The chemical equation of water is H₂O, Which of the following MS-Word features can be used to write H₂O?

The correct answer is Subscript.

Key Points

• While writing a chemical formula H₂O, the number of molecules is denoted in the subscript form.
• There is a provision in Microsoft Office Word to write the number in the subscript form by using the 'Subscript' option.
• Subscript: 
  • The <sub> tag is used to add a subscript text to the HTML document.
  • The <sub> tag defines the subscript text.
  • Subscript text appears half a character below the normal line and is sometimes rendered in a smaller font.
  • Subscript text can be used for chemical formulas, like H₂O to be written as H₂O.

Additional Information

• Drop cap
  • ​MS Word provides a special feature known as a drop cap.
  • A drop cap is a large capital letter that presents at the beginning of a text block or a paragraph and has the depth of two or more lines of regular text. 
  • A drop cap is the largest capital letter or a word(according to the user requirement) which is used as a decorative element at the beginning of a paragraph.
• Superscript​
  • ​Superscript is a character(s) half the height of a standard character and printed higher than the rest of the text.
  • An example of a superscript is 2⁵. 
  • Superscript can be used for exponents in mathematics.
• Strikethrough
  • ​Strikethrough is a font effect that causes text to appear as though it is crossed out. 
  • Strikethrough is often used to indicate text that is no longer valid in a document or on a web page.