JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Self Evaluation Test - Some Basic Concepts of Chemistry

Choose the incorrect formula out of the four compounds for an element X below:

A) \[{{X}_{2}}{{O}_{3}}\]

B) \[{{X}_{2}}C{{l}_{3}}\]

C) \[{{X}_{2}}{{(S{{O}_{4}})}_{3}}\]

D) \[XP{{O}_{4}}\]

Correct Answer: B

Solution :

[b] \[{{X}_{2}}{{O}_{3}}\Rightarrow {{X}^{3+}}{{O}^{2-}}\]

\[{{X}_{2}}C{{l}_{3}}\Rightarrow {{X}^{3+}}C{{l}^{2-}}\]

\[{{X}_{2}}{{(S{{O}_{4}})}_{3}}\Rightarrow {{X}^{3+}}S{{O}_{4}}^{2-}\]

\[XP{{O}_{4}}\Rightarrow {{X}^{3+}}P{{O}_{4}}^{3-}\]

Because \[C{{l}^{2-}}\]does not exist. So, \[{{X}_{2}}C{{l}_{3}}\]is incorrect.

The correct formula should be\[XC{{l}_{3}}.\]