Q. No.The product obtained on the addition of HBr to propene in the absence and presence of benzoyl peroxide are 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. iso-pentane | 2. 309 K |
| C. neo-pentane | 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 |
Assertion: Toluene on Friedel Crafts methylation gives o- and p- xylene.
Reason: -group bonded to benzene ring increases electron density at o- and p- position.
1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Assertion is false but the reason is true.
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