A. Cathode ray tube
B. Geiger-Muller counter
C. Mass spectrometer
D. X-ray tube

Correct Answer: Option B

B. Geiger-Muller counter

SEE ALSO  An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]

Copyright warnings! Do not copy.