question_answer

Which one statement about sulphur dioxide gas is incorrect?

A)  It has an angular shape

B)  It   decolourises   acidified   potassium permanganate solution

C)  Two \[S-O\] bonds are equal

D)  It is a dehydrating agent

Correct Answer: D

Solution :

                Sulphur dioxide has angular shape because of the presence of one lone pair of electrons. It reduces the acidified permanganate to\[M{{n}^{2+}},\]thus, decolourises the acidified\[KMn{{O}_{4}}\]solution. \[5S{{O}_{2}}+\underset{coloured}{\mathop{2MnO_{4}^{-}}}\,+2{{H}_{2}}O\xrightarrow[{}]{{}}5SO_{4}^{2-}\]                                                     \[+\underset{colourless}{\mathop{2M{{n}^{2+}}}}\,+4{{H}^{+}}\] It is not a dehydrating agent.