Home
Class 12
CHEMISTRY
Assertion : sigma-bond is strong white p...

Assertion : `sigma`-bond is strong white `pi` -bond is a weak bond.
Reason :Atomic rotate freely about `pi`-bond.

A

If both the assertion and reason are true and reason is correct explanation of the assertion .

B

If both the assertion and reason are true but reason is not a correct explanation of the assertion .

C

If the assertion is true but the reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason about sigma and pi bonds, let's break it down step by step: ### Step 1: Understand the Assertion The assertion states that "sigma bond is strong while pi bond is a weak bond." - **Explanation**: Sigma (σ) bonds are formed by the head-on overlap of atomic orbitals, which allows for a strong bond due to the direct overlap. This makes sigma bonds stronger than pi bonds. ### Step 2: Evaluate the Reason The reason given is "Atomic orbitals rotate freely about pi bond." - **Explanation**: Pi (π) bonds are formed by the lateral (side-to-side) overlap of atomic orbitals. This arrangement does not allow for free rotation. If the atoms were to rotate about the pi bond, the overlap would be disrupted, leading to the breaking of the pi bond. Thus, the statement that atomic orbitals rotate freely about pi bonds is incorrect. ### Step 3: Conclusion - **Assertion**: True (sigma bonds are stronger than pi bonds). - **Reason**: False (atomic orbitals do not rotate freely about pi bonds). ### Final Answer The assertion is true, but the reason is false. Therefore, the correct option is that the assertion is true and the reason is false. ---
To solve the question regarding the assertion and reason about sigma and pi bonds, let's break it down step by step: ### Step 1: Understand the Assertion The assertion states that "sigma bond is strong while pi bond is a weak bond." - **Explanation**: Sigma (σ) bonds are formed by the head-on overlap of atomic orbitals, which allows for a strong bond due to the direct overlap. This makes sigma bonds stronger than pi bonds. ### Step 2: Evaluate the Reason ...
Promotional Banner

Similar Questions

Explore conceptually related problems

Why is sigma -bond stronger than pi -bond ?

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. Compound having maximum bond angle is :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. Compound having maximum bond angle is :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. The strength of bonds formed by 2s-2s,2p-2p and 2p-2s overlap has the order :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. The correct order of increasing C-O bond length of CO,CO_(3)^(2-),CO_(2) is :

A covalent bond will be formed by the overlapping of atomic orbitals having single electron of opposite spin, according to the overlapping of atomic orbitals the covalent bond may be of two types : (i) Sigma bond (sigma) " " (ii) Pi bond (pi) Sigma bond is stronger bond than the Pi-bond. If atomic orbitals overlap about the nuclear axis then sigma bond is formed but when atomic orbitals overlap sideway then Pi-bond is formed. The strength of bonds formed by 2s-2s,2p-2p and 2p-2s overlap has the order :

Assertion :-The o-bond is stronger as compared to a pi -bond. Reason :-The axial overlapping of atomic orbitals is much more as compared to their sidewise overlapping.

Assertion (A) : F-F bond in F_2 molecules is weak. Reason (R) : F Atom is small in size.

Which of the following statements are correct? 1. A sigma bond is stronger than a pi bond 2. A covalent bond is stronger than a hydrrogen bond 3. HF is more polar than HCl 4. There is one electrovalent bond and three covalent bonds in methylene chloride Select the correct answer using the codes given below

what is a sigma and a pi bond.