Question

Which of the following acids is obtained when sulphur trioxide reacts with water?
A. ${{H}_{2}}S$
B. ${{H}_{2}}$
C. ${{H}_{2}}S{{O}_{3}}$
D. ${{H}_{2}}S{{O}_{4}}$

Answer 1

Hint: An oxide is a chemical compound which contains at least one oxygen atom with any another element. Oxide is a di anion of oxygen represented as ${{O}^{2-}}$ . In this state the oxygen is present in -2 oxidation state and acts as an anion which carries negative charge.

Complete answer:
Oxides may be of three types known by the name acidic oxide, basic oxide and amphoteric oxide oxides that can add on hydrogen ions to their molecules is known as acidic oxide, when it add hydroxide ions to their molecules then it is known by the name basic oxide whereas amphoteric oxide are those oxides which can act as both acidic as well as basic oxides.
When sulphur trioxide reacts with water or we can say dissolve in water then it forms hydrogen ions to form acids which specify that it is the form of acidic oxide. Sulphur trioxide reacts with water to form an acid known by the name sulphuric acid represented by the chemical formula ${{H}_{2}}S{{O}_{4}}$.

Hence from the above discussion we can say that option D is the correct answer.

Note:
Oxides can be formed due to the electronegative nature of oxygen which forms stable chemical bonds with almost all metals and they give corresponding oxides of that metal. Ratio of metal oxide tells us how many metals and oxygen atoms are connected with each other.