Which symbol is commonly used to indicate the pressure at which a chemical reaction is carried out?

• A. n
• B. V
• C. P
• D. T

Answer: (C)

Verified step by step guidance

1. Understand that in chemistry, different symbols represent different physical quantities. For example, 'n' typically represents the amount of substance in moles, 'V' represents volume, and 'T' represents temperature.
2. Recall that pressure is a fundamental variable in many chemical reactions, especially those involving gases, and it is commonly denoted by the symbol 'P'.
3. Recognize that the symbol 'P' is used to indicate the pressure at which a chemical reaction is carried out, as it is a standard notation in chemistry.
4. Confirm that the other options ('n', 'V', 'T') do not represent pressure, but rather other physical quantities as mentioned earlier.
5. Therefore, the correct symbol to indicate pressure in a chemical reaction is 'P'.