Related Questions

The disintegration rate of a radioactive element
A Progressively increases
B Progressively decreases
C Remains constant throughout
D May increase or decrease depending on the material
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
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
Emission of β-particles during radioactive decay of a substance is from
A Innermost shell
B Nucleus
C Outermost shell
D None of these
Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
A 0.8
B 7.8
C 200
D 10000
Disintegration of the USSR occurred in:
A 1988
B 1989
C 1991
D 1987
Choose the best meaning for the underlined word on the phrase that can be best substitute to keep the meaning of a original sentence. The disintegration of joint family is producing a number of psychotic disorder.
A Abolishment
B Breakdown
C Postponement
D Withdrawal
Which of the following may be used to measure the rate of nuclear disintegration?
A Geiger-Muller Counter
B Cold Chamber
C Cyclotron
D Van De Graph Generator
Which one of the following was the cause of disintegration of the Mughal Empire?
A War of succession among sons of Aurangzeb
B Attacks of Nadir Shah and Ahmad Shah Abdali
C Revolts of various communities like Jats, Sikhs, Rajputs etc.
D All of the above mentioned factors contributed to the downfall of the Mughal Empire.

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