Unit 6: Chemical Bonding

41. Which molecule has a trigonal bipyramidal shape?

a) SF₄
b) PCl₅
c) NH₃
d) CH₄
Answer: b) PCl₅

42. What type of bond is present in a molecule of hydrogen chloride (HCl)?

a) Nonpolar covalent bond
b) Polar covalent bond
c) Ionic bond
d) Metallic bond
Answer: b) Polar covalent bond

43. Which of the following molecules has a dipole moment of zero?

a) NH₃
b) H₂O
c) CO₂
d) HCl
Answer: c) CO₂

44. Which molecule has the greatest bond angle?

a) NH₃
b) H₂O
c) CO₂
d) CH₄
Answer: c) CO₂

45. Which of the following compounds exhibits metallic bonding?

a) NaCl
b) MgO
c) Fe
d) H₂O
Answer: c) Fe

46. The hybridization of the central atom in carbon tetrachloride (CCl₄) is:

a) sp
b) sp²
c) sp³
d) sp³d
Answer: c) sp³

47. Which molecule has a bent shape due to lone pair repulsion?

a) CO₂
b) CH₄
c) H₂O
d) PCl₅
Answer: c) H₂O

48. What is the bond angle in a molecule with trigonal planar geometry?

a) 90°
b) 109.5°
c) 120°
d) 180°
Answer: c) 120°

49. Which of the following is a polar molecule?

a) CCl₄
b) CH₄
c) H₂
d) H₂O
Answer: d) H₂O

50. Which element has the highest electronegativity?

a) Hydrogen
b) Oxygen
c) Nitrogen
d) Fluorine
Answer: d) Fluorine