Question

Which of the following chemical formulae is correct?

• A. NaCl₂
• B. KCl
• C. NaCl₃
• D. KCl₄

Answer 1

The correct option is B

KCl

For any given molecule, the net charge over the molecule should be zero.

In $Na{Cl}_2$, +1 – 2 = -1 (Not a zero). So, formulae is incorrect.

In $KCl$, +1 – 1 = 0. So, formulae is correct.

In $Na{Cl}_3$, +1 - 3 = -2 (Not a zero). So, formula is incorrect.

In $K{Cl}_4$_, +1 - 4 = -3 (Not a zero). So, formulae is incorrect.