Question:
Lithium shows diagonal relationship with element ‘X’ and aluminium with Y. X and Y respectively are
Lithium shows diagonal relationship with element ‘X’ and aluminium with Y. X and Y respectively are
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Important diagonal relationships: Li-Mg, Be-Al, and B-Si.
Updated On: Jun 15, 2026
- Mg, Be
- Be, Mg
- Na, Si
- B, Be
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The Correct Option is A
Solution and Explanation
Step 1: Understand diagonal relationship.
Diagonal relationship is observed between certain elements of the second and third periods which show similar properties due to nearly equal ionic size, charge density, and electronegativity.
Step 2: Identify the element related to lithium.
Lithium (Li) of Group 1 shows diagonal relationship with magnesium (Mg) of Group 2.
Both show similarities such as:
Formation of nitrides Low solubility of carbonates and
Similar thermal behavior
Thus,
\[ X=\text{Mg} \]
Step 3: Identify the element related to aluminium.
Aluminium (Al) shows diagonal relationship with beryllium (Be).
Both have similar properties such as:
Amphoteric oxides Covalent character and
Polymeric hydrides
Thus,
\[ Y=\text{Be} \]
Step 4: Final conclusion.
Hence,
\[ \boxed{X=\text{Mg},\quad Y=\text{Be}} \]
Diagonal relationship is observed between certain elements of the second and third periods which show similar properties due to nearly equal ionic size, charge density, and electronegativity.
Step 2: Identify the element related to lithium.
Lithium (Li) of Group 1 shows diagonal relationship with magnesium (Mg) of Group 2.
Both show similarities such as:
Formation of nitrides Low solubility of carbonates and
Similar thermal behavior
Thus,
\[ X=\text{Mg} \]
Step 3: Identify the element related to aluminium.
Aluminium (Al) shows diagonal relationship with beryllium (Be).
Both have similar properties such as:
Amphoteric oxides Covalent character and
Polymeric hydrides
Thus,
\[ Y=\text{Be} \]
Step 4: Final conclusion.
Hence,
\[ \boxed{X=\text{Mg},\quad Y=\text{Be}} \]
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