1.

A student heated some sulphur in a spatula and collected the gas 'X'. Which one among the following is correct about 'X'?

A. X is SO2 and it turns moist litmus to blue
B. X is SO3 and it turns moist litmus to red
C. X is SO2 and it turns moist litmus to red
D. X is SO3 and it turns dry litmus to blue
Answer» D. X is SO3 and it turns dry litmus to blue


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