Quantrex Academy · Free BITSAT PYQ solutions
BITSAT Chemistry Chemical Bonding and Molecular Structure 2021 BITSAT 2021

BITSAT Chemistry Question (2021) — Solution

Question

Which of the following represents the correct order of Cl - O bond lengths in ClO ^ - , ClO _ 2 ^ - , ClO _ 3 ^ - , ClO _ 4 ^ - ?

Options

  1. A. ClO _ 4 ^ - = ClO _ 3 ^ - = ClO _ 2 ^ - = ClO ^ -
  2. B. ClO ^ - < ClO _ 2 ^ - < ClO _ 3 ^ - < ClO _ 4 ^ -
  3. C. ClO _ 4 ^ - < ClO _ 3 ^ - < ClO _ 2 ^ - < ClO ^ -
  4. D. ClO _ 3 ^ - < ClO _ 4 ^ - < ClO _ 2 ^ - < ClO ^ -

Answer

C. ClO _ 4 ^ - < ClO _ 3 ^ - < ClO _ 2 ^ - < ClO ^ -

Step-by-step solution

The b.o in Cl - O ^ - is 1 The b.o in O = Cl - O ^ - is 1.5 The b.o. in O = Cl = O is 5 3 =1.66 The b.o. in O = O O \| l - O ^ - is 7 4 =1.75 The bond length increases as b.o. decreases.

Practice more on Quantrex App →

Related: Chemistry — Chemical Bonding and Molecular Structure · All PYQ Banks