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
The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from:
A 10-10 to 106 m
B 10-8 to 106 m
C 10-10 to 1010 m
D 10-8 to 108 m
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 of the following is the correct sequence of countries in terms of maximum carbon dioxide emission?
A China, USA, European Union, India
B USA, India, China, European Union
C China, India, European Union, USA
D European Union, China, USA, India
Acid rain is caused due to emission of which of the following into the atmosphere ?
A Oxides of nitrogen and sulphur
B Carbon dioxide and carbon monoxide
C Ozone and carbon dioxide
D Carbon monoxide and nitrogen
Which of the following is not a source of ozone emission in the atmosphere?
A Refrigerators
B Xerox machines
C Dermatological photo-therapy equipments
D High voltage electrical equipments
হাইড্রোজেন পরমাণুর আদি শক্তিস্তর ni থেকে চূড়ান্ত শক্তিস্তর nf - এ স্থানান্তরের ফলে নিম্নলিখিত কোনটির ক্ষেত্রে সর্বাধিক শক্তি নির্গত হয়? (Which of the following transitions from an initial state ni to a final state nf in a hydrogen atom results in the most energy emission?)
A ni=80, nf=2
B ni=1, nf=2
C ni=3, nf=90
D ni=2 , nf=1
Which one is the top country in terms of per capita greenhouse gas emission?
A Japan
B USA
C China
D Brazil
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

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