Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Disymmetric object is one which is:

• superimposable on its mirror image

• non-superimposable on its mirror image

• optically inactive

• achiral

Cycloalkane has the formula :

• C_nH_2n+2

• C_nH_2n-2

• C_nH_2n

• C_2nH₂

To differentiate between carbon-12, carbon-13 and carbon-14, the instrument that you would use is :

• infra-red spectrometer

• atomic absorption spectrometer

• mass spectrometer

• ultraviolet spectrometer

A mixture of sand and iodine can be separated by:

• crystallisation

• sublimation

• distillation

• fractionation

The number of isomeric hexanes is:

• 5

• 2

• 3

• 4

The two optical isomers given below, namely are:

• enantiomers

• geometrical isomers

• diastereomers

• structural isomers

Which of the following statement is wrong ?

• Using Lassaigne's test nitrogen and sulphur present in organic compound can be tested

• Using Beilstein's test the presence of halogen in a compound can be tested.

• In Lassaigne's filtrate the nitrogen present in a organic compound is converted into NaCN

• In the estimation of carbon, an organic compound is heated with CaO in a combustion tube

Cis-trans isomers generally :

• contain an asymmetric carbon atom

• contain double bonded carbon atoms

• rotate the plane of polarized light

• are enantiomorphs

How many structural isomers are possible for C₄H₉Cl?

• 2

• 4

• 8

• 10

Which of the following compound is optically active?

• 1 - butanol

• Isopropyl alcohol

• Acetaldehyde

• 2 - butanol