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Which of the following elements would form oxides which would indicate pH values less than seven, using moist pH paper?Magnesium, Carbon, Sulphur, Hydrogen, Copper
Sulphur and carbon burn in the air to form sulphur dioxide and carbon dioxide. As both are acidic oxides, therefore,they will show pH value less than 7.
As hydrogen will form water by reacting with oxygen, so its pH will be 7, as it is neutral.
Magnesium and copper does not form oxides having less than pH 7 as their oxides are basic in nature.
Updated on: 10-Oct-2022
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