Question

Match List-I with List-II.

List-I (Elements)	List-II (Properties in their respective groups)
(A) Cl,S	(I) Elements with highest electronegativity
(B) Ge, As	(II) Elements with largest atomic size
(C) Fr, Ra	(III) Elements which show properties of both metals and non metal
(D) F, O	(IV) Elements with highest negative electron gain enthalpy

Choose the correct answer from the options given below:

• A. A-II, B-III, C-IV, D-I
• B. A-III, B-II, C-I, D-IV
• C. A-IV, B-III, C-II, D-I
• D. A-II, B-I, C-IV, D-III

Answer 1

The Correct Option is C

1. To solve the given question, we must match elements in List-I with their corresponding properties in List-II.
2. First, examine each option in List-I:
   • (A) Cl, S: Chlorine (Cl) and Sulfur (S) are non-metals. Both are known for their high electron gain enthalpies, especially chlorine, which often has the highest negative electron gain enthalpy in its group.
   • (B) Ge, As: Germanium (Ge) and Arsenic (As) are metalloids, showcasing properties of both metals and non-metals.
   • (C) Fr, Ra: Francium (Fr) and Radium (Ra) are metals with large atomic sizes. They are found in the alkali metal and alkaline earth metal groups, respectively.
   • (D) F, O: Fluorine (F) and Oxygen (O) are known for their high electronegativity values, with fluorine being the most electronegative element.
3. Now, map each element pair to the correct property in List-II:
   • (A) Cl, S aligns with (IV) Elements with highest negative electron gain enthalpy.
   • (B) Ge, As fits with (III) Elements which show properties of both metals and non-metals.
   • (C) Fr, Ra matches with (II) Elements with largest atomic size.
   • (D) F, O corresponds to (I) Elements with highest electronegativity.
4. The correct matching is: A-IV, B-III, C-II, D-I.
5. This matches with the given option:

A-IV, B-III, C-II, D-I

Answer 2

1. Analyze the Elements in List-I:
   • (A) Cl, S: Chlorine (Cl) and Sulfur (S) are elements from the halogen and chalcogen groups, respectively. These elements are known to have high negative electron gain enthalpy, meaning they readily gain electrons to form negative ions.
   • (B) Ge, As: Germanium (Ge) and Arsenic (As) are placed in the carbon and nitrogen groups/columns. These elements are known as metalloids, meaning they exhibit properties of both metals and non-metals.
   • (C) Fr, Ra: Francium (Fr) and Radium (Ra) are alkali and alkaline earth metals, respectively. These elements have large atomic sizes compared to other elements in their periods.
   • (D) F, O: Fluorine (F) and Oxygen (O) possess highest electronegativity values in the periodic table, indicating a strong tendency to attract electrons towards themselves.
2. Match Elements with Their Properties:
   • (I) Elements with highest electronegativity: Fluorine (F) and Oxygen (O) fit this category as they have high electronegativity values.
   • (II) Elements with the largest atomic size: Francium (Fr) and Radium (Ra) possess larger atomic sizes, typical as you move down the group in the periodic table.
   • (III) Elements which show properties of both metals and non-metals: Germanium (Ge) and Arsenic (As) are metalloids, placing them in this category.
   • (IV) Elements with the highest negative electron gain enthalpy: Chlorine (Cl) and Sulfur (S) fall into this category, as both are known for high electron affinity values.
3. Conclusion: The correct matches based on the provided explanation are:

List-I (Elements)	List-II (Properties in their respective groups)
(A) Cl, S	(IV) Elements with highest negative electron gain enthalpy
(B) Ge, As	(III) Elements which show properties of both metals and non-metals
(C) Fr, Ra	(II) Elements with the largest atomic size
(D) F, O	(I) Elements with highest electronegativity

1. Thus, the correct answer is: A-IV, B-III, C-II, D-I.