General
✓✗Select the incorrect reaction among the following.
- C6H5CONH2 \( \xrightarrow{\;\text{(i) LiAlH}_4\text{;\;(ii) H}_2\text{O}\;} \) C6H5COOH
- CH3CH2CH2OH \( \xrightarrow{\;\text{CrO}_3-\text{H}_2\text{SO}_4\;} \) CH3CH2COOH
- CH3CH2OH \( \xrightarrow{\;\text{(i) KMnO}_4/\text{OH}^-\text{;\;(ii) H}_3\text{O}^+\;} \) CH3COOH
- CH3COCl \( \xrightarrow{\;\text{H}_2\text{O},\,\Delta\;} \) CH3COOH
General
✓✗Assertion: Chloral (CCl3CHO) forms a stable hydrate.
Reason: The CCl3 group strongly increases the electrophilicity of the carbonyl carbon.
Reason: The CCl3 group strongly increases the electrophilicity of the carbonyl carbon.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗The correct order of acidity is
- CCl3COOH > CF3COOH > CHCl2COOH > CH3COOH
- CHCl2COOH > CCl3COOH > CF3COOH > CH3COOH
- CH3COOH > CHCl2COOH > CCl3COOH > CF3COOH
- CF3COOH > CCl3COOH > CHCl2COOH > CH3COOH
General
✓✗The carbon−oxygen double bond in a carbonyl group is polar because
- it has no lone pairs
- oxygen is more electronegative than carbon
- carbon is more electronegative than oxygen
- it is a single bond
General
✓✗The haloform reaction is given by compounds containing the group
- CH3CO− (or CH3CH(OH)−)
- CHO only
- C6H5
- COOH
General
✓✗Cyclohex-2-en-1-one is treated with H2 gas (1 atm) over Pd/carbon in ethanol. The product A is
- cyclohex-2-en-1-ol
- cyclohex-3-en-1-ol
- cyclohexanone
- cyclohexanol
General
✓✗Formic acid on heating with conc. H2SO4 gives
- methanol
- CO2 and H2
- CO and H2O
- methanal
General
✓✗Reduction of ketones with NaBH4 gives
- alkanes
- primary alcohols
- secondary alcohols
- tertiary alcohols
General
✓✗Clemmensen reduction of a ketone is carried out in the presence of
- H2 and Pt as catalyst
- LiAlH4
- glycol with KOH
- Zn−Hg with HCl
General
✓✗Methyl 2-(2-methyl-6-oxocyclohexyl)acetate (a keto ester) is treated with NaBH4 in C2H5OH. The product is
- the keto alcohol (ester reduced to CH2CH2OH; ring ketone unchanged)
- the diol with the ester converted to CH(OH)CH3
- the hydroxy ester (ring C=O reduced to CH(OH); ester unchanged)
- the ring alcohol with the ester converted to a hemiacetal CH(OH)OCH3
General
✓✗Aldehydes are generally more reactive than ketones towards nucleophilic addition because of
- their lower boiling points
- hydrogen bonding
- steric and electronic reasons
- their higher molecular mass
General
✓✗Cross aldol condensation of benzaldehyde with acetophenone is called
- Rosenmund reaction
- Claisen−Schmidt condensation
- Kolbe reaction
- Cannizzaro reaction
General
✓✗Among HCOOH, CH3COOH and CH3CH2COOH, the order of acidic strength is
- HCOOH > CH3CH2COOH > CH3COOH
- HCOOH > CH3COOH > CH3CH2COOH
- CH3COOH > HCOOH > CH3CH2COOH
- CH3CH2COOH > CH3COOH > HCOOH
General
✓✗Which reagent converts an acid chloride directly into a ketone?
- LiAlH4
- H2/Pd−BaSO4
- NaBH4
- A dialkylcadmium, R2Cd
General
✓✗Benzoic acid (pKa 4.19) is a stronger acid than ethanoic acid (pKa 4.76) mainly because
- benzoic acid is more soluble in water
- benzoate has no resonance
- benzoic acid has a higher molecular mass
- the phenyl group is attached through an sp2 carbon, which is more electronegative than the sp3 carbon of CH3