E-PolyLearning

16. Spectrum of different colored lines is characteristic of
a. sodium
b. potassium
c. hydrogen
d. nitrogen
View Answer Report Discuss 50-50!
Answer: (c).hydrogen

17. Cathode rays produced yellow fluorescence when strike
a. alumina
b. sodium
c. tin stone
d. potassium chromate
View Answer Report Discuss 50-50!
Answer: (c).tin stone

18. When an electron jumps from its orbit to another orbit, energy is
a. emitted only
b. absorbed only
c. emitted and absorbed
d. no effect
View Answer Report Discuss 50-50!
Answer: (c).emitted and absorbed

19. Unit used for measuring wavelength is
a. angstrom
b. centimeter
c. meter
d. millimeter
View Answer Report Discuss 50-50!
Answer: (a).angstrom

20. Magnetic quantum number is also called
a. 1st quantum number
b. 2nd quantum number
c. 3rd quantum number
d. 4th quantum number
View Answer Report Discuss 50-50!
Answer: (c).3rd quantum number

Page 4 of 120