A. By burning of gas
B. By cooling of the gas
C. By the bombardment of cathode rays on gas molecules
D. From anode like cathode rays produced from cathode
Related Mcqs:
- Positive rays give flash on________________?
A. AgNO3 plate
B. AgCl plate
C. ZnO
D. ZnS - Which one is not true about cathode rays ?
A. 9.11×10-31 Kg
B. Cast shadow
C. Heat up the platinum foil
D. Cannot ionize - Atom with higher atomic number produces X-rays of__________________?
A. Shorter wavelength
B. Larger wavelength
C. X-ray not produced
D. All are possible - Colour of fluorescene produced by cathode rays depends upon________________?
A. Temperature
B. Pressure
C. Volume
D. Composition of glass - Which of the following properties prove that cathode rays are material in nature_________________?
A. they cast shadow
B. they possess momentum
C. they are negatively charged
D. all of the above - The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called________________?
A. Dipole-dipole forces
B. Ion dipole-dipole forces
C. London dispersion forces
D. Debye forces - Planks theory says energy is emitted__________________?
A. In continuous manner
B. Discontinuous manner
C. Simultaneously
D. In the form of heat - Electronic configuration of K is_________________?
A. [Ar]4s2
B. [Ar]4s1
C. [Kr]5s1
D. [He]2s1 - The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________?
A. 7
B. 10
C. 12
D. 16 - Increase in atomic number is observed during_________________?
A. Alpha emission
B. Beta emission
C. Both A & B
D. Radioactivity
