Atomic Bondings in Solids MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Atomic Bondings in Solids”.

1. VSEPR stands for Valence Shell Electron Pair Repulsion. This theory helps us predict:
a) Bond angles
b) Bond length
c) Electron energy
d) Shell radius

2. In water, the bond angle between the H-O H-O bond is less than 109° Why?
a) The H atoms attract each other
b) Oxygen atom is much larger than Hydrogen atoms
c) Lone pair-bond pair repulsion is greater than bond pair-bond pair repulsion
d) VSEPR theory does not apply for planar molecules like water

3. Which of the following is a secondary bond?
a) Metallic bond
b) Hydrogen bond
c) Covalent bond
d) Ionic bond

4. For covalent molecules, van der Waals radius is always greater than a covalent radius.
a) True
b) False

5. Which of the following molecules is non-linear?
a) Hbr
b) CO2
c) C2H2
d) H2S

6. sp3 hybridization is present in which of the following molecules?
a) BeCl2
b) H2O
c) C2H4
d) BCl3

7. If E1 is the bond enthalpy of a sigma-bond and E2 is that of a pi-bond, then:
a) E1 > E2
b) E1 = E2
c) E1 < E2
d) Can’t be predicted

8. With an increase in bond length, bond energy:
a) increases
b) decreases
c) may either increase or decrease
d) does not change

9. Which of the following is the correct order for bonding energies of molecular orbitals?
a) σ1s < σ2s < σ*2s < σ*1s
b) σ1s < σ2s < σ*1s < σ*2s
c) σ1s < σ*1s < σ2s < σ*2s
d) none of the mentioned

10. Which of the following molecules is diamagnetic?
a) O2
b) CO
c) N_2^+
d) NO

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