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
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
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
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
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. |
The reagent used in the above conversion is:
1. Cr2O3
2. Alc. KOH
3. Red hot Fe
4. NaNH2/liq.NH3
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 |
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 |
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
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 |
Match the reactions given in Column-I with the type of reaction given in Column-II and mark the appropriate option:
| Column-I | Column-II | ||
| A. | CH2=CH2 + H2O \(\xrightarrow[]{H^{+}}\) CH3CH2OH |
1. | Hydrogenation |
| B. | CH2=CH2 + H2 \(\xrightarrow[]{Pd}\) CH3-CH3 |
2. | Halogenation |
| C. | CH2=CH2 + Cl2 → Cl-CH2-CH2-Cl |
3. | Polymerisation |
| D. | 3CH≡CH \(\xrightarrow[heat]{Cu \ tube}\) C6H6 |
4. | Hydration |
| 5. | Condensation | ||
Codes:
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 1 | 2 | 3 |
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