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

Health is the greatest gift, contentment is the greatest wealth -Buddha

Opportunity is missed by most people because it is dressed in overalls and looks like work.- Thomas Edison

Related Online Test