Nuclear Chemistry QUESTIONS AND ANSWERS

IIT JEE : Nuclear Chemistry QUESTIONS AND ANSWERS :: part2 : 16 to 20

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

16.The half-life period of radioactive material is 15 minutes. What percent of the material will remain after 45 minutes?

10%

12.5%

15%

17.5%

17.Thermonuclear reactions are responsible for energy production

at the centre of the earth

inside the stars

in volcanoes

in the modern spaceships.

18.Half life period of a radioactive substance is 10 years. The amount of the substance decayed after 40 years would be

25%

12.5%

93.75%

6.25%.

19.The nucleus of a radioactive atom, which emits betarays, contains the following particles.

Neutrons only

Neutrons, protons and alpha particles

Neutrons and protons

Neutrons, protons and radioactive electrons.

20.The half-life period of a radioactive substance is 20 days. How long will it take for 3/4 of the atoms originally present to disintegrate?

60 days

30 days

10 days

40 days.

More Nuclear Chemistry QUESTIONS AND ANSWERS available in next pages

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