NEET2023Chemistrys Block ElementsActual
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Lithium and beryllium unlike their other respective group members form compounds with pronounced ionic character. Reason ( R ) : Lithium and Magnesium have similar properties due to diagonal relationship. In the light of the above statements, choose the correct answer from the options given below:
Options
- ABoth ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A ) .
- BBoth ( A ) and ( R ) are true but ( R ) is not the correct explanation of ( A ) .
- C(A) is true but (R) is false.
- D(A) is false but ( R ) is true.
Correct answer
D. (A) is false but ( R ) is true.
Step-by-step solution
Lithium and Beryllium are the first members of their respective groups (i.e. group 1 and 2 respectively). Due to their exceptionally small atomic and ionic sizes they form compounds with covalent character not ionic. Hence, Assertion statement is wrong. Lithium and Magnesium have similar properties due to diagonal relationship hence, reason statement is correct