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Home/ Chemistry/Chemistry MCQ with Answer Explanation : Coordination compounds.

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On: October 14, 2024 Posted in Chemistry, Education, Exam Comments: 0 Views: 490

Chemistry MCQ with Answer Explanation : Coordination compounds.

61. Which of the following molecules exhibits resonance?

a) CH4
b) H2O
c) NO3^-
d) NH3

Answer: c) NO3^-

Explanation: The nitrate ion (NO3^-) exhibits resonance, as it can be represented by multiple Lewis structures with delocalized electrons.

62. The hybridization of xenon in XeF4 is:

a) sp3
b) sp3d
c) sp3d2
d) sp2

Answer: c) sp3d2

Explanation: In xenon tetrafluoride (XeF4), the xenon atom undergoes sp3d2 hybridization, resulting in a square planar geometry.

63. Which of the following compounds contains both sigma and pi bonds?

a) H2O
b) CO2
c) CH4
d) CCl4

Answer: b) CO2

Explanation: In carbon dioxide (CO2), each carbon-oxygen bond contains both a sigma bond and a pi bond due to the double bonds between carbon and oxygen.

64. Which of the following molecules is polar?

a) BF3
b) CH4
c) H2O
d) CCl4

Answer: c) H2O

Explanation: Water (H2O) is polar because of its bent structure and the electronegativity difference between hydrogen and oxygen.

65. The number of bonding and lone pairs in ClF3 is:

a) 5 bonding pairs and 0 lone pairs
b) 3 bonding pairs and 2 lone pairs
c) 2 bonding pairs and 3 lone pairs
d) 4 bonding pairs and 1 lone pair

Answer: b) 3 bonding pairs and 2 lone pairs

Explanation: In chlorine trifluoride (ClF3), the central chlorine atom has 3 bonding pairs and 2 lone pairs, giving it a T-shaped geometry.

66. Which of the following exhibits tetrahedral geometry?

a) SF6
b) XeF4
c) CH4
d) IF5

Answer: c) CH4

Explanation: Methane (CH4) has tetrahedral geometry with bond angles of 109.5° due to sp3 hybridization of the central carbon atom.

67. The bond order of nitrogen in N2 is:

a) 1
b) 2
c) 3
d) 4

Answer: c) 3

Explanation: Nitrogen (N2) has a bond order of 3, indicating a triple bond between the two nitrogen atoms, which includes one sigma bond and two pi bonds.

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

a) HCl
b) CHCl3
c) CO2
d) NH3

Answer: c) CO2

Explanation: Carbon dioxide (CO2) has a linear structure, and the dipole moments of the two polar C=O bonds cancel each other out, resulting in a dipole moment of zero.

69. Which of the following compounds has a trigonal bipyramidal geometry?

a) CH4
b) PCl5
c) SF6
d) XeF4

Answer: b) PCl5

Explanation: Phosphorus pentachloride (PCl5) has a trigonal bipyramidal geometry due to the sp3d hybridization of the central phosphorus atom.

70. Which of the following compounds exhibits octahedral geometry?

a) SF6
b) XeF4
c) IF5
d) PCl5

Answer: a) SF6

Explanation: Sulfur hexafluoride (SF6) has an octahedral geometry with bond angles of 90° due to sp3d2 hybridization.

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