engineering chemistry MCQ #949

engineering chemistry MCQ #949

1. Question 1

   Q1. The wavelength of a spectral line in the Lyman series is given by

   • A) 1 / λ = R * (1 / 1² - 1 / n²)
   • B) 1 / λ = R * (1 / 2² - 1 / n²)
   • C) 1 / λ = R * (1 / 3² - 1 / n²)
   • D) 1 / λ = R * (1 / 4² - 1 / n²)

   Answer: 1 / λ = R * (1 / 1² - 1 / n²)

   Explanation: Lyman series corresponds to transitions to n = 1, so 1 / λ = R * (1 / 1² - 1 / n²).