Introduction to Organic Chemistry
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[2 Marks]
Which of the following properties are shown by simple hydrocarbons with 4-5 carbon atoms?
Low melting point
Combustibility
Isomerism
Low boiling point
Why do isomeric branched alkanes normally exhibit lower boiling points than unbranched alkanes of the same carbon content?
Normal alkanes have greater Van der Waal forces
Branched alkanes have greater Van der Waal forces
Branched alkanes have lesser Van der Waal forces
Branched alkanes have greater repulsive forces
The molecular mass of any two homologues differ by?
12
14
16
15
What specific characteristic of alkane is suggested when their vapors, cause severe damage to lung tissue by dissolving the fatty material in cell membranes?
Alkanes dissolve fully in water
Alkanes dissolve partially in water
Alkanes dissolve in non-polar organic solvents
Alkanes dissolve slightly in non-polar organic solvents
The general formula of alkenes is:
CnH2n
CnH2n+2
CnH2n+4
CnH2n−2
Why do solid alkanes have low melting point?
Weak repulsive forces between electrons of neighboring atoms
Strong repulsive forces between electrons of neighbouring atoms
Weak attractive forces between electrons of neighboring atoms
Strong attractive forces between electrons of neighboring atoms
Select the correct range of carbon atoms of alkene series which are liquid.
6 to 16 number of carbon atoms
5 to 10 number of carbon atoms
5 to 15 number of carbon atoms
6 to 15 number of carbon atoms
What do we call the formula which gives us the relative arrangements of bonded atoms in a molecule?
Functional series formula
Homologous series formula
Structural formula
Condensed formula
What is the reason behind alkane's insolubility in water?
Dipole-dipole forces in water is lesser than Van der Waal force of alkanes and water
Dipole-dipole forces in water is greater than Van der Waal force of alkanes and water
Van der Waal forces in water is greater than Van der Waal force of alkanes and water
Dipole-dipole forces of water is greater than dipole force of alkanes and water