Atoms Molecules And Nuclei QUESTIONS AND ANSWERS

IIT JEE : Atoms Molecules And Nuclei QUESTIONS AND ANSWERS :: part2 : 11 to 15

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

11.Half life period of a radioactive substance is 10 minute, then amount of substance decayed in 40 minutes will be

25%

50%

75%

None of these

12.Energy emitted in a hydrogen atom when an electron jumps from 4 th orbit to second orbit is

1.51 eV

1.81 eV

2.55 eV

3.40 eV

13.Minimum energy required for excitation of an electron from the ground state in a hydrogen atom is

13.6 eV

1.81 eV

2.55 eV

3.40 eV

14.Half life of a radio isotope is 50 years. Fraction of the atoms of the material that is left after 100 years is

25%

50%

75%

None of these

15.Half life of substance is 20 minutes. What is the time between 33% decay and 67% decay ?

20 minutes

25 minutes

30 minutes

40 minutes

More Atoms Molecules And Nuclei QUESTIONS AND ANSWERS available in next pages

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