Q. A metal is burned in oxygen to form an oxide. The oxide dissolves in water and a few drops of universal indicator are added. What colour does the indicator turn?
Solution:
Because metallic oxides are basic in nature. They react with dilute acids to form salt and water. Group 1 & 2 oxides are highly alkaline in nature that is why group 1 called alkaline metals and group 2 called Alkaline Earth metals. Because of basic nature the colour of the indicator turn blue .
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