Question

Consider the following statements :
I. The atoms of different elements are present in a compound in a fixed and definite ratio.
II. In compounds like $NaCl$, the positive and negative entities are arranged in two dimensional structure.
III. In $NaCl$, one $N{a}^{+}$ion is surrounded by $12C{l}^{-}$ions and vice-versa.
Choose the option with all the incorrect statements :

• A. $I$ and $II$
• B. $II$ and $III$
• C. Only $III$
• D. $I,II$ and $III$

Answer 1

Answer: (B)

Statements $II$ and $III$ are incorrect.
It's correct form are as follows :
$II$. In such compounds, positive ( $N{a}^{+}$ion) and negative ( $C{l}^{-}$ion) entities are arranged in a three-dimensional structure.
$III$. In $NaCl$, one $N{a}^{+}$ion surrounded by $6C{l}^{-}$ions and vice-versa.
Statement $I$ is correct.