231.

Formic acud is a stronger acid than acetic acid. This can be explained using

• +M effect

• -I effect

• +I effect

• -M effect

The IUPAC name of 

• but-3-enoic acid

• but-1-enoic-acid

• pent-4-enoic acid

• prop-2-enoic acid

Mesomeric effect involves

• delocalisation of π- electron

• delocalisation of σ- electron

• partial displacement of electrons

• delocalisation of π and σ- electron

The IUPAC name of 

• 2-hydroxy-4-pentanone

• 2-oxo-4-pentanol

• 4-keto-2-pentanol

• 4-hydroxy-2-pentanon

An oxygen containing organic compound was found to contain 52% carbon and 13% of hydrogen. Its vapour density is 23.The compound reacts with sodium metal to liberate hydrogen. A functional isomer of this compound is

• ethanal

• methoxy methane

• methoxy ethane

• ethanol

The number of optical isomers of the compound CH₃—CHBr—CHBr—COOH is

• 0

• 1

• 3

• 4

Mesa compounds do not show optical activity because

• they do not contain chiral carbon atoms

• they have non-superimposable mirror images

• they contain plane of symmetry

• they do not contain plane of symmetry

An aromatic compound 'A' (C₇H₉N) on reacting with NaNO₂/HCl at 0°C forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound 'A' is

• 5

• 7

• 3

• 6

Carbocation as an intermediate is likely to be formed in the reaction

• Propene + Cl₂ $\stackrel{hv}{\to }$ 2-chloropropane

• Acetone + HCN $\stackrel{-OH}{\to }$ acetonecyano hydrin

• Ethylbromide + aq.KOH $\stackrel{∆}{\to }$ ethyl alcohol

• Hexane $\stackrel{\mathrm{anhy}. {\mathrm{AlCl}}_3/ \mathrm{HCl}}{\to }$ 2-methyl pentane

The IUPAC name of 'B' is

• 3-methylbutan-2-ol

• 2-methylbutan-3-ol

• 2-methylbutan-2-ol

• pentan-2-ol