How many optically active stereoisomers are possible forlactic acid ?

Solution

An aromatic compound of formula C₇H₇Cl has in all …..isomers :

Solution

Solution

x is a conjugated diene system, w is an isolated diene system, z is a cumulated diene system,y is antiaromatic system.

Solution

Which one of the following is a technique most suitable for purification of cyclohexanone from a mixture containing benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone?

Crystallization
Sublimation
IR spectroscopy
Gas chromatography

Solution

IR spectroscopy is used for the purification of cyclohexanone from a mixture of benzoic acid, isoamyl alcohol, cyclohexane and cyclohexanone.because in this method, each functional group appear at a certain peak.So, cyclohexane can be identified by carbonyl peak.

Which of the following will have a mesoisomer also?

2, 3- Dichloropentane
2, 3-Dichlorobutane
2-Chlorobutane
2-Hydroxypropanoic acid

Solution

Solution

The most suitable method for separation of a 1 : 1 mixture of ortho and para nitrophenols is

sublimation
chromatography
crystallization
steam distillation

Solution

The boiling point of o-nitrophenol is less than para-nitrophenol due to presence of intra molecular hydrogen bonding. Since p-nitrophenol is less volatile in steam than o-nitrophenolhence they can be separated by steam distillation.

Solution

Solution

It has centre of symmetry,so optically inactive.

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