Which of the following is/are true about A', B', C' and D'? A. Order of atomic radii: B'<A'<D'<C' B. Order of metallic character : B'<A'<D'<C' C. Size of the element: D'<C'<B'<A' D. Order of ionic radii : B'⁺<A'⁺<D'⁺<C'⁺
Choose the correct answer from the options given below :
(A)A only
(B)A, B and D only✓ Correct
(C)A and B only
(D)B, C and D only
Answer: (B)
Solution
Along a period (left to right), atomic size and metallic character decrease; down a group, both increase. Here A', B' lie in one period with B' to the right of A', and C', D' lie in the period directly below, with D' to the right of C'.
A: atomic radii follow B′<A′<D′<C′ — consistent with the trends above, true.
B: metallic character follows the identical pattern, B′<A′<D′<C′ — true.
C: this reorders the sequence as D′<C′<B′<A′, which contradicts the established order — false.
D: the corresponding cations follow the same period/group logic: B′+<A′+<D′+<C′+ — true.
Statements A, B and D are correct.
JEE Main · 2024 · 31 Jan 2024 · Shift 2 · Single correct option
