question_answer

Which one of the following is not true at room temperature and pressure?

A)  \[{{\text{P}}_{\text{4}}}{{\text{O}}_{\text{10}}}\] is white solid

B)  \[\text{S}{{\text{O}}_{2}}\]is a colourless gas

C)  \[\text{S}{{\text{O}}_{3}}\]is a colourless gas

D)  \[\text{N}{{\text{O}}_{2}}\]is a brown gas

Correct Answer: C

Solution :

                 At room temperature \[\text{S}{{\text{O}}_{\text{3}}}\] is a solid and exists as either \[\alpha -S{{O}_{3}},\beta -S{{O}_{3}}\]or \[\gamma -S{{O}_{3}}.\alpha -S{{O}_{3}}\]have similar chains cross linked into sheets.