MODULE 6: Organic Compounds (Basic Concepts)

Which type of organic formula gives the simplest ratio of the atoms present in a compound?

• Structural formula

• Molecular formula

• Empirical formula

• General formula

According to the structural theory proposed by August Kekule, what is the normal valence of each carbon atom in an organic molecule?

• 5

• 2

• 3

• 4

What type of carbon atom is attached to only 1 carbon atom?

• Secondary carbon atom

• Tertiary carbon atom

• Primary carbon atom

• Quaternary carbon atom

Which type of isomerism arises as a result of the different sequences of the carbon atoms in a molecule?

• Functional isomerism

• Skeletal or chain isomerism

• Positional isomerism

• Geometric isomerism

In which type of organic reaction does a single reactant split into two new products?

• Rearrangement reactions

• Substitution reactions

• Elimination reactions

• Addition reactions

What is the characteristic of elimination reactions in organic chemistry?

• Addition of one molecule across a multiple bond in another molecule

• Reorganization of bonds and atoms to yield an isomeric product

• Formation of a multiple bond linkage in the larger molecule

• Exchange of parts to give two new products

Which type of organic reaction occurs when two reactants exchange parts to give two new products?

• Substitution reactions

• Elimination reactions

• Rearrangement reactions

• Addition reactions

What is the homologous series for alkanes?

• CH3CH2CH2CH3, CH3CH2CH2CH2OH, CH2CH2CH2CH2CH3

• CH3CH2CH2CH2CH2CH3, CH3CH2CH2CH2CH2CH2OH

• CH3CH2OH, CH3CH2CH3, CH3CH2CH2OH

• CH4, CH3OH, CH3CH3

In which type of isomerism can the groups attached to the doubly bonded carbons be arranged either on the same plane of the double bond (cis) or on the opposite side (trans)?

• Skeletal or chain isomerism

• Geometric isomerism

• Positional isomerism

• Functional isomerism

What is the shorthand convention for writing Kekule structural formulas?

• Molecular formula

• Condensed structural formula

• General formula

• Empirical formula