Formic acud is a stronger acid than acetic acid. This can be explained using
+M effect
-I effect
+I effect
-M effect
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
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
C.
they contain plane of symmetry
Meso compounds are those compounds whose molecules are superimposable on their mirror images inspite of the presence of an asymmetric carbon atom. This is due to internal compensation. The two halves of the molecule rotate the plane of polarised light in opposite direction and hence cancel the effect of each other and make the molecule optically inactive.
Thus, the optical inactivity in meso compounds are because of plane of symmetry or molecular symmetry or internal compensation.
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 2-chloropropane
Acetone + HCN acetonecyano hydrin
Ethylbromide + aq.KOH ethyl alcohol
Hexane 2-methyl pentane