Organic Chemistry Multiple Choice Questions and Answers – Structure and Physical Properties

Questions
1 Name the geometry of the central oxygen atom in the ozone molecule (O3).
A Trigonal planar
B Linear
C Tetrahedral
D Pyramidal

Answer: Trigonal planar
2 In which molecule there is a complete linear arrangement of all atoms?
A BF3
B NH3
C CO2
D CH4

Answer: CO2
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3 Choose the incorrect option.
A BrO4 – tetrahedral
B PF3 – pyramidal
C ClO4 – tetrahedral
D BeBr2 – linear

Answer: PF3 – pyramidal
4 Which among the following is not a physical property?
A Melting point
B Boiling point
C Solubility
D Reactivity

Answer: Reactivity
5 A crystalline solid possess which one of the following property?
A Irregularity
B Non- symmetric
C Perfect geometric pattern
D non- stability

Answer: Perfect geometric pattern
6 Melting is process which can be stated by the below statements except?
A Change from a highly disordered stated to an ordered state
B Change from particles in crystal lattice to liquid state
C Thermal energy of particles overcome the intercrystalline forces that hold them
D Change from low temperature to high temperature

Answer: Change from a highly disordered stated to an ordered state
7 Which among the following is not associated with intermolecular forces?
A They hold neutral molecules
B Non- electrostatic in nature
C attraction of oppositely charged particles
D dipole-dipole interaction and van der Waals forces

Answer: Non- electrostatic in nature
8 Which among the following statement is not true?
A In liquid, particles are less regularly arranged and are free to move
B Boiling involves breaking up of group of molecules in liquid
C Boiling involves clubbing of oppositely charged ions
D Thermal energy of particles overcome cohesive forces that hold them

Answer: Boiling involves clubbing of oppositely charged ions
9 When one of the Hydrogen in Methane(CH4) is replaced by a hydroxyl group, then structurally methane resembles?
A Methanol
B Ethanol
C Water
D Both methanol and water

Answer: Both methanol and water
10 Which among the following does not match with the term solubility?
A The structural units get separated from each other
B The ion-dipole bond is very strong
C The spaces in between the structures are occupied by solvent molecules
D The electrostatic attraction between the oppositely charged ions and their corresponding ends are called ion-dipole bond

Answer: The ion-dipole bond is very strong

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