ATOMS AND NUCLEI

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ATOMS AND NUCLEI - Topic Wise Multiple Choice Questions (MCQ)

Topic Wise free Atoms and Nuclei MCQ with solutions for 11th 12th exam Practice Multiple Choice Questions and answer for JEE-mains State CET Engineering Entrance GATE free Online Test



1 )

A radioactive substance decays to (1 / 16)th of its initial activity in 40 days. the half life of the radioactive substance expressed in day is

20
8
10
12


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2 )

If the binding energy of electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the second excited state of Li++ is

13.6 eV
3.4 eV
30.6 eV
122.4 eV


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3 )

The radio of minimum to maximum wave length in Balmer series is

(1 / 4)
(5 / 36)
(3 / 4)
(5 / 9)


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4 )

Plutonium decays with half life time 24000 yrs. if Plutonium is stored after 72000 yrs, the fraction of it that remain

(1 / 2)
(1 / 9)
(1 / 12)
(1 / 8)


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5 )

The nuclear 7N14 and 6C13 can be described as

Isotones
Isobars
Isotope
Isomer


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