MCQs on Overlapping and Bonds
1. Which of the following at ordinary temperature and pressure exists as a linear polymer due to extensive hydrogen bonding?
(a) H2O
(b) HCl
(c) HF
(d) NH3
Answer:::: (c)
2. The shape of SF3Cl3 molecule is
(a) triangle bi-pyramidal
(b) cubic
(c) octahedral
(d) tetrahedral
Answer:::: (c)
3. The structure of CH2=C=H2 is
(a) linear
(b) planar
(c) non-planar
(d) has several reasoning structure
Answer:::: (a)
4. Which is the correct arrangement of the molecules based on dipole moments?
(a) BF3 > NF3 > NH3
(b) NF3 > BF3 > NH3
(c) NH3 > BH3 > NF3
(d) NH3 > NF3 > BF3
Answer:::: (d)
5. When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?
(a) Ionic interaction
(b) covalent attraction
(c) van der waals forces
(d) hydrogen bond formation
Answer:::: (d)
6. Which of the following is diamagnetic?
(a) Superoxide ion
(b) carbon molecule
(c) unipositive ion of nitrogen molecule
(d) oxygen molecule
Answer:::: (b)
7. A molecule of fluorine is formed by
(a) the axial p-p orbital overlap
(b) the sidewise p-p orbital overlap
(c) the axial s-s orbital overlap
(d) the axial s-p orbital overlap
Answer:::: (d)
8. Which one of the following molecules has the smallest bonds?
(a) NH3
(b) PH3
(c) H2O
(d) H2Se
Answer:::: (d)
9. Polarity in a molecule and hence the dipole moment depends primarily on electronegativity to the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?
(a) CO2
(b) HI
(c) H2O
(d) SO2
Answer:::: (c)
10. The electron configuration of the outermost shell of the most electronegative element is
(a) 2s22p2
(b) 3s23p5
(c) 4s24p5
(d) 5s25p5
Answer:::: (a)
