(C) Molecularity of a reaction may be zero. (D) For a first-order reaction, t 1/2 = 0.693/k. Correct Answer: (C) Molecularity of a reaction may be zero.

CBSE Class 12 Chemistry Answer Key 2025: The Central Board of Secondary Education (CBSE) conducted the Class 12 Business Studies examination on February 27, 2025. Following the exam, students are ...