Related Questions

β-rays emission in radioactive disintegration is always accompanied by the emission of
A γ-rays
B α-rays
C Neutrons
D None of these
Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition?
A UV absorption spectroscopy
B UV photoelectron spectroscopy
C Infrared absorption spectroscopy
D Rotational spectroscopy
When water emulsion is used as the fuel in SI engine the emission of nitrogen oxides reduces significantly, this is due to
A Water reacts with nitrogen oxides
B Water does not contain nitrogen
C The combustion temperature decreased
D The combustion temperature increased
Which of the following agreement will deal with Greenhouse gas emission mitigation, adaption and finance to be implemented from 2020?
A Uruguay Round
B Paris agreement
C Kyoto Protocol
D Cancun Agreement
Which one is the top country in terms of per capita greenhouse gas emission?
A Japan
B USA
C China
D Brazil
Which of the following is an example of continous emission spectrum?
A Spectrum of an oil frame
B Spectrum of a water
C both
D none
Radioactivity is a phenomenon of the spontaneous emission of
A protons (alpha particles)
B electrons (beta particles)
C gamma rays (short wave electromagnetic waves)
D All of the above
The amount of photoelectric emission current depends on
A Frequency of incident radiation
B Intensity of incident radiation
C Both frequency and intensity of incident radiation
D None of the above
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
A Emissivity
B Transmissivity
C Reflectivity
D Intensity of radiation
The energy required to be applied to a radioactive nucleus for the emission of a neutron is
A 1 MeV
B 2.4 MeV
C 4.3 MeV
D 7.8 MeV

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