General
✓✗Heating sodium ethanoate with soda lime gives
- ethane
- ethene
- methane
- propane
General
✓✗The total number of π electrons in one molecule of styrene (C6H5CH=CH2) is
- 6
- 8
- 4
- 10
General
✓✗In the reaction with HCl, an alkene reacts in accordance with Markovnikov’s rule to give 1-chloro-1-methylcyclohexane as the product. The possible alkene is
- methylenecyclohexane (A) only
- 1-methylcyclohexene (B) only
- 3-methylcyclohexene only
- both methylenecyclohexane (A) and 1-methylcyclohexene (B)
General
✓✗For the reaction (cyclohexyl)CH=CH(cyclohexyl) \( \xrightarrow{\;\text{KMnO}_4/\text{H}^+\;} \) P (major product), P is
- 1,2-dicyclohexylethane-1,2-diol
- cyclohexanecarboxylic acid (C6H11COOH)
- 1,2-dicyclohexylethane-1,2-dione
- cyclohexanecarbaldehyde (C6H11CHO)
General
✓✗Ozonolysis of ethene followed by Zn/H2O gives
- two molecules of methanal
- ethanoic acid
- one molecule of ethanal
- methanol
General
✓✗The compound that will react most readily with gaseous bromine has the formula
- C4H10
- C2H4
- C3H6
- C2H2
General
✓✗Hydrogenation of benzene with H2 over Ni at high temperature and pressure gives
- cyclohexene
- cyclohexa-1,3-diene
- cyclohexane
- hexane
General
✓✗1 mol of a hydrocarbon on complete combustion gives 4 mol CO2 and 3 mol H2O. The hydrocarbon could be
- benzene
- butane
- but-1-ene
- but-1-yne or buta-1,3-diene (C4H6)
General
✓✗Statement I: Benzene hexachloride is formed by addition of Cl2 to benzene in UV light.
Statement II: In this reaction, benzene loses its aromatic character.
Statement II: In this reaction, benzene loses its aromatic character.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗A compound with the molecular formula C6H14 has two tertiary carbons. Its IUPAC name is
- 2,2-dimethylbutane
- n-hexane
- 2-methylpentane
- 2,3-dimethylbutane
General
✓✗The order of reactivity of halogens towards alkanes is
- I2 > Br2 > Cl2 > F2
- Cl2 > F2 > Br2 > I2
- F2 > Cl2 > Br2 > I2
- all equal
General
✓✗An alkene C7H14 on ozonolysis gives propanone and butanal. The alkene is
- 3-methylhex-2-ene
- 2-methylhex-2-ene
- 2-methylhex-1-ene
- hept-3-ene
General
✓✗To prepare p-nitrotoluene from benzene, the correct order of steps is
- Friedel−Crafts methylation followed by nitration (and separation from the ortho isomer)
- nitration followed by Friedel−Crafts methylation
- nitration followed by methylation with CH3OH
- sulphonation followed by methylation
General
✓✗Cold, dilute, alkaline KMnO4 converts ethene into
- ethanal
- CO2 and H2O
- ethane-1,2-diol
- ethanoic acid
General
✓✗In the Friedel−Crafts acylation of benzene with CH3COCl, the electrophile is
- CH3CO+ (acylium ion)
- Cl+
- COCl+
- CH3+