The catalyst used in the conversion of benzene into acetophenone is:

1. Anhydrous AlCl3

2. HNO3

3. HCl

4. Heating

Subtopic:  Aromatic Hydrocarbons - Reactions & Mechanism |
 87%
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The effect of branching on an alkane is:
1. It increases its boiling point
2. It decreases its boiling point
3. It doesn’t change its boiling point
4. None of the above

Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 86%
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What are the products obtained when \(\text{HBr}\) is added to propene in the absence and presence of benzoyl peroxide, respectively?

1. 1-Bromopropane, 2-Bromopropane

2. 2-Bromopropane, 1-Bromopropane

3. 1-Bromopropanol, 2-Bromopropanone

4. 2-Bromopropanone, 1-Bromopropanol

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 83%
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Decreasing order of acidic behavior of benzene, n-hexane, and ethyne is:

1. Hexane > Ethyne > Benzene

2. Benzene > Hexane > Ethyne

3. Ethyne > Benzene > Hexane

4. Benzene > Ethyne > Hexene

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 85%
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Incorrect statement towards reactivity of benzene is:

1. It undergoes electrophilic substitution reactions very easily.
2. Nucleophiles are attracted by a benzene ring.
3. Benzene is a planar molecule. 
4. It has 12 sigma bonds.

Subtopic:  Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
 69%
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Ethyne ? Benzene 

The reagent used in the above conversion is:

1. Cr2O3

2. Alc. KOH

3. Red hot Fe

4. NaNH2/liq.NH3

Subtopic:  Aromatic Hydrocarbons - Reactions & Mechanism |
 89%
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Out of the above alkenes, the ones that can give 2-methyl butane on hydrogenation are:

1. a, b 2. b, c
3. a, c 4. a, b, c
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 77%
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The correct order of decreasing reactivity of the following compounds:

Chlorobenzene, 2,4-Dinitrochlorobenzene, and p-Nitrochlorobenzene

with an electrophile (E+)  is :

1. Chlorobenzene > p–Nitrochlorobenzene > 2,4-Dinitrochlorobenzene
2. p – Nitro chlorobenzene > 2, 4-Dinitrochlorobenzene > Chlorobenzene 
3. Chlorobenzene  > 2, 4-Dinitrochlorobenzene > p-Nitrochlorobenzene
4. 2, 4-Dinitrochlorobenzene > Chlorobenzene > p-Nitrochlorobenzene 

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 71%
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The products of ozonolysis of 1,2-dimethyl benzene (o-xylene) are:

1. Methylglyoxal, 1, 2-dimethylglyoxal, and glyoxal

2. Methylglyoxal, 1, 3-dimethylglyoxal, and glyoxal

3. Methylglyoxal, 1, 4-dimethylglyoxal, and glyoxal

4. Methylglyoxal, 1, 5-dimethylglyoxal, and glyoxal

Subtopic:  Aromatic Hydrocarbons - Reactions & Mechanism |
 72%
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Match the hydrocarbons in Column I with the boiling points given in Column II.

A. n-Pentane 1. 282.5 K
B. Isopentane 2. 309 K
C. Neopentane 3. 301 K


Codes

Options: A B C
1. 2 3 1
2. 1 2 3
3. 2 1 3
4. 3 2 1
Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 88%
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