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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Choose the correct option. X2760X227260CO decays with a half-life of 5.27 years to produce X2860X228260Ni. What is the decay constant for such radioactive disintegration? - Chemistry

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प्रश्न

Choose the correct option.

\[\ce{^60_27CO}\] decays with a half-life of 5.27 years to produce \[\ce{^60_28Ni}\]. What is the decay constant for such radioactive disintegration?

पर्याय

  • 0.132 y-1

  • 0.138

  • 29.6 y

  • 13.8%

MCQ
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उत्तर

0.132 y-1

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Nuclear Chemistry and Radioactivity - Exercises [पृष्ठ २०२]

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बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 13 Nuclear Chemistry and Radioactivity
Exercises | Q 1. (C) | पृष्ठ २०२

संबंधित प्रश्‍न

Describe alpha, beta and gamma decays and write down the formulae for the energies generated in each of these decays.


Complete the following equation describing nuclear decay.

\[\ce{_8^19O->e^- { +}}\] _____


Complete the following equation describing nuclear decay.

\[\ce{_90^228Th->\alpha { +}}\] _____


Write relation between decay constant of a radioelement and its half-life.


Derive the relationship between half-life and decay constant of a radioelement.


The half-life of 35S is 87.8 d. What percentage of 35S sample remains after 180 d?


In Hydrogen, the electron jumps from the fourth orbit to the second orbit. The wavenumber of the radiations emitted by an electron is ______  


The decay constant λ of a certain radioactive material is 0.2166 per day. The average life τ of the radioactive material is ______ 


The half-life of a certain radioactive species is 6.93 × 105 seconds. What is the decay constant?  


Show that half life period of radioactive material varies inversely to decay constant λ.


The half-life of a certain radioactive nucleus is 3.2 days. Calculate (i) decay constant (ii) average life of radioactive nucleus.


Show that for radioactive decay N(t) = `"N"_"O" "e"^{-λ"t"}`, where symbols have their usual meaning.


A radioactive substance decays to (1/10)th of its original value in 56 days. Calculate its decay constant. 


A radioactive substance of half-life 69.3 days is kept in a container. The time in which 80% of the substance will disintegrate will be ______

[take ln(5) = 1.61]


The rate of radioactive disintegration at an instant for a radioactive sample of half-life 2.2 x 109 s is 1010 s-1. The number of radioactive atoms in that sample at that instant is, ______ 


Most excited states of an atom have life times of about ____________.


A radioactive substance has half life of 3 hours. 75 % of the substance would decay in ____________.


What is beta decay?


The radioactivity of a sample is R1 at a time T1 and R2 at a time T2. If the half-life of the specimen is T, the number of atoms that have disintegrated in the time (T1 - T2) is proportional to ______.


A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it become 2500 disintegrations per minute. The decay constant per minute is ______.


For radioactive substances, the fraction of its initial quantity (N0) which will disintegrate in its average lifetime is about ______.

(e = 2.71)


The half-life of a radioactive substance is 10 days. The time taken for the `(7/8)^"th"` of the sample of disintegrates is ______.


The graph obtained by plotting loge (A) [A is the activity of a radioactive sample] against t (time) out of the following is:


The disintegration rate of a radio-active sample is 1010 per hour at 20 hours from the start. It reduces to 5 × 109 per hour after 30 hours. Calculate the decay constant.


The half-life of \[\ce{^238_92U}\] undergoing ∝- -decay is 4.5 × 10years. What is the activity of 1g sample of \[\ce{^238_92U}\]?


Define half-life period.


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