Welcome to the Sigma And Pi Bond MDCAT MCQs with Answers. In this post, we have shared Sigma And Pi Bond Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Chemistry offers a chance to enhance your knowledge regarding Sigma And Pi Bond MCQs in this MDCAT Online Test.
A sigma (σ) bond is formed by the overlap of which type of orbitals?
a) P and p orbitals
b) S and s orbitals
c) S and p orbitals
d) P and d orbitals
Which type of bond is characterized by a side-by-side overlap of orbitals?
a) Sigma (σ) bond
b) Pi (π) bond
c) Ionic bond
d) Metallic bond
How many sigma bonds are present in a molecule of ethylene (C₂H₄)?
a) 2
b) 3
c) 4
d) 5
In a double bond between two carbon atoms, which type of bond is formed first?
a) Pi (π) bond
b) Sigma (σ) bond
c) Ionic bond
d) Hydrogen bond
The number of π bonds in the molecule of acetylene (C₂H₂) is:
a) 0
b) 1
c) 2
d) 3
Which bond type is responsible for the rotational freedom around the bond axis?
a) Sigma (σ) bond
b) Pi (π) bond
c) Ionic bond
d) Metallic bond
In which of the following compounds are all bonds sigma bonds only?
a) Ethylene (C₂H₄)
b) Ethyne (C₂H₂)
c) Methane (CH₄)
d) Benzene (C₆H₆)
Which of the following statements is true about pi (π) bonds?
a) They are formed by end-to-end overlap of orbitals.
b) They are stronger than sigma (σ) bonds.
c) They allow for free rotation around the bond axis.
d) They are formed by side-by-side overlap of p orbitals.
How many sigma bonds are in a molecule of carbon dioxide (CO₂)?
a) 2
b) 3
c) 4
d) 6
The bond angle in a molecule with only sigma bonds and a tetrahedral geometry is:
a) 90°
b) 109.5°
c) 120°
d) 180°
In a triple bond, how many sigma bonds and pi bonds are present?
a) 1 sigma, 1 pi
b) 1 sigma, 2 pi
c) 2 sigma, 1 pi
d) 2 sigma, 2 pi
Which bond(s) is/are present in the molecule of hydrogen chloride (HCl)?
a) Sigma bond only
b) Pi bond only
c) Both sigma and pi bonds
d) None
The number of pi bonds in a molecule of benzene (C₆H₆) is:
a) 0
b) 1
c) 3
d) 6
Which type of bond is found in the internuclear axis in ethylene (C₂H₄)?
a) Pi bond
b) Sigma bond
c) Ionic bond
d) Hydrogen bond
The bond length of a pi bond compared to a sigma bond is generally:
a) Shorter
b) Longer
c) Same
d) Not comparable
In the molecule of acetylene (C₂H₂), how many total bonds are present?
a) 3
b) 4
c) 5
d) 6
In which of the following molecules is the central atom bonded by only sigma bonds?
a) Ethene (C₂H₄)
b) Ammonia (NH₃)
c) Oxygen difluoride (OF₂)
d) Carbon tetrachloride (CCl₄)
The bond type that prevents free rotation around the bond axis is:
a) Sigma (σ) bond
b) Pi (π) bond
c) Ionic bond
d) Metallic bond
In the molecule of ethylene glycol (HOCH₂CH₂OH), the number of sigma bonds is:
a) 4
b) 6
c) 8
d) 10
Which of the following statements about sigma and pi bonds is correct?
a) Sigma bonds are weaker than pi bonds.
b) Pi bonds allow free rotation around the bond axis.
c) Sigma bonds are formed by end-to-end overlap.
d) Pi bonds are formed by end-to-end overlap.
In a double bond, which type of bond is always the first bond formed?
a) Pi bond
b) Sigma bond
c) Ionic bond
d) Hydrogen bond
How many sigma bonds are present in the structure of ethyne (C₂H₂)?
a) 1
b) 2
c) 3
d) 4
Which of the following compounds has only sigma bonds?
a) Benzene (C₆H₆)
b) Acetylene (C₂H₂)
c) Methane (CH₄)
d) Ethylene (C₂H₄)
The number of pi bonds in the molecule of ozone (O₃) is:
a) 0
b) 1
c) 2
d) 3
The bond type present in the hydrogen molecule (H₂) is:
a) Sigma bond only
b) Pi bond only
c) Both sigma and pi bonds
d) Ionic bond
In which of the following does the central atom have sp³ hybridization and form sigma bonds with four substituents?
a) Water (H₂O)
b) Methane (CH₄)
c) Carbon dioxide (CO₂)
d) Ethene (C₂H₄)
The type of bond that can be formed by the overlap of d orbitals is:
a) Sigma bond
b) Pi bond
c) Both sigma and pi bonds
d) Neither sigma nor pi bond
The bond angle in a molecule with only sigma bonds and a trigonal planar geometry is:
a) 90°
b) 120°
c) 109.5°
d) 180°
In a molecule of butyne (C₄H₆), the total number of pi bonds is:
a) 2
b) 3
c) 4
d) 5
In which of the following molecules is the central atom sp² hybridized and bonded by sigma and pi bonds?
a) Ethylene (C₂H₄)
b) Acetylene (C₂H₂)
c) Methane (CH₄)
d) Ammonia (NH₃)
The number of sigma bonds in the structure of chloroform (CHCl₃) is:
a) 3
b) 4
c) 5
d) 6
Which of the following statements is true about pi bonds in a double bond?
a) They are formed by the overlap of s orbitals.
b) They are weaker than sigma bonds.
c) They allow free rotation around the bond axis.
d) They are formed by side-by-side overlap of p orbitals.
In which molecule does the central atom have sp hybridization and form a linear shape?
a) CO₂
b) CH₄
c) NH₃
d) H₂O
In a triple bond between two carbon atoms, the number of pi bonds is:
a) 1
b) 2
c) 3
d) 4
Which bond type contributes to the formation of a molecular orbital in a pi bond system?
a) Sigma bond
b) Pi bond
c) Ionic bond
d) Metallic bond
How many sigma and pi bonds are in a molecule of sulfur dioxide (SO₂)?
a) 2 sigma, 1 pi
b) 1 sigma, 2 pi
c) 2 sigma, 2 pi
d) 3 sigma, 1 pi
The bond angles in a molecule with sp² hybridization and trigonal planar geometry are approximately:
a) 90°
b) 120°
c) 109.5°
d) 180°
In which of the following does the central atom have sp³d hybridization and form a trigonal bipyramidal structure?
a) SF₆
b) ClF₃
c) PCl₅
d) NH₃
The total number of sigma bonds in a molecule of dimethyl ether (CH₃OCH₃) is:
a) 6
b) 8
c) 10
d) 12
Which bond type prevents free rotation around the bond axis and is generally found in double and triple bonds?
a) Sigma bond
b) Pi bond
c) Ionic bond
d) Metallic bond
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