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Explain with the help of an activity the nature of the oxide formed when sulfur burned in oxygen.
Answer variants:
change to green
changed to green
non-metal oxides
remains the same
sulfurous acid
Non-metals
acidic
sulfur dioxide gas
changed to red
When a small amount of sulphur powder is taken on a spatula and heated over a burner,  
is liberated which is collected by placing an inverted test tube over the spatula. Filled the test tube with distilled water and shaked it. On dissolving this gas in water,
is formed. On a watch glass, added a few drops of the solution and place blue and red litmus paper on it. 
 
Among the red and blue litmus papers, the colour of the blue litmus paper
. The colour of red litmus paper
. The difference in the colour of blue litmus paper suggests that the gas is
in nature. 
 
react with oxygen to form
. They are mostly
in nature.