Skip to content

JEE MAIN 2026 · Chemical Bonding and Molecular Structure

JEE Main 2026 Session 2 Question Paper: 8 Apr, Shift 2 (B.E./B.Tech), question 53

Updated
Single correct+4 / -1Answer matches NTA’s final key

Bromine trifluoride autoionizes to form BrF2⊕_2^{\oplus} and BrF4⊖_4^{\ominus}. The shapes of the cation and anion are respectively ______, and ______.

Choose one

Solution

Solution

Count electron pairs on bromine (7 valence electrons):

  • BrF2+_2^+: 7−1=67 - 1 = 6 electrons; 2 used in Br–F bonds, leaving 2 lone pairs. Four pairs in all (sp3^3), two of them lone: bent.
  • BrF4−_4^-: 7+1=87 + 1 = 8 electrons; 4 used in bonds, leaving 2 lone pairs. Six pairs (sp3^3d2^2), the two lone pairs opposite each other: square planar.

Answer: bent, square planar.

Answer checked against the official answer key. The solution is our own working.

Keep going

Bromine trifluoride autoionizes to form… | SchoolToCareer