engineering chemistry MCQ #924

engineering chemistry MCQ #924

1. Question 1

   Q1. The wavelength of a spectral line is given by

   • A) 1 / λ = R (1 / n1² - 1 / n2²)
   • B) 1 / λ = R (1 / n1 - 1 / n2)
   • C) λ = R (1 / n1² - 1 / n2²)
   • D) λ = R (1 / n1 - 1 / n2)

   Answer: 1 / λ = R (1 / n1² - 1 / n2²)

   Explanation: Rydberg formula gives the wavelength of spectral lines using 1 / λ = R (1 / n1² - 1 / n2²).