1. The reaction taking place in stars making them shine is
A. nuclear fusion
B. nuclear fission
C. neutron emission
D. gamma decay
2. Which of the following method is used for measuring the age of the earth?
A. Carbon dating process
B. Biotechnology law
C. Biological clock method
D. Uranium process
3. Carbon dating is used to determine the age of
A. trees
B. earth
C. fossils
D. rocks
4. Which one of the following is incorrect?
A. Theory of evolution was propounded by Charles Darwin.
B. The breaking apart of the nucleus of an atom is called fusion.
C. Dry ice is nothing but solid carbon dioxide.
D. Telephone was invented by Graham Bell.
5. Which of the following archaeological samples is adopted to determine the age of firewood bone and shell?
A. Uranium-238
B. Argon-isotopes
C. Carbon-14
D. Strontium-90
6. 'Radioactive dating' is a technique which can be used to measure?
A. The age of rocks
B. Composition of rocks
C. Colour of rocks
D. Weight of rocks
7. Harnessing of nuclear energy often causes
A. air pollution
B. water pollution
C. thermal pollution
D. noise pollution
8. Natural radioactivity was discovered by
A. Marie Curie
B. Ernest Rutherford
C. Henri Becquerel
D. Enrico Fermi
9. Radioactivity is measured by
A. radiometer
B. ammeter
C. magnetometer
D. Geiger-Muller Counter
10. Which among the following is a positively charged particle emitted by a radioactive element?
A.
B.
C.
D.
11. When -particle emits from a radioactive element then
A. atomic number decreases by 2 and mass number decreases by 4 .
B. atomic number decreases by 1 and mass number decreases by 2 .
C. atomic number increases by 1.
D. atomic number and mass number remains same.
12. Which of the following metals are used as catalyst in the Catalytic converters to eliminate poisonous gases?
A. Sodium
B. Thorium
C. Rhodium
D. None of these
13. Which of the following particles has zero charge?
A. Positron
B. Neutrino
C. Electron
D. -particle
14. With reference to the radioactivity, which of the following statements is/are correct?
2. Hydrogen bomb is prepared on the principle of nuclear fission.Select the correct answer using the codes given below.
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
15. Which of the following radio isotopes is used in the treatment of blood cancer (leukemia)?
A. Iodine-131
B. Sodium-24
C. Phosphorus-32
D. Cobalt-60
© 2024 | The Tutors Academy | Website Conceptualised and Developed by Promotion Paradise
