Chemistry : Organic Chemistry – Some Basic Principles and Techniques

The characteristic colours given by calcium, strontium and barium in the flame test are respectively :

• brick red, apple green, crimson

• crimson, apple green, brick red

• crimson, brick red, apple green

• brick red, crimson, apple green

The pair of [Co(SO₄)(NH₃)₅]Cl and [CoCl(NH₃)₅] SO₄ constitutes :

• ionisation isomers

• optical isomers

• linkage isomers

• co-ordination isomers

Lassaigne's test is used to detect :

• nitrogen and halogens

• sodium and halogens

• halogens and sulphur

• nitrogen, sulphur and halogens

The number of possible structural isomers of butene are:

• 3

• 2

• 4

• 1

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