NEETChemistryp Block Elements (Group 13 & 14)
The correct statements from the following are : (A) The decreasing order of atomic radii of group 13 elements is ( Tl > ) In (> Ga > Al > B ). (B) Down the group 13 electronegativity decreases from top to bottom. (C) ( Al ) dissolves in dil. ( HCl ) and liberates ( H ₂ ) but conc. ( HNO ₃ ) renders ( Al ) passive by forming a protective oxide layer on the surface. (D) All elements of group 13 exhibits highly stable +
Options
- A(A), (C) and (E) only
- B(A) and (C) only
- C(C) and (E) only
- D(A), (B), (C) and (E) only
Correct answer
C. (C) and (E) only
Step-by-step solution
A. size order T > In > Al > Ga > B B. Electronegativity order B > Al < Ga < In < T D. B , Al are more stable in +3 oxidation state So, only C, E statements are correct.