-methyl phenol (3) m-methyl phenol (4) p-methyl phenol (5) Anisole Hence, the correct option is (b).
AP EAMCET (Engg.) 21.09.2020
GENERAL ORGANIC CHEMISTRY
232289
Identify $A$ in the given chemical reaction.
1
2
3
4
Explanation:
**Aromatisation reaction:-** n-alkanes having six or more carbon atoms on heating at very high temperature and high pressure in the presence of oxides of $\mathrm{V}_{2} \mathrm{O}_{5} / \mathrm{Mo}_{2} \mathrm{O}_{3} / \mathrm{Cr}_{2} \mathrm{O}_{3}$ supported over alumina get dehydrogenated and cyclised to benzene or its derivative.
JEE Main 25-02-2021
GENERAL ORGANIC CHEMISTRY
232290
Total number of aromatic compounds from below is :
1 2
2 3
3 4
4 5
Explanation:
Aromatic compounds are compounds that consist of conjugated planar ring system accompanied by delocalised $\pi$-electron cloud in place or individual alternating double or single bond compound which follow Huckel's rule or $(4 n+2) \pi e^{-}$rule are called aromatic compound. So, it is aromatic compound due to $6 \mathrm{e}^{-}$. Hence, total number of aromatic compound is 3 .
232280
Which of the following compounds are aromatic?
1 (i), (ii) \& (iii) only
2 (ii), (iii) \& (iv) only
3 (i), (iv) \& (v) only
4 (iii), (iv) \& (v) only
Explanation:
(C): According to Huckel's rule, the aromatic compound must have $(4 \mathrm{n}+2) \pi \mathrm{e}^{-}$system $\left(2,6,10,14 \mathrm{e}^{-}\right.$ ), cyclic, planer and conjugation of $\mathrm{e}^{-}$. Thus, (i), (iv) \& (v) are Aromatic.
AP EAMCET 25-08-2021 Shift - I
GENERAL ORGANIC CHEMISTRY
232285
For a compound with empirical formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$, how many aromatic structures are possible?
1 9
2 5
3 7
4 4
Explanation:
(B): For the compund having formula $\mathrm{C}_{7} \mathrm{H}_{8} \mathrm{O}$ there are 5 aromatic isomers. (1) Benzyl alcohol (2) o-methyl phenol (3) m-methyl phenol (4) p-methyl phenol (5) Anisole Hence, the correct option is (b).
AP EAMCET (Engg.) 21.09.2020
GENERAL ORGANIC CHEMISTRY
232289
Identify $A$ in the given chemical reaction.
1
2
3
4
Explanation:
**Aromatisation reaction:-** n-alkanes having six or more carbon atoms on heating at very high temperature and high pressure in the presence of oxides of $\mathrm{V}_{2} \mathrm{O}_{5} / \mathrm{Mo}_{2} \mathrm{O}_{3} / \mathrm{Cr}_{2} \mathrm{O}_{3}$ supported over alumina get dehydrogenated and cyclised to benzene or its derivative.
JEE Main 25-02-2021
GENERAL ORGANIC CHEMISTRY
232290
Total number of aromatic compounds from below is :
1 2
2 3
3 4
4 5
Explanation:
Aromatic compounds are compounds that consist of conjugated planar ring system accompanied by delocalised $\pi$-electron cloud in place or individual alternating double or single bond compound which follow Huckel's rule or $(4 n+2) \pi e^{-}$rule are called aromatic compound. So, it is aromatic compound due to $6 \mathrm{e}^{-}$. Hence, total number of aromatic compound is 3 .
