Question

A student heated some sulphur in a spatula and collected the gas 'X'. Which one among the following is correct about 'X'?; 1) X is SO2 and it turns moist litmus to red; 2) X is SO3 and it turns dry litmus to blue; 3) X is SO3 and it turns moist litmus to red; 4) X is SO2 and it turns moist litmus to blue

Answer 1

${S_8}$+8${O_2}$–»8 ${SO_2}$

Since it is non metallic oxides so it will be basic...
hence option 4 is correct✔️