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Multiple Choice Questions on Basic Science-Chemistry Set-1

MCQ on Chemical bonding and catalysis

1. If a bond is made up of a large number of organic compound, then the bond is termed as?

  • Ionic bond
  • Metallic bond
  • Covalent bond
  • Dipolar bond

Answer : C

2. The Valence Bond Theory does not explain the paramagnetic nature of oxygen molecule.

  • True
  • False

Answer : A

3. Electrovalent compounds are

  • low melting
  • insoluble in polar solvents
  • conductors in fused state
  • none of the above

Answer : C

4. An element having 4 electrons in its outermost orbit forms bond by

  • losing electrons
  • gaining electrons
  • sharing electrons
  • any of the above

Answer : C

5. The bond between two atoms of the same element is

  • polar covalent bond
  • ionic bond
  • non-polar covalent bond
  • none of the above

Answer : C

6. An atom differs from its ion in which among the following?

  • Mass number
  • Atomic number
  • Neutrons
  • Number of protons

Answer : D

7. State whether the given statement is true or false “Ionic bonds are non-directional”.

  • True
  • False

Answer : A

8. In which of the following C-C bond length is least?

  • benzene
  • diamond
  • ethylene
  • acetylene

Answer : D

9. Octet rule is not valid for the molecule

  • CO2
  • H2O
  • O2
  • CO

Answer : D

10. What is the name given to the electrons in the highest occupied energy level of an atom?

  • orbital electrons
  • valence electrons
  • anions
  • cations

Answer : B

11. Valence Bond Theory was developed in the year?

  • 1916
  • 1927
  • 1930
  • 1932

Answer : B

12. Ionic compounds don’t conduct electricity in

  • solution
  • fused state
  • solid state
  • none of the above

Answer : C

13. Almost 95% of compounds are of carbon because they can form

  • single bonds
  • double bonds
  • triple bonds
  • multiple bonds

Answer : D

14. Which orbital would form a more stronger bond if both of them have identical stability?

  • The one which is less directionally concentrated
  • The one which is more directionally concentrated
  • Both will be equally strong
  • It differs from atom to atom

Answer : B

15. Lead is a metallic crystal having a _______ structure.

  • FCC
  • BCC
  • HCP
  • TCP

Answer : A

16. In amorphous solids, the atoms or molecules are held together in a completely random formation.

  • True
  • False

Answer : A

17. The energy released when an electron is added to an atom is the gaseous state is called ..........

  • electro positivity
  • ionization potential
  • electron affinity
  • electrone gativity

Answer : C

18. Crystal lattice is also known as ........

  • lattice triangle
  • space lattice
  • lattice line
  • lattice arrangement

Answer : B

19. Which of the following is not a category of catalysis?

  • Homogeneous
  • Heterogeneous
  • Artificial
  • Enzymatic

Answer : C

20. Which of the following is not a characteristic of a catalyst?

  • It participates in the reaction
  • It enhances the equilibrium rate
  • It activates equilibrium
  • It initialises the reaction

Answer : A