The colour of liquid $O_2$ is

There is no $S-S$ bond in

Given below are two statements $:$
Statement $I : H_2Se$ is more acidic than $H_2Te$.
Statement $II : H_2Se$ has higher bond enthalpy for dissociation than $H_2Te$.
In the light of the above statements,choose the correct answer from the options given below.

When oxygen is passed through a solution of $Na_2SO_3$,we get:

Which of the following statements is incorrect?

Oxygen is more electronegative than sulphur,yet $H_2S$ is acidic while $H_2O$ is neutral. This is because