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 Lakhmir Singh Chemistry Class 10

Which of the following elements would form oxides which would indicate

1.	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 Lakhmir Singh Chemistry Class 10
Answer» Using moist pH PAPER Sulphur and Carbon will show pH value less than 7. When a proton is being donated by an ION or a molecule, it is called acid.Carbon on reacting with oxide becomes carbon DIOXIDE, which gives carbonic acid on dissolving in water. Sulphur on reacting with oxide becomes Sulphur dioxide, which gives acid RAIN on dissolving in water.So, both Carbon dioxide and Sulphur dioxide are in gaseous state, and gives acidic product on reaction with water.