Home
Class 12
CHEMISTRY
In the following questions a statement o...

In the following questions a statement of assertion (A) is followed by a statement of reason ( R)
A : F is most electronegative element of periodic table.
R : CI is having highest electron affinity.

A

If Both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1) .

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)

C

If Assertion is true statement but Reason is false then mark (3)

D

If both Assertion and Reason are false statements then mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Assertion (A):** - The assertion states that "Fluorine is the most electronegative element of the periodic table." - Electronegativity is defined as the tendency of an atom to attract shared electrons in a chemical bond. Fluorine, being the smallest halogen, has a high effective nuclear charge and a small atomic radius, which allows it to attract electrons effectively. 2. **Understanding the Reason (R):** - The reason states that "Chlorine is having the highest electron affinity." - Electron affinity is the energy change that occurs when an electron is added to a neutral atom in the gaseous phase to form a negative ion. Chlorine has a high electron affinity because it is one electron short of a stable octet configuration. 3. **Analyzing the Relationship Between A and R:** - While both statements are true, they refer to different properties of the elements. The assertion is about electronegativity (which is highest for fluorine), while the reason discusses electron affinity (which is highest for chlorine). - Fluorine has a high electronegativity due to its small size, but it does not have the highest electron affinity because of the repulsion that occurs when an extra electron is added to its small atomic structure. 4. **Conclusion:** - Both statements are true, but the reason provided does not correctly explain the assertion. Therefore, the correct conclusion is that the assertion is true, the reason is true, but the reason is not the correct explanation for the assertion. **Final Answer:** Both A and R are true, but R is not the correct explanation for A. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : H-F forms stronger hydrogen bond than H_(2) O. R : F is more electronegative than oxygen.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R). A : At the highest point the velocity of projectile is zero . R: At maximum height projectile comes to rest.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R) A : Atomic radii decreases in a period upto halogen . R : van der Waal radii of CI is larger than its covalent radii.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : BeCl_(2) in vapour phase is electron deficient molecule. R : Any molecule in which central atom is having incomplete octet is known as electron deficient molecule.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : Both methane and tetrachloromethane are nonpolar. R : C-Cl bond is polar bond.

In the following questions, a statement of assertion (A) is followed by a statement of reason (R ) A : PCl_(5) exist but NCl_(5) does not R : Nitrogen is highly inert.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R) A : Electron affinity of oxygen is higher than suiphur. R : Number of valence orbitals containing electrons are different.

In the following questions a statement of assertion (A) is followed by a statement of reason ( R) A : Lanthanum ( Z: 57) is lanthanoid . R : Valence electrons are present in 4 f orbital.